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REAL-WORLD ENTITY

S-57

AC

RO

NYM

S-57

CO

DE

DIG

EST

FAC

C

DIG

EST

FAC

C D

ESC

RIP

TIO

N

VPF

CO

VER

AG

E

COMMENTS

4W disposition grid Patrol area RAL A patare + catpat 20513 G

ACLANT grid Military Practice Area RAL A MIPARE + CATMPA 83 G S52 symbol SY(CHINFO06) duplicated

Aerial Tactics Area Military exercise airspace RAL A mexasp + catmea 20511 G None

Aerodrome Traffic Zone Controlled airspace RAL L, A ctlasp + catcas 20495 G Geosym 0761 duplicated

Air Defence Identification Zone Military exercise airspace RAL A mexasp + catmea 20511 G

Airborne Early Warning Area Airspace Restriction RAL A airres + catasr 20485 G GA015 Special Use Airspace?

Air-to Air Refuelling Area Military exercise airspace RAL A mexasp + catmea 20511 G

Airway Controlled airspace RAL L, A ctlasp + catcas 20495 G

Altimeter Setting Region Controlled airspace RAL L, A ctlasp + catcas 20495 G Geosym 0761 duplicated

Anchorage Area Anchorage Area ESB A ACHARE 4 G BB010 - Anchorage

Area of Imagery Coverage Area of Imagery Coverage Area covered by photographic or satellite imagery (AML) ESB A imgare 20486 G

Areas of Intense Aerial Activity Military exercise airspace RAL A mexasp + catmea 20511 G

Artificial Obstacle Shoreline Construction ESB L A SLCONS 122 G

ATS Route Centreline ATS Route Centreline RAL L atsctl 20484 G GA010 ATS Route Segment/Leg

Avoidance Area Controlled airspace RAL L, A ctlasp + catcas 20495 G Geosym 0761 duplicated

Backshore Land Region ESB A LNDRGN + CATLND 73 G BA022 - Backshore

Battery Fortified Structure ESB P, A FORSTC + CATFOR 59 G AL015 - Building + bfc=99

Beach Beach ESB N/A C_AGGR 400 C catbch, NOBJNM, OBJNAM Composite object

Beach Land Region ESB A LNDRGN + CATLND 73 G BA050 - Beach

Beach Area Sea Area ESB A SEAARE 119 G ZD040 Named Location ecr

Beach Exit Beach Exit Point from which exit can be made from the beach. (AML) ESB P, L bchext 20487 G AQ090 - Entrance/Exit A point of entrance or exit

Beach Profile Beach Profile ESB L bchprf 20488 G bearng, gradnt, SUREND

Beach Sector Sea Area ESB A SEAARE 119 G ZD040 Named Location

Beach Survey Beach Survey Area of shoreline for which a beach survey record exists. (AML) ESB P A bchare 20489 G BA050 - Beach

Beacon, cardinal Beacon, cardinal MFF P BCNCAR 5 G

Beacon, isolated danger Beacon, isolated danger MFF P BCNISD 6 G

AML FEATURE CLASSNote: AML codes have been derived from the first non-standard No. available.Geo Objects 20484 (16388+4096) Meta Objects from 21484 (20484+1000)

AML FEATURE CLASS DESCRIPTIONProduced by the United Kingdom Hydrographic Office 26/07/04© British Crown Copyright 2004

AM

LSP

EC(S

)

AM

L G

EO P

RIM

ITIV

E(S)

P =

Poin

tL

= Li

neA

= A

rea

S-57

OB

JEC

T C

LASS

C =

Col

lect

'nG

= G

eoM

= M

eta

SPEC

IFIC

S-5

7 A

TTR

IBU

TE

AC

RO

NYM

S(s

ee c

omm

ent)

GEN

ERIC

S-5

7 A

TTR

IBU

TE

AC

RO

NYM

S(s

ee c

omm

ent)

A defined area on land or over water which is patrolled by a controlling or regulatory authority (AML)

authty, catpat, identy, linech, NOBJNM, OBJNAM, NATION, STATUS

AGENCY, CSCALE, elvacc, errell, HORACC, INFORM, NINFOM, NTXTDS, PICREP, POSACC, PRCTRY, PUBREF, RECDAT, QUAPOS, seccvt, secido, secown, secpmk, SORDAT, SORIND, TXTDSC, VERACC

FC031 Maritime AreaMAC = 999 - Other

An area in which certain activities or factors of significance to navigation and/or operation apply.

An area within which naval, military or aerial exercises are carried out. Also called an exercise area. (adapted from IHO Dictionary, S-32, 5th Edition, 1722)

actper, arecat, authty, bverss, CATMPA, depres, dgrhgt, DRVAL1, DRVAL2, DUNITS, HUNITS, identy, linech, maxalt, milact, minalt, mindep, NATION, NOBJNM, OBJNAM, soudat, STATUS, VERDAT




Airspace of defined dimension identified by area on Earth’s surface where activities must be confined because of their nature and/or where limitations may be imposed on aircraft (FACC – Special Use Airspace GA015)

actper, authty, catmea, linech, maxalt, maxftl, minalt, minftl, NOBJNM, OBJNAM, HUNITS, VERDAT


Designated airspace within which some or all aircraft may be subjected to air traffic control (FACC: Airspace – GA005)

authty, catcas, caircd, linech, maxalt, maxftl, minalt, minftl, NOBJNM, OBJNAM, HUNITS, VERDAT


AUB = 43 - Aerodrome Traffic Zone (ATZ)




GA005 Airspaceaua=2

Designated airspace within which some or all aircraft may be subjected to air traffic control.

The airspace above a designated land or water area through which flight is prohibited or restricted (Airspace Reservation – UK MIL AIP GEN-2-2-9)

authty, catasr, linech, maxalt, maxftl, minalt, minftl, NOBJNM, OBJNAM, HUNITS, VERDAT





AUB = 27 - Air-to-Air Refueling Area/Track/Route




GA010 ATS Route Segment/LegATS Use Attribute (AUA 46 - Controlled Airspace )

A portion of an Air Traffic Service (ATS) Route identified by two electronic NAVAIDS at the extremities and/or reporting points.




AUB = 11 - Altimetric Setting Region (ASR)

An area in which vessels anchor or may anchor (IHO Dictionary, S-32, 5th Edition, 130)

CATACH, DATEND, DATSTA, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS


An area of water where vessels anchor or may anchor

bearng, catimg, ELEVAT, HUNITS, orgntr, SUREND, VERDAT





AUL = 17 - Area of Intense Air Activity

A fixed (not afloat) artificial structure between the water and the land. (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATSLC, COLOUR, COLPAT, CONDTN, CONRAD, CONVIS, gradnt, HEIGHT, HORCLR, HORLEN, HORWID, HUNITS, NATCON, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS, VERDAT, VERLEN, WATLEV, wbrcap


DB145 - Miscellaneous Obstacle + exs = 46 - Man-made

Obstacle feature which is of a minor nature and which is not covered by another feature coding in this specification.

An Air Traffic Service (ATS) Route identified by two electronic NAVAIDS at the extremities and/or Waypoint/ Reporting /Calling-in Points (Modified FACC - ATS Route Segment/Leg – GA010)

authty, linech, NOBJNM, OBJNAM


A portion of an Air Traffic Service (ATS) Route identified by two electronic NAVAIDS at the extremities and/or reporting points.




AUL = 22 - Low Flying Avoidance Area

An area of natural scenery on land. It is defined by its geographical characteristics and may be known by its proper name. (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATLND, gradnt, NATQUA, natsed, NOBJNM, OBJNAM, WATLEV


Area between the normal limit of wave action above either Mean High Water Springs (MHWS) or Mean High High Water (MHHW) as defined by the National Authority and the maximum limit of wave action.

A structure for the military defence of a site (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATFOR, CONDTN, CONRAD, CONVIS, HEIGHT, HUNITS, NATCON, NOBJNM, OBJNAM, VERDAT, VERLEN


A relatively permanent structure, roofed and usually walled and designed for some particular use

Composite feature comprising all of the beach information objects for a specific beach





The shore of the sea or lake, sandy or pebbly, brought up by the waves

A geographically defined part of the sea or other navigable waters. It may be specified within its limits by its proper name (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATSEA, gradnt, NOBJNM, OBJNAM


ccmidx, exitus, gradnt, HORCLR, HORLEN, HORWID, HUNITS, VERCSA, wbrcap


A representation of the three dimensional relief of the bottom along a line or series of connected lines. (Adapted from Digital Geographic Information Standard – DIGEST)





accres, brktyp, ccmidx, dgmrlf, HORLEN, HORWID, HUNITS, quabch, orgntr, srfhgt, srfzne, stbacv, SUREND, SURSTA, swlhgt, tdlrng, tdltyp


The shore of the sea or lake, sandy or pebbly, brought up by the waves (including the foreshore area)

A beacon is a prominent specially constructed object forming a conspicuous mark as a fixed aid to navigation or for use in hydrographic survey. (IHO S-32: 420) A cardinal beacon is used in conjunction with the compass to indicate where the mariner may find the best navigable water. It is placed in one of the four quadrants (North, East, South and West), bounded by inter-cardinal bearings from the point marked.

CATCAM, CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, MARSYS, PEREND, PERSTA, STATUS, VERDAT


BC010 BeaconBTC = 1 - Cardinal

A fixed visual or electronic aid to navigation.

A beacon is a prominent specially constructed object forming a conspicuous mark as a fixed aid to navigation or for use in hydrographic survey. (IHO S-32: 420) An isolated danger beacon is a beacon erected on an isolated danger of limited extent which has navigable water all around it. (UKHO NP735, 5th edition)

CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, MARSYS, PEREND, PERSTA, STATUS, VERDAT


BC010 BeaconBTC = 3 - Isolated Danger


I1

NOTES: Attribute acronyms in lower-case type are AML extensions to IHO approved attributes and have been created specifically for AML use. Attribute acronyms in underlined type are IHO approved attributes associated with feature classes other than those defined in S-57, References: IHO Transfer Standard for Digital Hydrographic Data Publication S-57 Edition 3.1 - November 2000 Appendix A - IHO Object Catalogue- Chapters 1 and 2

J1

NOTES: Attribute acronyms in lower-case type are AML extensions to IHO approved attributes and have been created specifically for AML use. Attribute acronyms in underlined type are IHO approved attributes associated with feature classes other than those defined in S-57, References: IHO Transfer Standard for Digital Hydrographic Data Publication S-57 Edition 3.1 - November 2000 Appendix A - IHO Object Catalogue- Chapters 1 and 2

Beacon, lateral Beacon, lateral MFF P BCNLAT 7 G

Beacon, safe water Beacon, safe water MFF P BCNSAW 8 G

Beacon, special purpose Beacon, special purpose MFF P BCNSPP 9 G

Bedrock area Bedrock area Not used MFF A bedare 20490 G N/A N/A N/A N/A N/A Code used in early drafts of Product Specification only - now deletedBerm Bottom Feature ESB P, L, A botmft + catbot 20491 G

Blockhouse Fortified Structure ESB P, A FORSTC + CATFOR 59 G AL015 - Building + bfc=135

Bottom Tactical Data Area Bottom Tactical Data Area Area of defined bottom tactical data. (AML) ESB A btdare 20526 G

Breakwater Shoreline Construction ESB L A SLCONS 122 G BB040 - Breakwater/Groyne

Bridge Bridge ESB L, A BRIDGE 11 G AQ040 Bridge/Overpass/Viaduct

Building, single Building, single ESB P, A BUISGL 12 G AL015 - Building

Built-up Area (ESB) Built-up Area ESB A BUAARE 13 G AL020 - Built-up area

Built-up Area (MFF) Built-up Area MFF P, A BUAARE 13 G AL020 Built-Up Area

Buoy, cardinal Buoy, cardinal MFF P BOYCAR 14 G

Buoy, installation Buoy, installation MFF P BOYINB 15 G

Buoy, isolated danger Buoy, isolated danger MFF P BOYISD 16 G

Buoy, lateral Buoy, lateral MFF P BOYLAT 17 G

Buoy, safe water Buoy, safe water MFF P BOYSAW 18 G

Buoy, special purpose Buoy, special purpose MFF P BOYSPP 19 G

Burial Probability Area Burial Probability Area Area of defined burial probability (AML) ESB A bprare 20527 G

Cable Area Cable Area An area which contains one or more submarine cables. MFF A CBLARE 20 G

Cable Area Cable Area ESB A CBLARE 20 G

Cable, Overhead Cable, Overhead ESB L CBLOHD 21 G AT006 - Overhead Cable

Cable, Submarine Cable, Submarine ESB L CBLSUB 22 G AT005 - Cable

Cable, Submarine Cable, Submarine MFF L CBLSUB 22 G AT005 Cable

Cairn Landmark ESB P LNDMRK + CATLMK 74 G AL025 - Cairn

Castle Fortified Structure ESB P, A FORSTC + CATFOR 59 G AL015 - Building + bfc=4

A beacon is a prominent specially constructed object forming a conspicuous mark as a fixed aid to navigation or for use in hydrographic survey.(IHO S-32: 420) A lateral beacon is used to indicate the port or starboard hand side of the route to be followed. They are generally used for well defined channels and are used in conjunction with a conventional direction of buoyage. (UKHO NP735, 5th edition)

CATLAM, CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, MARSYS, PEREND, PERSTA, STATUS, VERDAT


BC010 BeaconBTC = 5 - Lateral


A beacon is a prominent specially constructed object forming a conspicuous mark as a fixed aid to navigation or for use in hydrographic survey. (IHO S-32: 420) A safe water beacon may be used to indicate that there is navigable water around the mark. (UKHO NP735, 5th Edition)

CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, MARSYS, PEREND, PERSTA, STATUS, VERDAT


BC010 BeaconBTC = 18 - Safe Water


A beacon is a prominent specially constructed object forming a conspicuous mark as a fixed aid to navigation or for use in hydrographic survey.(IHO S-32: 420) A special purpose beacon is primarily used to indicate an area or feature, the nature of which is apparent from reference to a chart, Sailing Directions or Notices to Mariners. (UKHO NP735, 5th edition)

CATSPM, CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, MARSYS, PEREND, PERSTA, STATUS, VERDAT


BC010 BeaconBTC = 15 - Special Purpose


A significant configuration of underwater topography (Adapted from Digital Geographic Information Standard – DIGEST)

catbot, DUNITS, gradnt, HORLEN, HORWID, HUNITS, migspd, migdir, NOBJNM, OBJNAM, ORIENT, soudat, stfotn,VALSOU, VERLEN, WATLEV, wavlen


BD005 - Miscellaneous Underwater feature

An object or area on the sea floor or underwater





mntden, undmnr, umnrwb, umrwob





A structure which protects a harbor or beach from forces of the sea.

A structure erected over a depression or an obstacle such as a body of water, railroad etc. (Adapted from IHO Dictionary S-32, 5th Edition, 544)

CATBRG, COLOUR, COLPAT, CONDTN, CONRAD, CONVIS, DATEND, DATSTA, HORCLR, HUNITS, mlclas, NATCON, NOBJNM, OBJNAM, STATUS, VERCCL, VERCLR, VERCOP, VERDAT, wbrcap


A man-made structure spanning and providing passage over a body of water, depression or other obstacles

A relatively permanent structure , roofed and usually walled. It is designed for some particular use which it may be important to indicate. (Digital Geographic Information Working Group – DGIWG, Oct 87.)

BUISHP, COLOUR, COLPAT, CONDTN, CONRAD, CONVIS, ELEVAT, FUNCTN, HEIGHT, HUNITS, NATCON, NOBJNM, OBJNAM, STATUS, VERDAT, VERLEN



An area containing a concentration of buildings and the supporting road or rail infrastructure (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATBUA, CONDTN, CONRAD, CONVIS, HEIGHT, HUNITS, indtry, OBJNAM, NOBJNM, popltn, VERDAT


An area containing a concentration of buildings and other structures

An area containing a concentration of buildings and the supporting road or rail infrastructure (S-57 Annex A, Appendix A, Chapter 2 Attributes)

CATBUA, CONDTN, CONRAD, CONVIS, HEIGHT, HUNITS, NOBJNM, OBJNAM, VERDAT


An area containing a concentration of buildings and other structures.

A buoy is a floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. (IHO SP-32: 565) A cardinal buoy is used in conjunction with the compass to indicate where the mariner may find the best navigable water. It is placed in one of the four quadrants (North, East, South and West), bounded by inter-cardinal bearings from the point marked. (UKHO NP 735, 5th Edition)

CATCAM, CONRAD, DATEND, DATSTA, MARSYS, PEREND, PERSTA, STATUS


BC020 BuoyBTC = 1 - Cardinal

A floating object, other than a lightship, moored or anchored to the bottom and serving as an aid to navigation.

A buoy is a floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. (IHO SP-32: 565) An installation buoy is a buoy used for loading tankers with gas or oil. (IHO Chart Specifications, M-4)

CATINB, CONRAD, DATEND, DATSTA, MARSYS, PEREND, PERSTA, PRODCT, STATUS


BC020 BuoyBTC = 99 - Installation


A buoy is a floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. (IHO SP-32: 565) An isolated danger buoy is a buoy moored on or above an isolated danger of limited extent which has navigable water all around it. (UKHO NP735, 5th edition)

CONRAD, DATEND, DATSTA, MARSYS, PEREND, PERSTA, STATUS


BC020 BuoyBTC = 3 - Isolated Danger


A buoy is a floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. (IHO SP-32: 565) A lateral buoy is used to indicate the port or starboard hand side of the route to be followed. They are generally used for well defined channels and are used in conjunction with a conventional direction of buoyage. (UKHO NP735, 5th edition)

CATLAM, CONRAD, DATEND, DATSTA, MARSYS, PEREND, PERSTA, STATUS


BC020 BuoyBTC = 5 - Lateral


A buoy is a floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. (IHO SP-32: 565) A safe water buoy may be used to indicate that there is navigable water around the mark. (UKHO NP735, 5th Edition)

CONRAD, DATEND, DATSTA, MARSYS, PEREND, PERSTA, STATUS


BC020 BuoyBTC = 18 - Safe Water


A buoy is a floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. (IHO SP-32: 565) A special purpose buoy is primarily used to indicate an area or feature, the nature of which is apparent from reference to a chart, Sailing Directions or Notices to Mariners. (UKHO NP735, 5th edition)

CATSPM, CONRAD, DATEND, DATSTA, MARSYS, PEREND, PERSTA, STATUS


BC020 BuoyBTC = 15 - Special Purpose


brmchm, brperd, brprob, tgrfwt


CATCBL, DATEND, DATSTA, NOBJNM, OBJNAM, RESTRN, STATUS


FC036 Restricted AreaMAC = 23 - Cable and Pipeline Area

An area in which certain aspects of navigation are restricted.

An area which contains one or more submarine cables. (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATCBL, DATEND, DATSTA, HUNITS, NOBJNM, OBJNAM, STATUS, VERLEN


FC036 mac=20 Restricted Area - Cables

An area in which certain aspects of navigation are restricted

An assembly of wires or fibres, or a wire rope or chain, which is supported by structures such as poles or pylons and passing over or nearby navigable waters. (Hydrographic Service, Royal Australian Navy)

CATCBL, CONDTN, CONRAD, CONVIS, DATEND, DATSTA, ICEFAC, HUNITS, NOBJNM, OBJNAM, STATUS, VERCLR, VERCSA, VERDAT


An insulated wire, or group of wires formed into one continuous strand and located above ground or above water surface

An assembly of wires or fibres, or a wire rope or chain which has been laid underwater or buried beneath the seabed. (Hydrographic Service, Royal Australian Navy)

BURDEP, CATCBL, CONDTN, DATEND, DATSTA, DRVAL1, DRVAL2, DUNITS, HORWID, HUNITS, NOBJNM, OBJNAM, soudat, STATUS, VERLEN


An insulated wire, or group of wires formed into one continuous strand and located underground or underwater

An assembly of wires or fibres, or a wire rope or chain which has been laid underwater or buried beneath the seabed. (Hydrographic Service, Royal Australian Navy)

BURDEP, CATCBL, CONDTN, DATEND, DATSTA, DRVAL1, DRVAL2, DUNITS, HUNITS, NOBJNM, OBJNAM,RESTRN, SOUACC, soudat, STATUS


An insulated wire, or group of wires formed into one continuous strand, located underground or underwater. (See also AT006, AT030 and AT060)

A prominent object at a fixed location which can be used in determining a location or a direction. (Adapted from IHO Dictionary, S-32, 5th Edition, 2643).

CATLMK, COLOUR, COLPAT, CONDTN, CONRAD, CONVIS, ELEVAT, FUNCTN, HEIGHT, HUNITS, NATCON, NOBJNM, OBJNAM, STATUS, VERDAT, VERLEN


A heap of stones piled up as a memorial or a landmark





Cemetery Landmark ESB P LNDMRK + CATLMK 74 G AL030 - Cemetery An area of land for burying the dead.

Centre Line Centre Line Not used ESB L centre 20492 G N/A N/A N/A N/A N/A Code used in early drafts of Product Specification only - now deletedChemical Waste Dumping Ground Dumping Ground ESB A DMPGRD + CATDPG 48 G

Chimney Landmark ESB P LNDMRK + CATLMK 74 G AF010 - Chimney/Smokestack

civil aeroplane airport Airport/Airfield RAL P AIRARE + CATAIR 2 G

civil heliport Airport/Airfield RAL P AIRARE + CATAIR 2 G GB035 Heliport

coast radar station Radar station RAL P RADSTA + CATRAS 102 G

Coastguard station Coastguard station MFF P CGUSTA 29 G

Coastguard track Controlled airspace RAL L, A ctlasp + catcas 20495 G None

Coastline Coastline ESB, MFF L COALNE 30 G BA011 Coastline

Column (Pillar) Landmark ESB P LNDMRK + CATLMK 74 G

A m_conf + catcnf 21484 M catcnf TBD TBD TBD

Conservation and Management Zone Marine management area RAL A marman + catmma 20508 G

Contact Contact Feature appearing mine-like on a sonar image (AML) SBO P contct 20493 G

Contact History Contact History Details of a previous occasion when a contact was found. (AML) SBO P histob 20494 G orgntr, surdat, SUREND

Contiguous Zone Contiguous Zone RAL A, L CONZNE 31 G Geosym 0633 duplicated

Continental Shelf Area Continental Shelf Area RAL A, L COSARE 32 G Geosym 0633 duplicated

Control Area Controlled airspace RAL L, A ctlasp + catcas 20495 G AUA = 8 - Control Area (CTA) Geosym 0761 duplicated

Control Point Control Point ESB P CTRPNT 33 G

Control Zone Controlled airspace RAL L, A ctlasp + catcas 20495 G AUA = 9 - Control Zone (CTLZ) Geosym 0761 duplicated

Controlled Airspace Composite Controlled Airspace Composite RAL N/A C_AGGR 400 C N/A

Conveyor Conveyor ESB L CONVYR 34 G AF020 - Conveyor

Crib Obstruction LBO P OBSTRN + CATOBS 86 G




A sea area where dredged material or other potentially more harmful material, eg. explosives, chemical waste, is deliberately deposited. (Derived from IHO Chart Specifications, M-4)

CATDPG, NOBJNM, OBJNAM, STATUS


FC021 - maritime limit boundary - mac = 30 - dumping ground for hazardous materials

A line where on either side certain activities or factors of significance to navigation and/or operation apply.




A vertical structure containing a passage or flue for discharging smoke and gases of combustion.

An area containing at least one runway, used for landing, take-off, and movement of aircraft. (AML)

actper, authty, CATAIR, ELEVAT, HUNITS, NOBJNM, OBJNAM, rwylen, STATUS, VERDAT,icaocd


GB005 US-Airport/Airfield UK-Airport/Airfield/Airstripuse<>8and<>22 AND exs=28

A defined area of land or water used for landing, take-off, and movement of aircraft including associated buildings and facilities.


actper, authty, CATAIR, ELEVAT, HUNITS, NOBJNM, OBJNAM, rwylen, STATUS, VERDAT, icaocd


A place designated for the landing and take-off of helicopters, including its buildings and facilities.

A station with a transmitter emitting pulses of ultra-high frequency radio waves which are reflected by solid objects and are detected upon their return to the sending station. (International Maritime Dictionary, 2nd Ed.)

actper, authty, CATRAS, NATION, NOBJNM, OBJNAM


AT020 Early Warning Radar SiteRAS = 2 - Coast radar station

An installation utilizing long range radar to detect approaching aircraft or missiles.

Watch keeping stations at which a watch is kept either continuously, or at certain times only. (IHO Chart Specs, M-4)

DATEND, DATSTA, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS


BB155 Maritime Station/Maritime Signal StationSTA = 1 - Coast Guard

A facility occupied by a governmental (maritime related) or harbor authority, providing specific services to vessels. A signal station is a structure (building, tower, mast, etc.), whichconveys information visually from station to ship.




The line where shore and water meet. Although the terminology of coasts and shores is rather confused, shoreline and coastline are generally used as synonyms. (IHO Dictionary, S-32, 5th Edition, 858,4695)

CONRAD, CONVIS, ELEVAT, HUNITS, NOBJNM, OBJNAM, VERDAT


A line generally following the contact between a land mass and a body of water, based on the low water line, and used as a reference for measuring international boundaries such asTerritorial Limits or Exclusive Economic Zone (EEZ). Version 2.1: New Feature to breakout BA010 Coastline/Shoreline.




Completeness for the product specification

Completeness for the product specification

An indication of how complete the dataset is, with reference to the full range of meta data, features and attributes included in the product specification.(AML)

CLB, ESB, LBO, MFF, RAL, SBO


Option 1: Use the dqt constructs:feature_complete attrib_complete comments - to explain non-conformanceorOption 2: Encode the information as area features

Would need to use the dq coverage if there is a requirement to encode areas smaller than a libraryThere are three possible ways of encoding this information:1/ Create a conformance area coverage2/ Create a new area feature table within the hyd coverage3/ Extend the data quality coverage to handle other meta informationAny feedback on the pros and cons of these approaches would be appreciated

An area which is managed and/or monitored by a controlling authority to protect the marine environment and ensure restrictions applicable to that area, or marine activities carried out within the area conform to current legislation/regulations (AML).

actper, authty, catmma, identy, linech, NOBJNM, OBJNAM, NATION, spcies, STATUS




blndzn, brmchm, brpctg, COLOUR, comsys, conshp, contrn, datfir, datlst, depwat, DUNITS, gendep, HORLEN, HORWID, HUNITS, incltn, madsig, magany, magint, miscls, miscom, misdat, misnme, mnhsys, mnssys, mulcon, mwdcrn, NATCON, navsys, nmprob, notfnd, nmprob, onsonr, orbobn, orgdat, orgntr, ORIENT, QUASOU, scrdim, senfir, senlst, snrflc, soudat, stacon, surdat, SUREND, tarstg, TECSOU, unwrfm, VERLEN



A zone contiguous to a coastal State’s territorial sea, which may not extend beyond 24 nautical miles from the baselines from which the breadth of the territorial sea is measured. The coastal state may exercise certain control in this zone subject to the provisions of International Law (IHO Dictionary, S-32, 5th Edition, 993)(For legal definition see UNCLOS Article 33)

linech, DATEND, DATSTA, NATION, STATUS


FC031 Maritime AreaMaritime Area Category (MAC 119 - Contiguous Zone)


The continental shelf of a coastal State comprises the sea bed and subsoil of the submarine areas that extend beyond its territorial sea throughout the natural prolongation of its land territory to the outer edge of the continental margin (as defined by UNCLOS article 76)

linech, NATION, NOBJNM, OBJNAM, STATUS


FC031 Maritime AreaMaritime Area Category (MAC 118 - Continental Shelf Area)





A point on the ground where position (horizontal and vertical) is used as a base for a dependent survey. Also referred to as a control station. (IHO Dictionary S-32, 5th Edition,1026)

CATCTR, DATEND, DATSTA, ELEVAT, HUNITS, NOBJNM, OBJNAM, VERDAT


ZB035 - Control Point/Control Station

An object or mark on the ground of known position, elevation or both




A composite feature comprising one or more areas of Controlled Airspace (AML)

authty, catcas, NOBJNM, OBJNAM


A mechanical apparatus for moving bulk material or people from place to place (as by a moving belt or chain of receptacles) (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATCON, COLOUR, COLPAT, CONDTN, CONRAD, CONVIS, DATEND, DATSTA, HEIGHT, HUNITS, LIFCAP, NOBJNM, OBJNAM, PRODCT, STATUS, VERCLR, VERDAT, VERLEN


An apparatus for moving materials from place to place on a moving belt or series of rollers.

In marine navigation, anything that hinders or prevents movement, particularly anything that endangers or prevents passage of a vessel. The term is usually used to refer to an isolated danger to navigation. (IHO Dictionary, S-32, 5th Edition, 3503)

authty, CATOBS, CONDTN, CONRAD, CONVIS, databa, datfir, datlst, datren, datres, datsnk, datspd, datsus, DUNITS, exzres, fldnam, gendep, HEIGHT, HORLEN, HORWID, HUNITS, madsig, magany, magint, NATCON, NATION, NATSUR, NOBJNM, OBJNAM, oprtor, orcard, ORIENT, PRODCT, QUASOU, scrdim, senfir, senlst, sonsig, sorfir, sorlst, SOUACC, soudat, STATUS, TECSOU,VALSOU, VERDAT, VERLEN, WATLEV


Cross Landmark ESB P LNDMRK + CATLMK 74 G AL116 - Calvary Cross

Current Current ESB L, A CURENT 36 G BG010 - Current Flow The flow direction of a current

Danger Area Airspace Restriction RAL A airres + catasr 20485 G

Data Coverage Data Coverage A M_COVR 302 M CATCOV TBD TBD

Data Source Area Data Source Area A M_CSCL 301 M None

Deep water route – part. Deep water route – part. MFF A DWRTPT 41 G

Deep water route centreline Deep water route centreline MFF L DWRTCL 40 G

Deep water route composite Deep water route composite MFF N/A C_AGGR 400 C NOBJNM, OBJNAM N/A

Depth Area Depth Area CLB L, A DEPARE 42 G BE019 Depth Area hyd

Depth Contour Depth Contour CLB L DEPCNT 43 G BE015 Depth Contour hyd

Diffuser Obstruction LBO P OBSTRN + CATOBS 86 G

Dish Aerial Landmark ESB P LNDMRK + CATLMK 74 G AT010 - Disk/Dish

Diving Location Diving Location Location where civilian diving activities take place. (AML) ESB P, A divloc 20496 G

Dome Landmark ESB P LNDMRK + CATLMK 74 G

Drinking Water Location Drinking Water Location Not used ESB P watloc 20497 G N/A N/A N/A N/A N/A Code used in early drafts of Product Specification only - now deletedDrop Zone Drop Zone ESB P, A drpzne 20498 G

emergency airfield Airport/Airfield RAL P AIRARE + CATAIR 2 G

Environmentally Sensitive Area Environmentally Sensitive Area An area where flora, fauna and physical features are protected (AML) ESB A, P envare 20499 G

Estuary Sea Area ESB A SEAARE + CATSEA 119 G

Exclusive Economic Zone Exclusive Economic Zone RAL A, L EXEZNE 50 G Geosym 0633 duplicated

Explosives Dumping Ground Dumping Ground ESB A DMPGRD + CATDPG 48 G

Fast Patrol Boat Waiting Position Mooring Facility ESB P MORFAC + CATMOR 84 G BB079 - Mooring/Warping Facility

Fault Line Bottom Feature ESB P, L, A botmft + catbot 20491 G DB110 - Fault

Fender Shoreline Construction ESB L A SLCONS 122 G BB198 - Fender




A structure, mounted on a pedestal, composed of an upright member with a shorter horizontal member centered at approximately two thirds of the height of the upright member.

A non-periodical movement of water, generally horizontally, due to many causes such as different temperatures and prevalent winds. May be temporary or permanent. (Adapted from IHO Dictionary S-32, 5th Edition,1140)

CURVEL, OBJNAM, NOBJNM, ORIENT, PEREND, PERSTA





AUA = 10 - Danger AreaAUL = 1 - Danger Area

A geographical area that describes the coverage and extent of spatial objects



ZD020 Void Collection Area: An area lacking suitable source coverage, or where data is not required.

In S57 this meta information is used when two cells overlap. In the area of overlap one of the cells will be empty and this is encoded using a meta object M_COVR.What happens when DIGEST libraries overlap? Is the data duplicated or is it missing in one library?If the latter how is this encoded?

NOTE: It looks as though ZD020 is used in an opposite sort of way to AML Data Coverage.

A geographical area that describes the spatial extent of a data source. (AML)


Listed under generic S-57 attributes. See comments


This feature uses the generic source information attributes to encode source information which is applicable to an area: SORIND =- Source country- Source agency- Source ID- Source typeSORDAT =- Source dateCSCALE =- Source scaleFeatures within the area need not be individually attributed.

A deep water route is a route in a designated area, within defined limits, which has been accurately surveyed for clearance of sea bottom and submerged obstacles to a minimum indicated depth of water. (IHO Dictionary, S-32, 5th Edition, 1280)

DATEND, DATSTA, DRVAL1, DRVAL2, DUNITS, NOBJNM, OBJNAM, ORIENT, QUASOU, RESTRN, SOUACC, soudat, STATUS, TRAFIC


FC166 Deep Water RouteRTT = 99 - Deep Water Route - Part

Complex feature with possible components: FC165 & RTT098, FC165 & RTT099, BC099, BC098.

A deep water route is a route in a designated area, within defined limits, which has been accurately surveyed for clearance of sea bottom and submerged obstacles to a minimum indicated depth of water. (IHO Dictionary, S-32, 5th Edition, 1280) The deep water route centerline indicates the centerline of a route, the width of which is not explicitly defined. (AML)

CATTRK, DATEND, DATSTA, DRVAL1, DRVAL2, DUNITS, NOBJNM, OBJNAM, ORIENT, QUASOU, SOUACC, soudat, STATUS, TRAFIC


FC166 Deep Water RouteRTT = 99 - Deep Water Route - Part

Complex feature with possible components: FC165 & RTT098, FC165 & RTT099, BC099, BC098.

A composite feature which enables the components of a deep water route to be combined into a single feature.(AML)


Water area containing soundings within a defined range of values permanently at or below sounding datum. (FACC Ed2.0a A-81)

DRVAL1, DRVAL2, DUNITS, soudat


A line connecting points of equal water depth which maybe displaced outside of soundings, symbols and other chart detail for clarity as well as generalization. Depth contours therefore sometimes represent an approximate location of the line of equal depth as related to the surveyed line delineated on the source. (adapted from IHO SP-32 Ed5: 1315)

DUNITS, hypcat, soudat, VALDCO








A concave object used for transmitting or receiving electronic signals.

depact, divact, DUNITS, OBJNAM, NOBJNM, timeyr, watclr





Area designated for landing personnel and/or equipment by parachute (AML)

apprch, extdes, lndcon, OBJNAM, NOBJNM, STATUS





GB005 US-Airport/Airfield UK-Airport/Airfield/Airstrip


authty, legsta, OBJNAM, NOBJNM, PEREND, PERSTA





An area, not exceeding 200 nautical miles from the baselines from which the breadth of the territorial sea is measured, subject to a specific legal regime established in the United Nations Convention on the Law of the Sea under which the coastal state has certain rights and jurisdiction. (IHO Dictionary, S-32, 5th Edition, 1723) (For legal definition see UNCLOS Article 55-75)

linech, NATION, STATUS AGENCY, CSCALE, elvacc, errell, HORACC, INFORM, NINFOM, NTXTDS, PICREP, POSACC, PRCTRY, PUBREF, RECDAT, QUAPOS, seccvt, secido, secown, secpmk, SORDAT, SORIND, TXTDSC, VERACC

FC031 Maritime AreaMaritime Area Category (MAC 120 - Exclusive Economic Zone)





FC021 - maritime limit boundary - mac = 35 - explosives dumping ground


The equipment or structure used to secure a vessel (adapted from IHO Dictionary, S-32, 5th Edition, 3322)

CATMOR, commns, logtcs, manvrg, navdes, navdif, pierdn, pierod, seadir, sencov, sfptna, sfptns, sptnnd, surtht, wpncov


A structure used for mooring/warping a ship or as protection for harbor constructions.




A fracture in the Earth's crust with displacement on one side of the fracture relative to the other.




A protective structure designed to cushion the impact of a vessel and prevent damage.

Ferry route Ferry route RAL L, A FERYRT 53 G AQ070 Ferry Crossing

Fish Haven Obstruction LBO P OBSTRN + CATOBS 86 G

Fishing Activity Area Fishing Activity Area Area where fishing activities take place. (AML) ESB A fshare 20500 G catfsh, STATUS, timeyr

Fishing facility Fishing facility ESB P, L, A FSHFAC 55 G BD079 Fishing Facility

Fishing ground Fishing ground MFF A FSHGRD 56 G Centrered point symbol used in S52.

Fishing Zone Fishing Zone RAL A, L FSHZNE 54 G Geosym 0633 duplicated

Flagstaff Landmark ESB P LNDMRK + CATLMK 74 G AL073 - Flagstaff/Flagpole

Flare Stack Landmark ESB P LNDMRK + CATLMK 74 G AB020 - Burner/Flare Stack

Flight Information Region Controlled airspace RAL L, A ctlasp + catcas 20495 G

Foreign Fishing Rights Marine management area RAL A marman + catmma 20508 G

Foreshore Land Region ESB A LNDRGN + CATLND 73 G BA023 - Foreshore

Fort Fortified Structure ESB P, A FORSTC + CATFOR 59 G AL015 - Building + bfc=134

Foul ground Obstruction LBO P OBSTRN + CATOBS 86 G

Free Standing Conductor Pipe Obstruction LBO P OBSTRN + CATOBS 86 G

Geological Layer Geological Layer A homogenous area of rock or sediment. (AML) ESB P, A sedlay 20517 G BF010 - Bottom Characteristics

Ground Tackle Obstruction LBO P OBSTRN + CATOBS 86 G

Groyne Shoreline Construction ESB L A SLCONS 122 G BB040 - Breakwater/Groyne

Harbour area (administrative) Harbour area (administrative) The area over which a harbour authority has jurisdiction. MFF A HRBARE 63 G FA001 Administrative Area

Harbour facility Harbour facility MFF P, A HRBFAC 64 G

Helicopter Main Route Controlled airspace RAL L, A ctlasp + catcas 20495 G AUR = 15 - Helicopter Route Geosym 0761 duplicated

Helicopter Protection Zone Controlled airspace RAL L, A ctlasp + catcas 20495 G Geosym 0761 duplicated

Helicopter Training Area Military exercise airspace RAL A mexasp + catmea 20511 G AUB = 26 - Training Airspace

Helicopter Transit Corridor Controlled airspace RAL L, A ctlasp + catcas 20495 G RTT = 5 - Transit Route Geosym 0761 duplicated

A route in a body of water where a ferry crosses from one shoreline to another. (DGIWG October 1987)

CATFRY, DATEND, DATSTA, DRVAL1, DUNITS, NOBJNM, OBJNAM, PEREND, PERSTA, SOUACC, soudat, STATUS


A route in a body of water where a ferry crosses from one shoreline to another.





A structure in shallow water for fishing purposes which can be an obstruction to ships in general. The position of these structures may vary frequently over time.

CATFIF, HUNITS, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS, VERLEN


A tool in shallow water for fishing purposes which can be an obstruction to ships in general.

A water area in which fishing is frequently carried on. (IHO Dictionary, S-32, 5th Edition, 1814)

NOBJNM, OBJNAM, PEREND, PERSTA, STATUS


FC036 Restricted AreaMAC = 122 - Fishing Ground


The offshore zone in which exclusive fishing rights and management are held by the coastal nation. (IHO Dictionary, S-32, 5th Edition, 1816)

catfsh,linech, NATION, NOBJNM, OBJNAM, spcies, STATUS


FC031 Maritime AreaMaritime Area Category (MAC 121 Fishery Zone)





A staff or pole on which a flag is raised.




A permanent structure used for the disposal of waste products by burning




ATS Use Attribute (AUA 13 - Flight Information Region)









Area between the low water line defined by Mean Low Water Springs (MLWS) or Mean Low Low Water (MLLW) as appropriate and the normal limit of wave action above Mean High Water Springs (MHWS) or Mean High High Water (MHHW) as appropriate.









authty, CATOBS, CONDTN, CONRAD, CONVIS, databa, datfir, datlst, datren, datres, datsnk, datspd, datsus,DUNITS, exzres, fldnam, gendep, HEIGHT, HORLEN, HORWID, HUNITS, madsig, magany, magint, NATCON, NATION, NATSUR, NOBJNM, OBJNAM, oprtor, orcard, ORIENT, PRODCT, QUASOU, scrdim, senfir, senlst, sonsig, sorfir, sorlst, SOUACC, soudat, STATUS, TECSOU,VALSOU, VERDAT, VERLEN, WATLEV


attutn, bulkdn, COLOUR, deplyr, dttdep, dttnum, DUNITS, gascon, grnsiz, hfbmls, laynum, lfbmls, mgstyp, reflco, migspd, migdir, msstrg, natsed, NATQUA, porsty, revebn, revfqy, revgan, samret, sndvel, snrflc, soudat, WATLEV, wbrcap


Designations used on surveys and charts to indicate the consistency, color, and classification


authty, CATOBS, CONDTN, CONRAD, CONVIS, databa, datfir, datlst, datren, datres, datsnk, datspd, datsus, DUNITS, exzres, fldnam, gendep, HEIGHT, HORLEN, HORWID, HUNITS, madsig, magany, magint, NATCON, NATION, NATSUR, NOBJNM, OBJNAM, oprtor, orcard, ORIENT, PRODCT, QUASOU, scrdim, senfir, senlst, sonsig, sorfir, sorlst, SOUACC, soudat, STATUS, TECSOU, VALSOU,VERDAT, VERLEN, WATLEV





A structure which protects a harbor or beach from forces of the sea.

NOBJNM, OBJNAM, STATUS


An area controlled by administrative authority.

A harbour installation with a service or commercial operation of public interest.

CATHAF, CONDTN, DATEND, DATSTA, NATCON, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS


BB005 US-Harbor UK-HarbourFHC Harbor Facility Classification (Tabulates the kind of operation/service.)

A natural or artificial improved body of water providing protection for vessels and anchorage and docking facilities.







AUA = 76 - Helicopter Protection Area







High Intensity Radio Transmission Area Airspace Restriction RAL A airres + catasr 20485 G

Highly Reflective Patch Bottom Feature ESB P, L, A botmft + catbot 20491 G

historic wreck area Restricted Area RAL A RESARE + CATREA 112 G S52 symbol LC(RESARE51) duplicated

Ice Advisory Area Ice Advisory Area RAL A iceadv 20535 G iceadc, NOBJNM, OBJNAM None

Ice Area Ice Area An area of ice over land or water. MFF A ICEARE 66 G BJ065 Ice Shelf

Ice Lead Ice Lead ESB L, A icelea 20541 G

Ice Line Ice Line ESB L icelin 20538 G icelnc, NOBJNM, OBJNAM

Ice Movement Ice Movement ESB P, A icemov 20543 G

Ice Polynya Ice Polynya ESB A icepol 20540 G

Ice Route Ice Route A recommended route through an ice area (ECDIS Ice Objects Version 3.0) RAL L icerte 20539 G NOBJNM,OBJNAM

Iceberg Iceberg ESB P, A icebrg 20542 G

Iceberg Area Iceberg Area ESB A brgare 20536 G icebnm, NOBJNM, OBJNAM

Impact area Military Practice Area RAL A MIPARE + CATMPA 83 G

Impact Scour Impact Scour LBO P iscour 20501 G

Inshore Traffic Zone Inshore Traffic Zone MFF A ISTZNE 68 G

Instrument Flying Area Military exercise airspace RAL A mexasp + catmea 20511 G None

Internal Waters Area Internal Waters Area RAL A intwtr 20533 G Geosym 0633 duplicated

Marine management area RAL A marman + catmma 20508 G

JMC Areas - JENOA grid Military Practice Area RAL A MIPARE + CATMPA 83 G S52 symbol SY(CHINFO06) duplicated

Land area Land area MFF P, L, A LNDARE 71 G DA030 Land Area Centrered point symbol used in S52.

Land Elevation Land Elevation ESB P LNDELV 72 G CA030 - Spot Elevation

Land Ice Land Ice ESB A lndice 20537 G icelnd, NOBJNM, OBJNAM

Landing Area Landing Area ESB A lngare 20502 G

Landing Place Landing Place ESB P lndplc 20503 G gradnt, STATUS, wbrcap BB150 - Landing Place

Landing Point Landing Point A point within a landing site where one helicopter can land. (AML) ESB P lndpnt 20504 G

Landing Site Landing Site A site within a landing zone containing one or more landing points. (AML) ESB A lndste 20505 G

Landing Steps Shoreline Construction ESB L A SLCONS 122 G BB151 - Landing Stairs




AUL = 29 - High Intensity Radio Transmission Area (HIRTA)






A specified area designated by an appropriate authority within which navigation is restricted in accordance with certain specified conditions. (adapted from IHO Dictionary, S-32, 5th Edition, 4366)

actper, authty, CATREA, identy, JRSDTN, linech, NATION, NOBJNM, OBJNAM, RESTRN, STATUS


FC031 Maritime AreaMAC = 34 - Historic Wreck


An area that contains ice conditions hazardous to navigation that the mariner must be aware of. (ECDIS Ice Objects Version 3.0)


CATICE, CONVIS, ELEVAT, HEIGHT, HUNITS, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS, VERDAT, VERLEN


A sheet of thick ice, with level or undulating surface, attached to the land but mostly afloat which is bounded on the seaward side by an Ice Cliff (BJ040).

The Ice Lead identifies any fracture or passage-way through the ice which is navigable by surface vessels. (ECDIS Ice Objects Version 3.0)

icelty, icelst, NOBJNM, OBJNAM


The Ice Line provides a measured, observed or estimated limit of the ice infested waters. (ECDIS Ice Objects Version 3.0)


Ice Movement is the speed and direction of an iceberg, floe or ice area. (ECDIS Ice Objects Version 3.0)

icebsp, icebdr, NOBJNM, OBJNAM


An Ice Polynya is any opening enclosed by ice. It is generally non-linear and generally larger than an Ice Lead or Ice Fracture. A polynya may contain brash ice and/or be covered with new ice, nilas or young ice. (ECDIS Ice Objects Version 3.0)

icepst, icepty, NOBJNM, OBJNAM



FC170 Safety FairwayOrFC165 Route (Maritime)

A route established for the safe passage of vessels through offshore oil and gas fields and minefields.Or.A track or lane established for the safe passage of ships.

An Iceberg is a massive piece of glacial ice, greatly varying in shape, and showing more than 5 metres above the sea surface (ECDIS Ice Objects Version 3.0)

icebsz, icebsh, icebdr, icebsp, NOBJNM, OBJNAM


An area at sea in which icebergs, floebergs, bergy bits or growlers are present. (ECDIS Ice Objects Version 3.0)





FA015 Firing Range/Gunnery RangeFRT = 6 - Impact Area

An open area designated for the purpose of discharging or detonating firearms.

A scour, being a clearing away of mud or other seabed deposits by the action of an object impacting and / or traversing along the seabed before settling. (AML)

datfir, datlst, depwat, DUNITS, gendep, HORLEN, HORWID, HUNITS, NATQUA, NATSUR, NOBJNM, OBJNAM, orcard, ORIENT, QUASOU, senfir, senlst, sonsig, sorfir, sorlst, SOUACC, soudat, STATUS, TECSOU,VALSOU, VERLEN, WATLEV


A routeing measure comprising a designated area between the landward boundary of a traffic separation scheme and the adjacent coast, to be used in accordance with the provisions of the International Regulations for Preventing Collisions at Sea. (IHO Dictionary, S-32, 5th Edition, 2457)

CATTSS, DATEND, DATSTA, RESTRN, STATUS


FC036 Restricted AreaMAC = 41 - Inshore Traffic Zone (TSS)





Waters on the landward side of the baseline of the territorial sea and landlocked waters within the State (IHO Dictionary, S-32, 5th Edition, 2484)(For legal definition see UNCLOS Article 8)

linech, NATION, RESTRN, STATUS


FC031 Maritime AreaMAC = 117 Territorial Sea Area


International Council for the Exploration of the Sea (ICES) fishing Area




FC031 Maritime AreaMAC = 128 - Research Area







The solid portion of the Earth’s surface, as opposed to sea, or water. (IHO SP-32: 2635)

CONDTN, NOBJNM, OBJNAM, STATUS


An area not permanently or temporarily covered by water.

An elevation is the vertical distance of a point or a level, on, or affixed to, the surface of the earth, measured from a specified vertical datum. (IHO Dictionary, S-32, 5th Edition, 1590)

CONVIS, ELEVAT, HUNITS, NOBJNM, OBJNAM, VERDAT


A designated location with an elevation value relative to a vertical datum.

Ice of land origin such as glacier ice, ice shelf or ice tongue (ECDIS Ice Objects Version 3.0)


The general area used for landing troops and stores either by aerial delivery or air landing. This area includes one or more landing/drop zones or landing strips. (AML)



Point on the beach where the landing of troops and vehicles can take place. (AML)


A place on the shore where landing from the sea is possible








Steps at the shoreline as the connection between land and water on different levels.

Landing Strip Landing Strip Area designated for operating fixed wing aircraft. (AML) ESB A lndstp 20506 G

Landing Zone Landing Zone ESB A lndzne 20507 G

Ledge Bottom Feature ESB P, L, A botmft + catbot 20491 G BD119 - Ledge

Leisure Activity Area Leisure Activity Area Area where civilian leisure activities take place (AML) ESB A lsrare 20528 G lsract, timeyr

Light (ESB) Light ESB P LIGHTS 75 G

Light (MFF) Light MFF P LIGHTS 75 G BC040 Light

Light float Light float MFF P LITFLT 76 G

Light vessel Light vessel MFF P LITVES 77 G BC070 Light Vessel/Lightship

Local magnetic anomaly Local magnetic anomaly MFF P, L, A LOCMAG 78 G

Low Flying Area Military exercise airspace RAL A mexasp + catmea 20511 G AUA = 78 - Low Flying Area

Magnetic Anomaly Bottom Feature ESB P, L, A botmft + catbot 20491 G

Magnetic variation Magnetic variation MFF P, L, A MAGVAR 81 G

Manifold Obstruction LBO P OBSTRN + CATOBS 86 G

Marine farm/culture Marine farm/culture MFF P, L, A MARCUL 82 G

Marine Management Area Composite RAL N/A C_AGGR 400 C N/A

Marine management area RAL A marman + catmma 20508 G Geosym 0734 duplicated

Maritime notification area Restricted Area RAL A RESARE + CATREA 112 G S52 symbol LC(RESARE51) duplicated

Marine management area RAL A marman + catmma 20508 G

Maritime Safety Information area Maritime Safety Information area RAL A msiare 20509 G

Martello Tower Fortified Structure ESB P, A FORSTC + CATFOR 59 G AL015 - Building + bfc=136

Mast Landmark ESB P LNDMRK + CATLMK 74 G AQ021 - Mast

MCM Area MCM Area Area where MCM operations have taken place. (AML) ESB A mcmare 20510 G mhclas, milden, nomden

Memorial Plaque Landmark ESB P LNDMRK + CATLMK 74 G

Meta data Data Quality Information N/A M_ACCY 300 M N/A




A specified zone within an objective area used for landing aircraft. This includes a number of landing sites. (AML)






A narrow, flat surface or shelf, especially one that projects as from a wall of rock.


A luminous or lighted aid to navigation. (Adapted from IHO Dictionary, S-32, 5th Edition, 2766).

CATLIT, COLOUR, DATEND, DATSTA, EXCLIT, HEIGHT, HUNITS, LITCHR, LITVIS, MARSYS, MLTYLT, NOBJNM, OBJNAM, ORIENT, PEREND, PERSTA, SECTR1, SECTR2, SIGGRP, SIGPER, SIGSEQ, STATUS, VALNMR, VERDAT


BC050 - lighthouse

BC040 - Light

A distinctive structure exhibiting light(s) designed to serve as an aid to navigation.

A specially constructed device which displays a luminous or lighted aid to navigation.

A luminous or lighted aid to navigation. (Adapted from IHO Dictionary, S-32, 5th Edition, 2766).

CATLIT, COLOUR, DATEND, DATSTA, HEIGHT, HUNITS, LITCHR, MARSYS, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS, VALNMR, VERDAT


A specially constructed device which displays a luminous or lighted aid to navigation. (See also BC050)

A boat-like structure used instead of a light buoy in waters where strong streams or currents are experienced, or when a greater elevation than that of a light buoy is necessary. (IHO Dictionary, S-32, 5th Edition, 2821).

CONRAD, DATEND, DATSTA, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS


BC020 BuoyBUT = 6 - Light Float


A distinctively marked vessel anchored or moored at a charted point, to serve as an aid to navigation. By night, it displays a characteristic light(s) and is usually equipped with other devices, such as fog signal, submarine sound signal, and radio beacon, to assist navigation. Also called light ship. (IHO Dictionary, S-32, 5th Edition, 2828,2829)

CONRAD, DATEND, DATSTA, NOBJNM, OBJNAM, PEREND, PERSTA, STATUS


A distinctively marked manned vessel anchored or moored at a defined point to serve as an aid to navigation.

An anomaly of the magnetic field of the earth, extending over a relatively small area, due to local magnetic influences (IHO SP-32: 2874)

NOBJNM, OBJNAM, VALLMA


ZC040 US-Magnetic Disturbance Area UK-Local Magnetic Anomaly

A localized anomaly in the Earth's magnetic field.







ZC040 - Magnetic Disturbance Area

A localised anomaly in the Earth's magnetic field

The angle between the magnetic and geographic (true) north at a location, expressed in degrees east or west from the direction of true north.

DATEND, DATSTA, RYRMGV, VALACM, VALMAG


ZC040 US-Magnetic Disturbance Area UK-Local Magnetic AnomalyMAG Magnetic Variation - Horizontal angle between true north and magnetic north measured East (positive value) or West (negativevalue) according to whether magnetic north lies east or west of true north.

A localized anomaly in the Earth's magnetic field.




An assemblage of cages, nets, rafts, and floats or posts where fish, including shellfish, are artificially cultivated. Also called fish farm. (IHO SP-32: 1811)

CATMFA, DATEND, DATSTA, depwat, DUNITS, EXPSOU, HUNITS, NOBJNM, OBJNAM, PEREND, PERSTA, QUASOU, RESTRN, SOUACC, soudat, STATUS, VERDAT, VERLEN, WATLEV


BH050 Fish Hatchery/Fish Farm/Marine Farm

An enclosure of water used for the breeding and/or rearing of fish.

Marine Management Area Composite

A composite feature comprising one or more Marine Management areas (AML)

authty, catmma, NOBJNM, OBJNAM


Marine nature Reserve (US Marine Sanctuary)




FC031 Maritime AreaMAC = 101 - Marine Sanctuary







Maritime pollution (MARPOL) reporting grid






An area or region providing details of some form of maritime safety information. (AML)

catmsi, condet, NATION, NOBJNM, OBJNAM









Astraight piece of timber or a hollow cylinder of wood set up vertically, or nearly so.





Encoded as generic attributes. Refer to the following attributes:Absolute Horizontal Accuracy


Listed under generic S-57 attributes


Not an AML feature. M_ACCY used in S-57 implementation only. DIGEST mapping is not required at feature level.Note:Used for non-bathymetric data only

Encoded as generic attributes. Refer to the following attributes:Error Ellipse








Meta data Data Quality Information N/A M_QUAL 308 M N/A

Meta data Data Quality Information N/A M_QUAL 308 M SOUACC N/A

Meta data Data Quality Information N/A M_SREL 310 M N/A

Meta data Data Quality Information N/A M_SREL 310 M QUASOU N/A

Meta data Data Quality Information N/A M_SREL 310 M TECSOU N/A

Meta data Defined Straight Lines MFF, RAL N/A m_line 21487 M linech N/A

Meta data External Reference Information N/A generic generic M N/A N/A

Meta data External Reference Information N/A generic generic M N/A N/A

Meta data External Reference Information N/A M_NPUB 305 M N/A

Meta data External Reference Information N/A M_NPUB 305 M N/A

Meta data Geo-Reference Information N/A M_SDAT 309 M soudat N/A

Meta data Geo-Reference Information N/A M_UNIT 311 M DUNITS, HUNITS N/A

Meta data Geo-Reference Information N/A M_VDAT 312 M VERDAT N/A

Meta data Other Supporting Information N/A generic generic M INFORM, NINFORM N/A N/A

Meta data Production Information N/A M_PROD 307 M N/A



Meta data A m_clas 21485 M N/A




Meta data Source Information N/A M_CSCL 301 M N/A

Meta data Source Information N/A M_CSCL 301 M N/A

Meta data Source Information N/A M_CSCL 301 M CSCALE N/A

Military Aerodrome Traffic Zone Controlled airspace RAL L, A ctlasp + catcas 20495 G Geosym 0761 duplicated

military aeroplane airport Airport/Airfield RAL P AIRARE + CATAIR 2 G

military area Restricted Area RAL A RESARE + CATREA 112 G Geosym 0734 duplicated

military heliport Airport/Airfield RAL P AIRARE + CATAIR 2 G GB035 Heliport

Military Operating Area Military exercise airspace RAL A mexasp + catmea 20511 G

Encoded as generic attributes. Refer to the following attributes:Absolute Vertical Accuracy





Encoded as generic attributes. Refer to the following attributes:Relative Horizontal Accuracy





Encoded as generic attributes. Refer to the following attributes:Relative Vertical Accuracy





Encoded as generic attributes. Refer to the following attribute:Absolute Horizontal Accuracy




Not an AML feature. M_ACCY used in S-57 implementation only. DIGEST mapping is not required at feature level.Note:Used for bathymetric data only

Encoded as generic attributes. Refer to the following attribute:Sounding Accuracy



Not an AML feature. M_ACCY used in S-57 implementation only. DIGEST mapping is not required at feature level.Note:Used for bathymetric data only

Encoded as generic attribute. Refer to the following attribute:Quality of Position




Not an AML feature. M_SREL used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as specific attribute. Refer to the following attribute:Quality of Sounding Measurement




Encoded as specific attribute. Refer to the following attribute:Technique of Sounding Measurement

CLB, ESB, LBO, RAL, SBO



Identifies the geometry applicable to a defined line or lines that are interpolated between two defined points. (AML)


Not an AML feature. m_line used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as generic attribute. Refer to the following attributes:Text File Reference



Not an AML feature. Used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as generic attribute. Refer to the following attributes:Text File Reference (in national language characters)




Encoded as generic attributes. Refer to the following attributes:Image File Link




Not an AML feature. M_NPUB used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as generic attributes. Refer to the following attributes:Reference to a Publication




Not an AML feature. M_NPUB used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as specific attribute. Refer to the following attribute:Sounding Datum



of the sea floor, as determined by sampling methods.

Not an AML feature. M_SDAT used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as specific attributes. Refer to the following attributes:Depth UnitsHeight Units - Length/Width Units



Not an AML feature. M_UNIT used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as specific attribute. Refer to the following attribute:Vertical Datum



Not an AML feature. M_VDAT used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as generic attribute. Refer to the following attribute:Supporting Textual InformationSupporting textual information (in national language characters)



Encoded as generic attributes. Refer to the following attributes:Production Agency




Not an AML feature. M_PROD used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as generic attributes. Refer to the following attributes:Producing Country





Encoded as generic attributes. Refer to the following attributes:Capture Date





Security Classification Information

Encoded as generic attributes. Refer to the following attributes:IDO Status




Not an AML feature. m_clas used in S-57 implementation only. DIGEST mapping is not required at feature level.


Encoded as generic attributes. Refer to the following attributes:Protective Marking






Encoded as generic attributes. Refer to the following attributes:Owner Authority






Encoded as generic attributes. Refer to the following attributes:Caveat





Encoded as generic attributes. Refer to the following attributes:Source Date




Not an AML feature. M_CSCL used in S-57 implementation only. DIGEST mapping is not required at feature level.

Encoded as generic attributes. Refer to the following attributes:Source CountrySource AgencySource IDSource Type




Not an AML feature. M_CSCL used in S-57 implementation only. DIGEST mapping is not required at feature level.The following attributes are concatenated to map as comma separated values of the single attribute SORIND:Source CountrySource AgencySource IDSource Type

Encoded as generic attribute. Refer to the following attribute:Source Scale



Not an AML feature. M_CSCL used in S-57 implementation only. DIGEST mapping is not required at feature level.




AUA = 15 - Military Aerodrome Traffic Zone (MAIZ)




GB005 US-Airport/Airfield UK-Airport/Airfield/Airstripuse=8or22 AND exs=28





FC036 Restricted AreaUSE = 8 - Military





A place designated for the landing and take-off of helicopters, including its buildings and facilities.




AUA = 20 - Military Operations Area (MOA)

Military Practice Area Composite Military Practice Area Composite A composite feature comprising one or more Military Practice areas (AML) RAL N/A C_AGGR 400 C N/A

Military Terminal Control area Military exercise airspace RAL A mexasp + catmea 20511 G Geosym 0761 duplicated

Mine Mine SBO P mindev 20512 G

Mine danger area Restricted Area RAL A RESARE + CATREA 112 G Geosym 0734 duplicated

minefield Restricted Area RAL A RESARE + CATREA 112 G S52 symbol LC(RESARE51) duplicated

Mole Shoreline Construction ESB L A SLCONS 122 G BB042 - Mole

Monument Landmark ESB P LNDMRK + CATLMK 74 G AL130 - Monument

Natural Obstacle Shoreline Construction ESB L A SLCONS 122 G

NAVAID - aeronautical radio beacon Navigation system (NAVAID) RAL P navaid + CATROS 20532 G GA035 NAVAIDS (Aeronautical)

NAVAID - directional radiobeacon Navigation system (NAVAID) RAL P navaid + CATROS 20532 G GA035 NAVAIDS (Aeronautical)

Navigation system (NAVAID) RAL P navaid + CATROS 20532 G GA035 NAVAIDS (Aeronautical)

Navigation system (NAVAID) RAL P navaid + CATROS 20532 G


NAVAID - Locator (LO) Navigation system (NAVAID) RAL P navaid + CATROS 20532 G GA035 NAVAIDS (Aeronautical)







Nearshore Sea Area ESB A SEAARE + CATSEA 119 G BA021 Nearshore

Night Flow Area (NFA) - Fixed Wing Military exercise airspace RAL A mexasp + catmea 20511 G

Night Flow Area (NFA) - Rotary Wing Military exercise airspace RAL A mexasp + catmea 20511 G

Nuclear Waste Dumping ground Dumping Ground ESB A DMPGRD + CATDPG 48 G

Obelisk Landmark ESB P LNDMRK + CATLMK 74 G

authty, catpat, NOBJNM, OBJNAM





AUA = 21 - Military Terminal Control Area (MTCA)

An explosive device used in naval warfare located on or below the sea. (Digital Geographic Information Working Group – DGIWG, Oct.87)

blndzn, brmchm, brpctg, COLOUR, comsys, datfir, datlst, depwat, DUNITS, gendep, HUNITS, incltn, layptm, layrfn, laytim, madsig, magany, magint, minern, miscls, miscom, misdat, misnme, mnhsys, mnimnc, mnimnt, mnssys, mwdcrn, navsys, notfnd, nmprob, onsonr, orbobn, orgdat, orgntr, ORIENT, QUASOU, scrdim, senfir, senlst, snrflc, soudat, stacon, surdat, SUREND, tarstg, TECSOU, unwrfm, VERLEN





FC031 Maritime AreaMAC = 4 - Mine Danger Area










A loading and discharge place for vessels. It is usually a substantial masonry structure, and often serves as a breakwater on its outer side while offering facilities for ships in its inner side.




A structure erected or maintained as a memorial to a person or event.




DB145 - Miscellaneous Obstacle + exs = 45 - Natural

Obstacle feature which is of a minor nature and which is not covered by another feature coding in this specification.

Any visual or electronic device which provides point-to-point guidance information or position data (FACC - NAVAIDS (Aeronautical) GA035.

actper, CALSGN, CATROS, COMCHA, NOBJNM, OBJNAM, SIGFRQ


Any visual or electronic device which provides point-to-point guidance information or position data.





NAVAID - Distance Measuring Equipment (DME)





NAVAID - Distance Measuring Equipment (DME)/VHF Omni Directional Radio Range (VOR)




GA035 NAVAIDS (Aeronautical) nst=21


NAVAID - Localiser/Distance Measuring Equipment (LOC/DME)









NAVAID - Non-directional Radio Beacon (NDB)






NAVAID - Radar Responder Beacon (RACON)





NAVAID - Radar Responder Beacon (RAMARK)





NAVAID - Tactical Air Navigation Equipment (TACAN)






NAVAID - VHF Omni Directional (VORTAC)






NAVAID - VHF Omni Directional Radio Range (VOR)












AUB = 69 - Low Flying Flow Corridor Boundary




AUB = 69 - Low Flying Flow Corridor Boundary




FC021 - maritime limit boundary - mac = 30 - dumping ground for hazardous materials





Obstruction Obstruction MFF L,A OBSTRN 86 G BD070 Obstruction (Nautical)

Ocean Control Area Controlled airspace RAL L, A ctlasp + catcas 20495 G Geosym 0761 duplicated

Offshore platform Offshore platform MFF P, A OFSPLF 87 G BD110 Platform

Offshore production area Offshore production area An area at sea within which there are production facilities. MFF A OSPARE 88 G

offshore safety zone Restricted Area RAL A RESARE + CATREA 112 G

Open Face Wharf Shoreline Construction ESB L A SLCONS 122 G

Operational/Naval Patrol Patrol area RAL A patare + catpat 20513 G

Patrol Area Composite Patrol Area Composite A composite feature comprising one or more Patrol Areas (AML) RAL N/A C_AGGR 400 C N/A

Performance Data Area Performance Data Area Area of defined performance data. (AML) ESB A pfdare 20529 G

Pier (Jetty) Shoreline Construction ESB L A SLCONS 122 G BB190 - Pier/wharf/quay

Pipeline Area Pipeline Area ESB A PIPARE 92 G

Pipeline area Pipeline area An area containing one or more pipelines. MFF P, A PIPARE 92 G MAC = 21 - Pipeline Area

Pipeline Obstruction Obstruction LBO P OBSTRN + CATOBS 86 G

Pipeline, Overhead Pipeline, Overhead ESB L PIPOHD 93 G

Pipeline, submarine/on land Pipeline, submarine/on land ESB L PIPSOL 94 G AQ113 - Pipeline

Pipeline, submarine/on land Pipeline, submarine/on land MFF P, L PIPSOL 94 G AQ113 Pipeline/Pipe

Pockmark Bottom Feature ESB P, L, A botmft + catbot 20491 G

Pontoon Obstruction LBO P OBSTRN + CATOBS 86 G

port Administration area (named) A defined (and possibly named) administrative area MFF P, A ADMARE + catadm 1 G BB005 US-Harbor UK-Harbour

practice and exercise area Military Practice Area RAL A MIPARE + CATMPA 83 G S52 symbol SY(CHINFO06) duplicated

Precautionary Area Precautionary Area MFF A PRCARE 96 G

Production/storage area Production/storage area An area on land for the exploitation or storage of natural resources. MFF P, A PRDARE 97 G AM010 Depot (Storage)

In marine navigation, anything that hinders or prevents movement, particularly anything that endangers or prevents passage of a vessel. (IHO Dictionary, S-32, 5th Edition, 3503)(See comment)

CATOBS, CONDTN, depwat, DUNITS, EXPSOU, HEIGHT, HUNITS, NATCON, NOBJNM, OBJNAM, QUASOU, SOUACC, soudat, STATUS,VERLEN, WATLEV


A danger to navigation, the exact nature of which is not specified, or has not been determined.

(Note: only obstructions of a general nature, as defined in the attribute 'Category of obstruction' , shall be captured, providing they cover a significant area of the seabed. Any type of obstruction which can be positioned using a single co-ordinate, or can be adequately represented by a centralised position (point geometry) must be captured in either the AML product “Large Bottom Objects” or “Small Bottom Objects” as appropriate.)




AUA = 23 - Oceanic Control Area (non-FAA) (OCA)AUA = 70 - Oceanic Control Area (FAA) (OCA)

A permanent offshore platform, either fixed or floating, used in the production of oil or natural gas. (IHO SP-32: 3895)

authty, CATOFP, CONDTN, CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, limanc, NATCON, NATION, NOBJNM, OBJNAM, PRODCT, STATUS, VERDAT


A flat surface raised above the sea, as a working stage for conducting offshore operations.

authty, CATPRA, CONDTN, CONRAD, DATEND, DATSTA, HEIGHT, HUNITS, NATION, NOBJNM, OBJNAM, PRODCT, RESTRN, STATUS, VERDAT


MAC = 98 - Offshore Production Area




FC031 Maritime AreaMAC = 37 - Safety Zone





BB190 - Pier/wharf/quay + fac = 1 - open

A structure primarily used as berthing places for vessels.

A defined area on land or over water which is patrolled by a controlling or regulatory authority (AML)

authty, catpat, identy, linech, NOBJNM, OBJNAM, NATION, STATUS


FC031 Maritime AreaMAC = 143 - Naval Operations Area


authty, catpat, NOBJNM, OBJNAM


clperc, clprob, csprob, cswidt, dsprob, dtprob





A structure primarily used as berthing places for vessels.

An area containing one or more pipelines. (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATPIP, CONDTN, DATEND, DATSTA, HUNITS, NOBJNM, OBJNAM, PRODCT, STATUS, VERLEN


FC036 + mac=21 Restricted Area - Pipeline Area

An area in which certain aspects of navigation are restricted

CATPIP, CONDTN, DATEND, DATSTA, NOBJNM, OBJNAM, PRODCT, RESTRN, STATUS



authty, CATOBS, CONDTN, CONRAD, CONVIS, databa, datfir, datlst, datren, datres, datsnk, datspd, datsus, DUNITS, exzres, fldnam, gendep, HEIGHT, HORLEN, HORWID, HUNITS, madsig, magany, magint, NATCON, NATION, NATSUR, NOBJNM, OBJNAM, oprtor, orcard, ORIENT, PRODCT, QUASOU, scrdim, senfir, senlst, sonsig, sorfir, sorlst, SOUACC, soudat, STATUS, TECSOU,VALSOU,VERDAT, VERLEN, WATLEV


An overhead pipeline is a pipeline supported by pylons and passing over or nearby navigable waters (S-57 Annex A, Appendix A, IHO Object Catalogue)

CATPIP, CONDTN, CONRAD, CONVIS, DATEND, DATSTA, HUNITS, NOBJNM, OBJNAM, PRODCT, STATUS, VERCLR, VERDAT


AQ113 + loc = 25 - Pipeline - suspended or elevated above ground or water surface

A tube for the conveyance of solids, liquids or gases.

A pipeline is a string of interconnected pipes used for the transport of matter, nowadays mainly oil or gas. (IHO Dictionary, S-32, 5th Edition, 3857) A submarine or land pipeline is a pipeline lying on or buried under the seabed or the land. (AML)

BURDEP, CATPIP, CONDTN, DATEND, DATSTA, DRVAL1, DRVAL2, DUNITS, HORWID, HUNITS, NOBJNM, OBJNAM, PRODCT, soudat, STATUS, VERLEN



A pipeline is a string of interconnected pipes used for the transport of matter, nowadays mainly oil or gas. (IHO Dictionary, S-32, 5th Edition, 3857) A submarine or land pipeline is a pipeline lying on or buried under the seabed or the land. (AML)

BURDEP, CATPIP, CONDTN, DATEND, DATSTA, DRVAL1, DRVAL2, DUNITS, HUNITS, NOBJNM, OBJNAM, PRODCT, RESTRN, SOUACC, soudat, STATUS, VERLEN











JRSDTN, NATION, NOBJNM, OBJNAM


A natural or artificial improved body of water providing protection for vessels and anchorage and docking facilities.




FC031 Maritime AreaMAC = 91 - Practice area in generalMAC = 140 - Exercise Area Limit


A routeing measure comprising an area within defined limits where ships must navigate with particular caution and within which the direction of traffic flow may be recommended. (IHO Dictionary, S-32, 5th Edition, 3982)

DATEND, DATSTA, RESTRN, STATUS, OBJNAM, NOBJNM


CATPRA, CONDTN, CONRAD, CONVIS, DATEND, DATSTA, ELEVAT, HEIGHT, HUNITS, NOBJNM, OBJNAM, PRODCT, STATUS, VERDAT, VERLEN


An area used for the storage of products or supplies. (See also AB000)

S-57

CO

DE

S-57 ATTRIBUTE VALUES (CODES, DESCRIPTIONS AND/OR FORMATS)

DIG

EST

FAC

C

COMMENTS

Access Restriction Restrictions on access to the beach from the sea. (AML) S ESB accres 20617 Text string S

Active period S RAL actper 20670 Text string S

Production Agency S AGENCY 1 IHO code for producing agencies A S-57 Attribute Generic AML Attribute

Approach S ESB apprch 20618 Text string S

Area Category Area category I RAL arecat 20687 E

Attenuation R ESB attutn 20485 decibels/metre F

Controlling authority S authty 20516 Text string S

Bearing R bearng 20487 degrees F

Blind Zone Pair(s) of bearings that define the blind zone (AML) S SBO blndzn 20488 A

Breaker Type Type of wave breaking on the shore. (AML) I ESB brktyp 20489 E

Burial Mechanism I brmchm 20491 E

Burial Percentage I SBO brpctg 20492 The burial percentage should be encoded using an integer numeric value I

Burial Period Time likely to be taken to achieve burial. (AML) I brperd 20493 Hours I

Burial Probability I brprob 20494 E

Building Shape Describes the specific shape of a building. S ESB BUISHP 3 E S-57 Attribute

Density R ESB bulkdn 20490 kilograms/metre F

Buried Depth R BURDEP 5 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Bottom Vertical Safety Separation I RAL bverss 20675 The Bottom Vertical Safety Separation percentage should be encoded using an integer numeric value I

Controlled airspace class designation I RAL caircd 20515 E

Call Sign The designated call sign of a radio station. S RAL CALSGN 6 Text string S S-57 Attribute

Category of Tidal Stream Category of Tidal Stream I MFF CAT_TS 188 E S-57 Attribute

Type of Anchorage Type of Anchorage I ESB CATACH 8 E S-57 Attribute

REAL WORLD OBJECT ATTRIBUTESNote: AML codes have been derived from the first non-standard No. available (16388) plus 4096Feature Attributes from 20484Spatial and Meta-object Attributes from 22484 (20484+2000)

AML ATTRIBUTE DESCRIPTIONProduced by the United Kingdom Hydrographic Office 26/07/04© British Crown Copyright 2004

AM

L A

TTR

IBU

TE

FOR

MA

TI =

Inte

ger

R =

Rea

lS

= S

tring

AM

LSP

EC(S

)

S-57

AC

RO

NYM

(see

com

men

t)

S-57

ATT

RIB

UTE

TY

PEA

= C

oded

Stri

ngE

= E

num

erat

edF

= Fl

oat

I = In

tege

rL

= Li

stS

= S

tring

AM

L/S-

57

ATT

RIB

UTE

STA

TUS

DIG

EST

FAC

C

DES

CR

IPTI

ON

new feature attribute

Details of the operating times/dates that restrict when an object is active or in use (AML).


The agency responsible for the production of the data (AML)


Description of approach including direction and potential hazards. (AML)


501 = Solid Red (SR): The area is a scheduled Danger Area; for firings wholly within the area and within specified times, a Notice to Airmen (NOTAM) is not required (AML).502 = Pecked Red (PR): The area is a Notified Danger Area; for firings and other potentially hazardous activities, a Notice to Airmen (NOTAM) is required (AML).701 = Unknown:703 = Not Applicable:704 = Other:


Reduction in intensity of sound waves (Adapted from IHO-Dictionary S-32, 5th Edition, 292)


The recognised authority responsible for establishing and maintaining the administrative affairs of all matters relating to a particular field or subject. (AML)

ESB, LBO, MFF, RAL


The horizontal direction of one terrestrial point from another, expressed as the angular distance from a reference direction. (IHO Dictionary, S-32, 5th Edition, 435)

SBO, ESB


The blind zone data should be encoded using a floating point numeric value for each bearing that defines the blind zone. The second bearing will be in a clockwise direction from the first bearing.


The figures describing each value shall be separated by a comma. Multiple blind zones will be represented by repeated pairs of these values

501 = Spilling: The wave becomes unstable at the crest and forms white water. The white water expands slowly down the front face of the breaker. Breaking action is mild. (AML)502 = Plunging: The wave crest advances so much faster than the base of the wave that it falls almost into the trough with a violent action. White water appears almost instantly over the entire front. (AML)503 = Surging: The wave crest tends to advance faster than the base of the wave, but, before breaking completely, the wave base advances faster than the crest and the plunging is arrested. (AML)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


The method by which a object has or could become buried. (AML)

SBO, ESB

501 = Impact: The object has become buried by the force of the object hitting the sediment. (AML)502 = Scour: The object has become buried by the action of current or flow of water around the object.(AML)503 = Liquefaction: The object has become buried by the process whereby under certain conditions, a solid seafloor sediment behaves as a liquid. (AML)504 = Sandwave Migration: The object has become buried by the movement of sandwaves. (AML)505 = Sediment Migration: The object has become buried by the movement of sediment. (AML)701 = Unknown: The mechanism of burial is unknown. (AML)702 = Multiple:703 = Not Applicable:704 = Other:


The percentage of the object that has become buried. (AML)


SBO, ESB


The likelihood of subsequent burial and its estimated rate (AML)

SBO, ESB

501 = A: Burial unlikely. (AML)502 = B: Partial burial taking more than 7 days. (AML)503 = C: Partial burial taking between 24 hours and 7 days. (AML)504 = D: Partial burial taking less than 24 hours. (AML)505 = E: Total burial taking more than 7 days. (AML)506 = F: Total burial taking between 24 hours and 7 days. (AML)507 = G: Total burial taking less than 24 hours. (AML)701 = Unknown:703 = Not Applicable:


1 = no specific shape: 2 = tower: 3 = spire: 4 = cupola (dome): 5 = high rise building: A building having many storeys. (The New Shorter Oxford English Dictionary, 1993)6 = pyramid: A polyhedron of which one face is a polygon of any number of sides, and the other faces are triangles with a common vertex. (The New Shorter Oxford English Dictionary, 1993)7 = cylindrical: Shaped like a cylinder, which is a solid geometrical figure generated by straight lines fixed in direction and describing with one of its points a close curve, especially a circle. (The New Shorter Oxford English Dictionary, 1993)8 = spherical: Shaped like a sphere, which is a body the surface of which is at all points equidistant from the centre. (The New Shorter Oxford English Dictionary, 1993)9 = cubic: A shape the sides of which are six equal squares; a regular hexahedron. (The New Shorter Oxford English Dictionary, 1993)701 = Unknown:703 = Not Applicable:704 = Other:

The proportion of a mass to its bulk or volume. (Chambers Concise Dictionary)


The depth below the sea bed to which an object is buried. (S-57 Annex A, Appendix A)

ESB, MFF

A percentage value that can be applied to a charted depth in order to establish the BVSS clearance (AML)


Air traffic services and rules of operation (e.g. instrument (IFR), and, visual (VFR), flight rules etc.) that are applicable to the controlled airspace, as defined by the governing aviation authority and in accordance with ICAO standards (AML)

Generic definition:airspace of defined dimensions, alphabetically designated Class A-G, within which specific typres of flights may operate and for which air traffic services and rules of operation are specified. (UK MIL APD GEN-2-2-9)501 = A: 502 = B503 = C: 504 = D: 505 = E: 506 = F: 507 = G:701 = Unknown:703 = Not Applicable:704 = Other:


For details refer to: CAA Chart series GSGS 5201C, sheet UK ATS Airspace Classifications, edition 4 - GSGS

Generic definition: Airspace of defined dimensions, alphabetically designated Class A- G, within which specific types of flights may operate and for which air traffic services and rules of operation are specified (UK MIL AIP GEN-2-2-9)

1 = flood stream: the horizontal movement of water associated with the rising tide. Flood streams generally set towards the shore, or in the direction of the tide progression. Also called flood, flood current or ingoing stream. (Adapted from IHO Dictionary, S-32, 5th Edition)2 = ebb stream: the horizontal movement of water associated with the falling tide. Ebb streams generally set seaward, or in the opposite direction to the tide progression. Also called ebb, ebb current or outgoing stream. (Adapted from IHO Dictionary, S-32, 5th Edition)3 = Other tidal flow: any other horizontal movement of water associated with tides, e.g. rotary flow701 = Unknown:703 = Not Applicable:

1 = unrestricted anchorage: An area in which vessels anchor or may anchor. (IHO Dictionary, S-32, 5th Edition, 130)2 = deep water anchorage: An area in which vessels of deep draught, anchor or may anchor. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = tanker anchorage: An area in which tankers anchor or may anchor. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = explosives anchorage: An area set apart for anchored ships discharging or receiving explosives. (IHO Dictionary, S-32, 5th Edition, 1732)5 = quarantine anchorage: An area where a vessel anchors when satisfying quarantine regulations. (IHO Dictionary, S-32, 5th Edition, 4117)6 = sea-plane anchorage: An area in which sea-planes anchor or may anchor. (S-57 Annex A, Appendix A, IHO Object Catalogue)7 = small craft anchorage: An area in which small boats anchor or may anchor. (S-57 Annex A, Appendix A, IHO Object Catalogue)8 = small craft mooring area: An area in which yachts and small boats moor. (S-57 Annex A, Appendix A, IHO Object Catalogue)9 = anchorage for periods up to 24 hours: An area in which vessels anchor or may anchor for periods of up to 24 hours. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:

A B C D E F G H I J K L

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

E1

NOTES: Attribute acronyms in lower-case type are AML extensions to IHO approved attributes and have been created specifically for AML use. References: IHO Transfer Standard for Digital Hydrographic Data Publication S-57 Edition 3.1 - November 2000 Appendix A - IHO Object Catalogue- Chapters 1 and 2

Category of administration area Category of administration area. I MFF catadm 20496 E redundant at v2.0

Category of Airport/airfield Category of Airport/airfield S RAL CATAIR 7 L

Category of airspace restriction Category of airspace restriction I RAL catasr 20497 E

Category of Beach I ESB catbch 20619 E

Bottom Feature Classification I ESB catbot 20499 E

Bridge Classification Bridge Classification S ESB CATBRG 9 L S-57 Attribute

Type of Built-up Area Type of Built-up Area I CATBUA 10 E S-57 Attribute

Category of Cardinal Mark Category of Cardinal Mark I MFF CATCAM 13 E S-57 Attribute

Category of controlled airspace I RAL catcas 20501 E

Type of Cable Type of Cable I CATCBL 11 E

Category of coastguard station Category of coastguard station I MFF catcgs 20500 E redundant at v2.0

Category of Checkpoint Category of Checkpoint I RAL CATCHP 14 E

Category of completeness I catcnf 22484 E

Category of Coastline Category of Coastline I ESB CATCOA 15 E S-57 Attribute

Type of Conveyor Type of Conveyor I ESB CATCON 17 E S-57 Attribute

Category of Coverage The availability of coverage. (AML) S CATCOV 18 E S-57 Attribute

Class of Control Point Class of Control Point I ESB CATCTR 16 E S-57 Attribute

501 = port: A place provided with terminal and transfer facilities for loading and discharging cargo or passengers, usually located in a harbour. (IHO SP-32, Ed5: 3950)502 = territorial land area: A region or portion of land belonging to a state or confederation; a district over which an authority extends. (Adapted from Chambers Concise Dictionary)


1 = military aeroplane airport: a large military airfield usually equipped with a control tower, hangars and accommodation for the receiving and discharging of passengers or cargo. (adapted from The Macquarie Dictionary, 1988)2 = civil aeroplane airport: a large airfield usually equipped with a control tower, hangars and accommodation for the receiving and discharging of passengers or cargo. (The Macquarie Dictionary, 1988)3 = military heliport: a landing place for helicopters controlled by the military.4 = civil heliport: a landing place for helicopters, often the roof of a building. (The Macquarie Dictionary, 1988)5 = glider airfield: an area of land set aside for the take-off and landing of gliders.6 = small planes airfield: an area of land set aside for the take-off and landing of small aeroplanes.8 = emergency airfield: an area of land set aside for the take-off and landing of aeroplanes or helicopters in times of emergency. (AML)501 = Search and Rescue: an airfield that is equipped with search and rescue aircraft and facilities (AML)701 = Unknown:702 = Multiple:703 = Not Applicable:

Existing S-57 Attribute with

additional values

501 = Danger Area: An airspace of defined dimensions within which activities dangerous to the flight of an aircraft may exist at specified times. Military flights within danger areas are permitted only in the following circumstances; When access is necessary to enable the pilot to perform the duty for which the flight was authorised. When the pilot is flying in accordance with the ATV procedures approved for the penetration of the area. (UK AIP (ENR) 1.3)502 = Prohibited Area: An airspace of defined dimensions, above the land or territorial waters of a State, within which the flight of aircraft is prohibited - (UK AIP (ENR) 1.1.2) (UK MIL AIP GEN-2-2-13)503 = Restricted Area: An airspace of defined dimensions, above the land or territorial waters of a State, within which the flight of aircraft is restricted in accordance with certain specified conditions - (UK AIP (ENR) 1.1.3) (UK MIL AIP GEN-2-2-13)504 = HIRTA: High Intensity Radio Transmission Area. An airspace of defined dimensions within which there is radio energy at intensity levels which may affect weapons systems and interfere with or on occasion, cause damage to communications and navigation equipment. (AML)505 = Provost Marshall Prohibited Area (PMPA): An airspace of defined dimensions established by the RAF provost Marshal within which the flight of military aircraft is prohibited


Suitability of the beach for certain types of landing craft. (AML)

501 = green: Also known as Category A, suitable for LSLs and smaller. 502 = Yellow: Also known as Category B, suitable for LCMs and smaller.503 = Red: Also known as Category C, suitable for minor craft only.701 = Unknown:703 = Not Applicable:704 = Other:


Classification of naturally occurring bottom features on the seabed. (AML)

501 = Berm: A narrow, raised embankment along a beach formed by the deposit of material by waves and marks the limit of high tides. (Adapted from IHO Hydrographic Dictionary, S-32, 5th Edition, 468)502 = Fault Line: A break of shear in the earth's crust with an observable displacement between the two sides of the break, and parallel to the end of the break. (IHO Hydrographic Dictionary, S-32, 5th Edition 1778)503 = Highly Reflective Patch: Highly reflective patch of seabed found by side scan, no contact found using MM sonar. (AML)504 = Ledge: A rocky formation continuous with and fringing the shore. (IHO Hydrographic Dictionary, S-32, 5th Edition, 2707)505 = Magnetic Anomaly: An anomaly of the magnetic field of the earth, extending over a relatively small area, due to local magnetic influences. (IHO Hydrographic Dictionary, S-32, 5th Edition, 2874)506 = Pockmark: Small depression on the seabed. (AML)507 = Ridge: A long narrow elevation with steep sides. (IHO Hydrographic Dictionary, S-32, 5th Edition 4388)508 = Ripple: Undulating surface feature of varying shape produced in unconsolidated sediments by wave or current action. (Adapted from IHO Hydrographic Dictionary, S-32, 5th Edition, 4398)509 = Runnel: A trough or corrugation formed in the foreshore or in the bottom, immediately offshore, formed by waves or tidal currents. (IHO Hydrographic Dictionary, S-32, 5th


1 = fixed bridge: A bridge having permanent horizontal and vertical alignment. (McGraw-Hill Dictionary of Scientific and Technical Terms, 3rd Edition, 1984)2 = opening bridge: A bridge that is closed when set for carrying road traffic and open when set to permit marine traffic to pass through the waterway it crosses. (Adapted from McGraw-Hill Encyclopedia of Science and Technology 7th Edition, 1992)3 = swing bridge: A movable bridge (or span thereof) which rotates in a horizontal plane about a vertical pivot to allow the passage of vessels. (Adapted from McGraw-Hill Encyclopedia of Science and Technology 7th Edition, 1992) 4 = lifting bridge: A movable bridge (or span thereof) which is capable of being lifted vertically to allow vessels to pass beneath. (Adapted from IHO Dictionary, S-32 5th Edition, 547)5 = bascule bridge: A counterpoise bridge rotated in a vertical plane about an axis at one or both ends. Also called a balance. (IHO Dictionary S-32, 5th Edition, 545)6 = pontoon bridge: A fixed floating bridge supported by pontoons. (McGraw-Hill Dictionary of Scientific and Technical Terms, 3rd Edition, 1984)7 = draw bridge: A general name for bridges of which part or the entire span of the bridge may be raised or drawn aside to allow ships to pass through. (IHO Dictionary S-32, 5th Edition, 546)8 = transporter bridge: A bridge that has towers on each side of the waterway connected by a girder system on which a carriage runs. (IHO Chart Specifications, M-4, 381.2)9 = footbridge: A bridge structure used only for pedestrian traffic. (McGraw-Hill Dictionary of Scientific and Technical Terms, 3rd Edition, 1984)

ESB, MFF

1 = urban area: An area predominantly occupied by man-made structures used for residential, commercial and industrial purposes. (Nautical Chart Manual, US Department of Commerce, 1992)2 = settlement: A small collection of dwellings in a remote area. 3 = village: A collection of houses in a rural area, usually smaller than a town. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = town: Any considerable collection of dwellings and other buildings larger than a village, but not incorporated as a city.(S-57 Annex A, Appendix A, IHO Object Catalogue) 5 = city: A major town inhabited by a large permanent community with all essential.(S-57 Annex A, Appendix A, IHO Object Catalogue) 6 = holiday village: A collection of smaller houses (cottages, mobile homes etc.) which is mainly populated on a seasonal basis. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:703 = Not Applicable:704 = Other:

1 = north cardinal mark: 2 = east cardinal mark: 3 = south cardinal mark: 4 = west cardinal mark: 701 = Unknown:703 = Not Applicable:The four quadrants (north, east, south and west) are bounded by the true bearings NW-NE, NE-SE, SE-SW and SW-NW taken from the point of interest.A cardinal mark is named after the quadrant in which it is placed.The name of the cardinal mark indicates that it should be passed to the named side of the mark

Cardinal Marks do not have a distinctive shape but are normally pillar or spar. They are always painted in yellow and black horizontal bands and their distinctive double cone topmarks are always black.

Air Traffic Services airspace classifications, applicable to the ATS airspace, as defined by the governing aviation authority and in accordance with ICAO standards

501 = Airway: a control area or portion thereof established in the form of a corridor equipped with radio navigation aids (UK MIL APD - GEN-2-2-9)502 = Altimeter Setting Region (ASR): a geographical region for which the lowest value of QNH is forecast hourly by a Forecasting Office and relayed by Air Traffic Control Centres (UK MIL APD - GEN-2-2-9)503 = Avoidance Area (AA): areas that pilots must avoid during specified periods in which activity, or activities, considered a hazard to flight may exist. They have been established to prohibit low flying over areas of high population density and in certain types of regulated airspace (AML)504 = Control Area (CTA): a controlled airspace extending upwards from a specified height above the earth. (UK MIL APD GEN-2-2-9)505 = Control Zone (CTR/CTZ): a controlled airspace extending upwards from the surface of the earth to a specified upper limit. (UK MIL APD GEN-2-2-10) 506 = Flight Information Region (FIR): an airspace of defined dimensions within which flight information and alerting services are provided. (UK MIL APD GEN-2-2-10)507 = Terminal Control Area (TMA/TCA): a control area normally situated at the confluence of ATS Routes in the vicinity of one or more major aerodromes (UK MIL AIP GEN-2-2-14)


ESB, MFF

1 = power line: a cable used for the supply of electricity(S-57 Annex A, Appendix A, IHO Object Catalogue)2 = telephone/telegraph: 3 = transmission line: multiple un-insulated cables usually supported by steel lattice towers. Such features are generally more prominent than normal power lines. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = telephone: a cable used for the transmission of telephone signals. (S-57 Annex A, Appendix A, IHO Object Catalogue)5 = telegraph: a cable used for the transmission of telegraph signals. (S-57 Annex A, Appendix A, IHO Object Catalogue)6 = mooring cable/chain: a cable or chain used to secure a mooring buoy or other floating structure.(S-57 Annex A, Appendix A, IHO Object Catalogue) 501 = data transmission: a cable used for the transmission of data.(AML)502 = fibre optic: a cable comprised of multiple bundles of extremely thin flexible glass, transmitting light by total internal reflection. (Adapted from Chambers Concise Dictionary)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


additional values

501 = Maritime rescue co-ordination Centre: a unit responsible for promoting efficient organization of search and rescue services and for co-ordinating the conduct502 = Maritime Rescue Sub-centre: a unit subordinate to a rescue co-ordination centre, established to complement the latter according to particular provisions of the responsible authorities. (AML)


501 = RV Location: specified location that is identified and used as a rendezvous point (AML)701 = Unknown:703 = Not Applicable:704 = Other:


additional values

Indicates the inclusion criteria and completeness regarding the feature content of the dataset. (AML)


501 = complete: the area specified has been populated for all known features. Absence of features indicates that there are no such entities available to the data producer.502 = partial: certain features have not been included (or only partially included) within the specified area. Details must be provided in supporting textual information.

new meta attribute

1 = steep coast: A coast backed by rock or earth cliffs, gives a good radar return and is useful for visual identification from a considerable distance off, where cliffs alternate with low lying coast along the shoreline. (IHO Chart Specifications, M-4)2 = flat coast: A level coast with no obvious topographic features. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = sandy shore: a shoreline area made up of sand, ie. loose material consisting of small but easily distinguishable, separate grains, between 0.0625 and 2.000 millimetres in diameter. (adapted from IHO Dictionary, S-32, 5th Edition, 4497)4 = stony shore: A shoreline area made up of rock and rock fragments ranging in size from pebbles and gravel to boulders or large rock masses. (adapted from IHO Dictionary, S-32, 5th Edition, 5059)5 = shingly shore: A shoreline area made up of rounded, often flat water-worn rock fragments larger than approximately 16 mm. (adapted from IHO Dictionary, S-32, 4683)6 = glacier (seaward end): Projecting seaward extension of glacier, usually afloat. Also called glacier tongue. (IHO Dictionary, S-32, 5th Edition 2043)7 = mangrove: One of several genera of tropical trees or shrubs which produce many prop roots and grow along low lying coasts into shallow water. (IHO Dictionary, S-32, 5th Edition 3064)8 = marshy shore: A shoreline area made up of spongy land saturated with water. It may have a shallow covering of water, usually with a considerable amount of vegetation appearing above the surface. (adapted from IHO Dictionary, S-32, 5240)1 = aerial cableway: A conveyor along which material or people are transported by means of overhead cables supporting buckets, cable cars, etc. (S-57 Annex A, Appendix A, IHO Object Catalogue)2 = belt conveyor: A conveyor along which material or people are transported by means of a moving belt. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:703 = Not Applicable:704 = Other:

LBO ESB RAL MFF CLB, SBO

1 = coverage available: continuous coverage of spatial objects is available within this area2 = no coverage available: an area containing no spatial objects

1 = triangulation point: A recoverable point on the earth, whose geographic co-ordinates have been determined by angular methods with geodetic instruments. (Adapted from IHO Dictionary, S-32, 5th Edition, 5646)2 = observation spot: A point used by surveyors for determining precise position by astronomical means. (IHO Chart Specifications, M-4)3 = fixed point: A point whose position has been accurately determined and plotted. (IHO Chart Specifications, M-4)4 = bench-mark: A permanent, stable object containing a marked point of known elevation with respect to a datum used as a reference level for tidal observations or as a control point for levelling. (IHO Dictionary, S-32, 5th Edition, 462)5 = boundary mark: A marker identifying the location of a surveyed boundary line (Digital Geographic Information Standard - DIGEST, Oct.87)6 = horizontal control, main station: A station in a network of permanently marked control points having their geographic positions established to form third order accuracy or better. (Canadian Hydrographic Service, Survey Standing Order, 3.1-85)7 = horizontal control, secondary station: A station in a network of control points of a localised nature utilised for shoreline plots, sounding marks, stadia work, etc., whose geographic position may be established to a slightly lower order than main control points. (Canadian Hydrographic Service, Survey Standing Order, 3.1-85)


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Classification of Dumping Ground Classification of Dumping Ground S ESB CATDPG 23 L S-57 Attribute

Category of Fishing Facility Category of Fishing Facility I ESB CATFIF 26 E S-57 Attribute

Type of Fortified Structure Type of Fortified Structure I ESB CATFOR 28 E S-57 Attribute

Category of Ferry Category of Ferry I RAL CATFRY 25 E S-57 Attribute

Fishing Activity Fishing Activity I RAL catfsh 20502 E

Category of Harbour Facility Category of Harbour Facility S MFF CATHAF 30 L S-57 Attribute

Classification of Ice Classification of Ice I MFF CATICE 32 E

Type of Imagery Type of Imagery S ESB catimg 20503 L

Category of Installation Buoy Category of Installation Buoy I MFF CATINB 33 E S-57 Attribute

Category of Lateral Mark Category of Lateral Mark I MFF CATLAM 36 E S-57 Attribute

Category of Light Category of Light S CATLIT 37 L S-57 Attribute

Type of Landmark Type of Landmark I ESB CATLMK 35 E S-57 Attribute

Classification of Land Region I ESB CATLND 34 E

Category of military exercise airspace Category of military exercise airspace (aeronautical) I RAL catmea 20506 E

Category of Marine farm/culture Category of Marine farm/culture I MFF CATMFA 38 E S-57 Attribute

1 = general dumping ground: 2 = chemical waste dumping ground: An area at sea where chemical waste is dumped. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = nuclear waste dumping ground: An area at sea where nuclear waste is dumped. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = explosives dumping ground: An area at sea where explosives are dumped. (S-57 Annex A, Appendix A, IHO Object Catalogue)5 = spoil ground: An area at sea where dredged material is deposited. Also called dumping ground. (IHO Dictionary, S-32, 5th Edition, 4930)6 = vessel dumping ground: An area at sea where disused vessels are scuttled. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:

1 = fishing stake: a pole or stake placed in shallow water to outline a fishing ground or to catch fish (IHO Dictionary, S-32, 5th Edition, 1818).2 = fish trap: a structure (usually portable) for catching fish (IHO Dictionary, S-32, 5th Edition, 1819).3 = fish weir: a fence of stakes or stones set in a river or along the shore to trap fish (IHO Dictionary, S-32, 5th Edition, 5967).4 = tunny net: a net built at sea for catching tunny (IHO Dictionary, S-32, 5th Edition, 5700).701 = Unknown:703 = Not Applicable:704 = Other:

1 = castle: A large fortified building or structure. (Adapted from the Collins Dictionary)2 = fort: A fortified enclosure, building or position able to be defended against an enemy. (The Collins Dictionary)3 = battery: A fortified structure on which artillery is mounted. (The Collins Dictionary)4 = blockhouse: A concrete structure strengthened to give protection against enemy fire, with apertures to allow defensive gunfire. (The Collins Dictionary)5 = Martello Tower: A round fort for coastal defence. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:703 = Not Applicable:704 = Other:

1 = 'free moving' ferry: a ferry which may have routes that vary with weather, tide and traffic. (adapted from M-4)2 = cable ferry: a ferry that follows a fixed route guided by a cable. (adapted from M-4)3 = ice ferry: a winter-time ferry which crosses a lead. (Finnish Maritime Administration)701 = Unknown:703 = Not Applicable:704 = Other:

The attribute 'category of ferry' does not encode the various types of vessel, but the manoeuvrability of the ferry. The value 'cable ferry' indicates a ferry that follows a fixed route guided by a cable. A cable ferry may hinder the flow of other traffic.

501 = Bottom Trawling: Method of fishing involving dragging an open-mouthed bag-net along the sea bed. (Adapted from Chambers Concise Dictionary)502 = Drift Nets: Fishing with a net that is allowed to drift with the tide. (Adapted from Chambers Concise Dictionary)503 = Fishing Stakes: Poles or stakes placed in shallow water to outline a fishing ground or to catch fish. (Adapted from IHO Dictionary, S-32, 5th Edition, 1818)504 = Fish Trap: A structure (usually portable) for catching fish. (IHO Dictionary, S-32, 5th Edition, 1819)505 = Fish Weir: A fence of stakes or stones set in a river or along the shore to trap fish. (IHO Dictionary, S-32, 5th Edition, 5967)506 = Longlines: A long fishing line with many hooks attached. (Adapted from Chambers Concise Dictionary)507 = Pelagic Nets: Fishing activity taking place in surface waters and middle depths. (Adapted from Chambers Concise Dictionary)508 = Scallop dredging: Dredging along the bottom to collect scallops. (Adapted from Chambers Concise Dictionary)509 = Tunny Net: A net built at sea for catching tunny. (IHO Dictionary, S-32, 5th Edition, 5700)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


1 = RoRo terminal: a terminal for roll-on roll-off ferries.2 = timber yard: 3 = ferry terminal: a terminal for passenger and vehicle ferries.4 = fishing harbour: a harbour with facilities for fishing boats.5 = yacht harbour/marina: a harbour with facilities for small boats and yachts (IHO Dictionary, S-32, 5th Edition, 3095).6 = naval base: a centre of operations for naval vessels (adapted from The Collins Dictionary).7 = tanker terminal: a terminal for the bulk handling of liquid cargoes.8 = passenger terminal: a terminal for the loading and unloading of passengers.10 = container terminal: a terminal for container ships.11 = bulk terminal: a terminal for the handling of bulk materials such as iron ore, coal, etc.701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:

1 = fast ice: Sea ice which remains fast, generally in the position where originally formed, and which may attain a considerable thickness. It is found along coasts, where it is attached to the shore, or over shoals, where it may be held in position by islands, grounded icebergs or grounded polar ice. (IHO Dictionary, S-32, 5th Edition, 1772)2 = sea ice: Any form of ice which has originated from sea water. Generally any ice in the sea. (IHO Dictionary, S-32, 5th Edition, 4566)3 = growler: a low lying mass of flow ice which is not easily seen by approaching vessels owing to its dark indigo colour. It is therefore a menace to shipping. It is usually caused by the capsizing and disintegration of an iceberg.4 = pancake ice: Pieces of new ice, usually approximately circular, about 30 cm to 3 m across, and with raised rims, due to the pieces striking against each other as the result of wind and swell. (IHO Dictionary, S-32, 5th Edition, 3643)5 = glacier: A mass of snow and ice continuously moving from higher to lower ground or, if afloat, continuously spreading. (IHO Dictionary, S-32, 5th Edition, 2041)7 = pack ice: Term used in a wide sense to include any area of sea ice, other than fast ice, no matter what form it takes or how it is disposed. (IHO Dictionary, S-32, 5th Edition, 3639)8 = polar ice: sea ice that is more than one year old (in contrast to winter ice). The WMO code defines polar ice as any sea ice more than one year old and more than 3 metres thick. (IHO Dictionary, S-32, 5th Edition, 3928)


additional values

501 = Aerial: A photograph taken from the air. (IHO Dictionary S-32, 5th Edition, 3794)502 = Ground: A photograph taken by a camera located on the ground. (Adapted from IHO Dictionary S-32, 5th Edition, 3796)503 = Infrared: Image produced using infrared radiation (Adapted from Chambers Concise Dictionary)504 = Oblique: A photograph taken with the camera axis intentionally directed between the horizontal and the vertical. (IHO Dictionary S-32, 5th Edition, 3801)505 = Panoramic: A wide angle view, generally taken by rotation about an axis. 506 = Photomosaic: A number of photographic images fitted together to make one larger image. (AML)507 = Radar: Image produced from the use of high-powered radio pulses. (Adapted from Chambers Concise Dictionary)508 = Satellite Image: Image produced by a satellite orbiting the earth. (AML)509 = Vertical: A photograph taken with the camera axis vertical. (Adapted from IHO Dictionary S-32, 5th Edition, 3803)510 = video: A moving visual image. (AML)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


1 = catenary anchor leg mooring (CALM): incorporates a large buoy which remains on the surface at all times and is moored by 4 or more anchors. Mooring hawsers and cargo hoses lead from a turn-table on top of the buoy, so that the buoy does not turn as the ship swings to wind and stream.2 = single buoy mooring (SBM): a mooring structure used by tankers to load and unload in port approaches or in offshore oil and gas fields. The size of the structure can vary between a large mooring buoy and a manned floating structure. Also known as single point mooring (SPM). (IHO Dictionary, S-32, 4th Edition)701 = Unknown:703 = Not Applicable:704 = Other:

1 = port-hand lateral mark: indicates the port boundary of a navigational channel or suggested route when proceeding in the `conventional direction of buoyage'.2 = starboard hand lateral mark: indicates the starboard boundary of a navigational channel or suggested route when proceeding in the `conventional direction of buoyage'.3 = preferred channel to starboard lateral mark: at a point where a channel divides, when proceeding in the `conventional direction of buoyage', the preferred channel (or primary route) is indicated by a modified port-hand lateral mark.4 = preferred channel to port lateral mark: at a point where a channel divides, when proceeding in the `conventional direction of buoyage', the preferred channel (or primary route) is indicated by a modified starboard-hand lateral mark.701 = Unknown:703 = Not Applicable:

There are 2 international buoyage regions, A and B between which lateral marks differ. The buoyage region is encoded using the separate attribute MARSYS. When top-marks, retro reflectors and/or lights are fitted to these marks, they are encoded as separate objects.

ESB, MFF

1 = directional function: A light illuminating a sector of very narrow angle and intended to mark a direction to follow. (IHO Dictionary S-32, 5th Edition, 2778) 4 = leading light: A light associated with other lights so as to form a leading line to be followed. (Adapted from IHO Dictionary S-32, 5th Edition, 2794)5 = aero light: An aero light is established for aeronautical navigation and may be of high power than marine lights and visible from well offshore. (IHO Chart Specifications, M-4, 476.1)6 = air obstruction light: A light marking an obstacle which constitutes a danger to air navigation. (IHO Dictionary S-32, 5th Edition, 2767)7 = fog detector light: A light used to automatically determine conditions of visibility which warrant the turning on or off of a sound signal. (IHO Dictionary S-32, 5th Edition , 1885)8 = flood light: A broad beam light used to illuminate a structure or area (Adapted from the Collins Dictionary)9 = strip light: A light whose source has a linear form generally horizontal, which can reach a length of several metres. (S-57 Annex A, Appendix A, IHO Object Catalogue)10 = subsidiary light: A light placed on or near the support of a main light and having a special use in navigation. (ALRS)11 = spotlight: A powerful light focused so as to illuminate a small area. (The Collins Dictionary)12 = front: Term used with leading lights to describe the position of the light on the lead as viewed from seaward. (S-57 Annex A, Appendix A, IHO Object1 = cairn: A mound of stones, usually conical or pyramidal, raised as a landmark or to designate a point of importance in surveying. (IHO Dictionary S-32, 5th Edition, 601)2 = cemetery: An area of land for burying the dead. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = chimney: A vertical structure containing a passage or flue for discharging smoke and gasses. (Digital Geographic Information Standard - DIGEST)4 = dish aerial: A parabolic aerial for the receipt and transmission of high frequency radio signals. (IHO Dictionary S-32, 5th Edition, 1400)5 = flagstaff (flagpole): A staff or pole on which flags are raised. (Digital Geographic Information Standard - DIGEST 1.28)6 = flare stack: A tall structure used for burning-off waste oil or gas. (IHO Dictionary S-32, 5th Edition, 1836)7 = mast: A straight vertical piece of timber or a hollow cylinder. (Adapted from Digital Geographic Information Standard - DIGEST)8 = windsock: A tapered fabric sleeve mounted so as to catch and swing with the wind, thus indicating the wind direction. (Navigation dictionary, US National Oceanic and Atmospheric Administration - NOAA, 1969)9 = monument: A structure erected or maintained as a memorial to a person or event. (Digital Geographic Information Standard - DIGEST)10 = column (pillar): A cylindrical or slightly tapering body of considerably greater length than diameter erected vertically. (Oxford English Dictionary)

Classification of Land Region - General terms for describing landscapes e.g. land use and/or geology. (AML)

501 = beach: on a shore, the area on which the waves break and over which shore debris, such as sand, shingle, pebbles, accumulate. A beach includes backshore and foreshore. (IHO Dictionary, S-32, 5th Edition, 418)502 = backshore: That part of a beach which is usually dry, being reached only by the highest tides. (IHO Dictionary, S-32, 5th Edition, 349)503 = foreshore: That part of the shore which lies between high and low water mark at ordinary tide. (IHO Dictionary, S-32, 5th Edition, 1907)701 = Unknown:703 = Not Applicable:704 = Other:


additional values

501 = Areas of Intense Aerial Activity (AIAA): Airspace within which the intensity of civil and/or military flying is exceptionally high or where aircraft, either singly or in combination with others, regularly participate in unusual manoeuvres (ENR 1.1, section 2.2)502 = Aerial Tactics Area (ATA): Airspace of defined dimensions designated for air combat training within which high energy manoeuvres are regularly practised by aircraft formations (ENR 1.1, section 2.3)503 = Air Defence Identification Zone (ADIZ): Airspace of defined dimensions within which the ready identification, location and control of aircraft is required.504 = Air-to Air Refuelling Area (AARA): Airspace of defined dimensions within which air-to-air refuelling takes place under radar service (ENR 1.1, section 2.4)505 = Military Terminal Control AREA (MTCA): Military equivalent of a Terminal Control Area (UK MIL AIP GEN-2-2-12)506 = Low Flying Area (LFA): An airspace of defined dimensions to facilitate low-level flying practice (AML)507 = Night Flow Area (NFA): (definition to be defined)508 = Helicopter Training Area (HTA): An airspace of defined dimensions to facilitate helicopter pilot training (AML)509 = Military Operating Area (MOA): Areas within which aerobatics, air combat manoeuvres, high volumes of pilot training and unusual types of training take place (AML). 510 = Instrument Flying Area (IFA): (definition to be defined)701 = Unknown:


1 = crustaceans: hard shelled animals for example crabs or lobsters.2 = oysters/mussels: edible bivalve molluscs.3 = fish: a vertebrate cold blooded animal with gills, living in water.4 = seaweed: the general name for marine plants of the Algae class which grow in long narrow ribbons. (Int. Mar. Dictionary 2nd Ed.)5 = pearl culture farm: an area where pearls are artificially cultivated.701 = Unknown:703 = Not Applicable:704 = Other:


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Category of marine management area Category of marine management area I RAL catmma 20504 E

Category of Mooring/warping facility Category of Mooring/warping facility I ESB CATMOR 40 E

Category of Military Practice Area Category of Military Practice Area S RAL CATMPA 39 L

Category of maritime safety information Category of maritime safety information I RAL catmsi 20505 E

Category of Obstruction I CATOBS 42 E

Category of Offshore Platform Category of Offshore Platform S MFF CATOFP 43 L S-57 Attribute

Category of patrol area Category of patrol area I RAL catpat 20507 E

Category of Pipeline Category of Pipeline S CATPIP 47 L S-57 Attribute

Category of Production Area Category of Production Area I MFF CATPRA 48 E S-57 Attribute

Category of Radar Station Category of Radar Station I RAL CATRAS 51 E S-57 Attribute

Category of Restricted Area Category of Restricted Area I RAL CATREA 56 E

Category of reporting/radio calling-in point Category of reporting/radio calling-in point S RAL catrep 20508 E N/A N/A resurrected at v2.0

Classification of Road Classification of Road I ESB CATROD 57 E S-57 Attribute

Category of Radio Station S RAL CATROS 53 L

Category of Rescue Station S MFF CATRSC 55 L S-57 Attribute

Category of territorial sea baseline Category of territorial sea baseline I RAL catsbl 20510 E

501 = Conservation and Management Zone: An agreed protection zone that has been established to ensure the conservation of fish stocks and establish maritime jurisdiction (AML).502 = Foreign Fishing Rights: An offshore zone within the Fishery Limits of the coastal nation within which fishing rights have been granted to foreign fishermen (Note taken from Q6385 modified by AML)503 = International Council for the Exploration of the Sea (ICES) fishing Area: The offshore management zones as defined by the International Council for the Exploration of the Sea (ICES) used for the purpose of fishery statistics and regulations in the north-east Atlantic (AML).504 = Maritime pollution (MARPOL) reporting grid: A matrix used for reporting maritime pollution. (AML)505 = Marine nature Reserve (US Marine Sanctuary): An officially designated area in which there may be restrictions on entry, fishing, anchoring, and other activities in order to protect the marine environment (IHO Dictionary, S-32, 5th Edition, 3104)701 = Unknown:703 = Not Applicable:704 = Other:


501 = fast patrol boat waiting position: Position where Fast Patrol Boats can moor to an islet or land. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


additional values

3 = submarine exercise area: An area within which submarine exercises are carried out.501 = ACLANT grid: The ACLANT (Allied Command Atlantic) submarine grid provides NATO submarine operating authorities with a common grid for the water space management of NATO submarines (modified ATP-1(C) 3-42)502 = Surface Danger Area: an area in which certain activities or factors of significance to surface navigation or operations apply. (modified FACC)503 = JMC Areas - JENOA grid: A Joint Exercise Notification and Operating Area management grid used by the Joint Maritime Operational Training Staff (JMOTS) for the positioning of forces. It provides a framework for operating forces in widely dispersed groups. 504 = practice and exercise area (surface fleet): An area within which military exercises may be carried out. (AML)505 = stovepipe: A designated circular water column with a specified radius (in NMs), used by submarines for vertical navigation between allocated `Depth Separation' layers within a submarine operating area/zone (Modified FlOO Vol.4 - 4208 paragraph 6/7)506 = safe bottoming area: An area that has been surveyed and reported as safe for submarines to rest on the sea bed. 507 = submarine danger area: An area in which submarine operations are prohibited or limited, owing to the existence of hazards to dived submarines (AHP6 Vol.II)


additional values

501 = search and rescue region: the area of responsibility for a rescue co-ordination centre.502 = GMDSS area: global maritime distress and safety system area. 503 = forecast area: specified regions for the receipt of meteorological forecasts. 504 = INMARSAT coverage: INternational Mobile SATellite Organization. Coverage of the satellites. 505 = MilSat coverage: Coverage of a military satellite. 701 = Unknown:703 = Not Applicable:704 = Other:


Description of the type of obstruction.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

LBO, MFF

1 = Snag/stump: a tree, branch or broken pile embedded in the ocean floor, river or lake bottom and not visible on the surface, forming thereby a hazard to vessels. (IHO Dictionary, S-32, 5th Edition, 4794)2 = wellhead: a submarine structure projecting some distance above the seabed and capping a temporarily abandoned or suspended oil or gas well. (IHO Dictionary, S-32, 5th Edition, 5976)3 = diffuser: a structure on an outfall through which liquids are discharged. The structure will usually project above the level of the outfall and can be an obstruction to navigation.(S-57 Annex A, Appendix A, Chapter 2 Attributes)4 = crib: a permanent structure set in the water, framed with wooden beams and filled with rocks or boulders. They are used to anchor log booms or support other constructions, e.g. submerged outfalls, diffusers etc. They may always be dry, submerged or cover and uncover.(S-57 Annex A, Appendix A, Chapter 2 Attributes)5 = fish haven: areas established by private interests, usually sport fishermen, to simulate natural reefs and wrecks that attract fish. The reefs are constructed by dumping assorted junk in areas which may be of very small extent or may stretch a considerable distance along a depth contour. Also called fishery reefs.(S 57 Annex A, Appendix A, Chapter 2 Attributes)6 = foul area: an area of numerous unidentified dangers to navigation. The area serves as a warning to the mariner that all dangers are not identified individually and that navigation through the area may be hazardous. Commonly used to encode areas behind danger lines on navigation charts. (adapted from IHO Dictionary, S-32, 5th Edition,


additional values

1 = oil derrick/rig: a temporary mobile structure, either fixed or floating, used in the exploration stages of oil and gas fields.(IHO Dictionary, S-32, 5th Edition)2 = production platform: a term used to indicate a permanent offshore structure equipped to control the flow of oil or gas. It does not include entirely submarine structures. (IHO Dictionary, S-32, 5th Edition, 4037)3 = observation/research platform: a platform from which one's surroundings or events can be observed, noted or recorded such as for scientific study. (adapted from IHO Dictionary, S-32, 5th Edition, 3493/3500)4 = articulated loading platform (ALP): a metal lattice tower, buoyant at one end and attached at the other by a universal joint to a concrete filled base on the sea bed. The platform may be fitted with a helicopter platform, emergency accommodation and hawser/hose retrieval. (adapted from UKHO CSDO 607.2 (12), May 1994)5 = single anchor leg mooring (SALM): a rigid frame or tube with a buoyancy device at its upper end , secured at its lower end to a universal joint on a large steel or concrete base resting on the sea bed, and at its upper end to a mooring buoy by a chain or wire. (adapted from UKHO CSDO 607.2 (12), May 1994)6 = mooring tower: a platform secured to the sea bed and surmounted by a turn-table to which ships moor. (adapted from UKHO CSDO 607.2 (12), May 1994)7 = artificial island: a man-made structure usually built for the exploration or exploitation of marine resources, marine scientific research, tidal observations, etc. (adapted from IHO Dictionary, S-32, 5th Edition, 240)501 = 4W disposition grid: The 4W Disposition Grid is a NATO command system for the positioning of forces.It provides a framework for operating forces in widely dispersed groups. (AML)502 = Operational/Naval Patrol: An offshore zone patrolled by naval vessels (AML).701 = Unknown:703 = Not Applicable:704 = Other:


ESB, MFF

2 = outfall pipe:A pipe (generally a sewer or drainage pipe) discharging in to the sea or river. (S-57 Annex , Appendix A, IHO Catalogue) 3 = intake pipe:A pipe taking water from a river or other body of water, to drive a mill or supply a canal, waterworks, etc. (IHO Dictionary, S-32, 5th Edition, 2468) 4 = sewer: A pipe in a sewage system for carrying water or sewage to a disposal area. (S-57 Annex , Appendix A, IHO Catalogue) 5 = bubbler system: A submerged pipe from which warm water bubbles, preventing the surrounding water from freezing. (S-57 Annex , Appendix A, IHO Catalogue) 6 = supply pipe: A pipe used for supplying of gas or liquid product. (S-57 Annex , Appendix A, IHO Catalogue) 701 = Unknown:703 = Not Applicable:704 = Other:

3 = stockpile: a reserve stock of material, equipment or other supplies.4 = power station area: a stationary plant containing apparatus for large-scale conversion of some form of energy (hydraulic, steam, chemical, nuclear, etc.) into electrical energy.5 = refinery area: a system of process units used to convert crude petroleum into fuels, lubricants and other petroleum derived products.7 = factory area: a group of buildings where goods are manufactured.8 = tank farm: an area in which a number of large-capacity storage tanks are located, generally used for crude oil or petroleum products.9 = wind farm: an area in which numerous wind motors are located.10 = slag heap/spoil heap: hill of refuse from a mine, industrial plant etc. on land (adapted from Concise Oxford Dictionary).701 = Unknown:703 = Not Applicable:704 = Other:

1 = radar surveillance station: a radar station established for traffic surveillance.(IHO Dictionary, S-32, 5th Edition, 4144)2 = coast radar station: a shore-based station which the mariner can contact by radio to obtain a position.(IHO Chart Specifications, M-4)701 = Unknown:703 = Not Applicable:704 = Other:

1 = offshore safety zone: the area around an offshore installation within which vessels are prohibited from entering without permission; special regulations protect installations within a safety zone and vessels of all nationalities are required to respect the zone.(IHO Dictionary, S-32, 5th Edition, 4471). (For legal definition see UNCLOS Article 60)9 = military area: an area controlled by the military in which restrictions may apply. (Hydrographic Service, Royal Australian Navy)10 = historic wreck area: an area around certain wrecks of historical importance to protect the wrecks from unauthorized interference by diving, salvage or deposition (including anchoring). (IHO Chart Specifications, M-4)14 = minefield: an area laid and maintained with explosive mines for defence or practice purposes.25 = swinging area: an area where vessels turn. (Service Hydrographique et Oceanographique de la Marine, France)501 = Maritime notification area: An area within which notification is required between respective military authorities of future military exercises/activities. (AML)502 = Mine danger area: an area formerly laid with mines where the controlling authority have not provided proof of clearance (AML)701 = Unknown:703 = Not Applicable:


additional values

The official legal status of each kind of restricted area defines the kind of restriction(s), e.g. the restriction for a `game reserve' may be èntering prohibited', the restriction for an ànchoring prohibition area' is ànchoring prohibited'.

501 = Reporting/Radio calling in point:502 = Coastguard reporting point:503 = Helicopter reporting point:701 = Unknown:703 = Not Applicable:704 = Other:


1 = motorway: A main road with separate carriageways and limited access, specially constructed and controlled for fast motor traffic. (S-57 Annex A, Appendix A, IHO Object Catalogue)2 = major road: A hard surfaced (metalled) road; a main through route. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = minor road: A secondary road for local traffic. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = track path: Track - a rough path or way formed by use. Path - a way or track laid down for walking or made by continual treading. (S-57 Annex A, Appendix A, IHO Object Catalogue) 5 = major street: A main road, in an urban area, for local traffic. (S-57 Annex A, Appendix A, IHO Object Catalogue)6 = minor street: A secondary road, in an urban area, for local traffic. (S-57 Annex A, Appendix A, IHO Object Catalogue)7 = crossing: A place where roads, etc. intersect. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:703 = Not Applicable:704 = Other:

A radiobeacon is a radio transmitter which emits a distinctive or characteristic signal on which a bearing may be taken (IHO Dictionary, S-32, 5th Edition, 4168).

1 = circular (non-directional) marine or aero-marine radiobeacon: a radio station which need not necessarily be manned, the emissions of which, radiated around the horizon, enable its bearing to be determined by means of the radio direction finder of a ship. (IHO Dictionary, S-32, 5th Edition, 802)2 = directional radiobeacon: a special type of radiobeacon station the emissions of which are intended to provide a definite track for guidance. (IHO Dictionary, S-32, 5th Edition, 1378)3 = rotating pattern radiobeacon: a special type of radiobeacon station emitting a beam of waves to which a uniform turning movement is given, the bearing of the station being determined by means of an ordinary listening receiver and a stop watch. Also referred to as a rotating loop radiobeacon. (IHO Dictionary, S-32, 5th Edition, 4444)4 = consol beacon: a type of long range position fixing beacon.5 = radio direction-finding station: a radio station intended to determine only the direction of other stations by means of transmission from the latter. (IHO Dictionary, S-32, 5th Edition, 4174)6 = coast radio station providing QTG service: a radio station which is prepared to provide QTG service, that is to say, to transmit upon request from a ship, a radio signal, the bearing of which can be taken by that ship. (IHO Dictionary, S-32, 5th Edition, 4108)


additional values

Category of Rescue Station. The type of equipment or service that may be found at the rescue station. (AML)

6 = lifeboat lying at mooring: a place where a lifeboat is moored ready for use.(S-57 Appendix A,Chapter 2 Attributes)701 = Unknown:703 = Not Applicable:704 = Other:

501 = archipelagic: Archipelagic baselines are straight lines joining the outermost points of the outermost islands and drying reefs of an archipelago (IHO Dictionary, S-32, 5th Edition, 391). (For legal definition see UNCLOS Article 47)502 = normal (including bay closing line): The low water line along the coast as marked on large-scale charts officially recognised by the coastal State Bay closing line: A line dividing the internal waters and territorial seas in a bay (IHO Dictionary, S-32, 5th Edition,392 & 415.).(For legal definition see UNCLOS Article 5,6,9,10,-13)503 = Straight: Straight baselines are a system of straight lines joining specific or discrete points on the low water line, usually known as straight baseline turning points (IHO Dictionary, S-32, 5th Edition, 393). (For legal definition see UNCLOS Article 7)701 = Unknown:703 = Not Applicable:704 = Other:



56

57

58

59

60

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62

63

64

65

66

67

68

69

70

71

Category of Sea Area Category of Sea Area I CATSEA 59 E

Category of signal station, warning Category of signal station, warning S MFF CATSIW 62 L S-57 Attribute

Type of Shoreline Construction Type of Shoreline Construction I ESB CATSLC 60 E

Category of Special Purpose Mark Category of Special Purpose Mark S MFF CATSPM 66 L S-57 Attribute

Trafficability Ability of the beach to support vehicular traffic (AML) I ESB cattrf 20511 E

Category of Recommended Track Category of Recommended Track I MFF CATTRK 54 E S-57 Attribute

Category of Traffic Separation Scheme Category of Traffic Separation Scheme I MFF CATTSS 67 E S-57 Attribute

Category of Weed/Kelp Category of Weed/Kelp I ESB CATWED 70 E

Category of Wreck I LBO CATWRK 71 E S-57 Attribute

CCM Index I ESB ccmidx 20693 Value between 0 and 100 I

Clearance Percentage I ESB clperc 20620 Percentage I

Classification Probability R ESB clprob 20657 Value between 0 and 1 F

Colour Colour S COLOUR 75 L S-57 Attribute

Colour Pattern Colour Pattern S ESB COLPAT 76 L S-57 Attribute

Communication Channel S RAL COMCHA 77 Specific VHF Channel - should be indicated by 2 digits and up to 2 characters (A-Z) A S-57 Attribute

Communications Method of communication available. (AML) S ESB commns 20621 L

Command System S SBO comsys 20512 Text string S

Contact Details Contact details including telephone, telex, fax etc. S RAL condet 20691 Text string S

CLB, ESB

1 = sea area in general: 2 = gat: a natural or artificial passage or channel through shoals or steep banks,lying between two channels. (IHO Dictionary, S-32, 5th Edition)3 = bank: an elevation over which the depth of water is relatively shallow, but normally sufficient for safe surface navigation. (IHO-IOC Publication B-6 Standardisation of Undersea Feature Names, 2nd Edition)4 = deep: in oceanography, an obsolete term which was generally restricted to depths greater than 6,000 m. (IHO Dictionary, S-32, 5th Edition)5 = bay: an indentation in the coastline6 = trench: a long narrow, characteristically very deep and asymmetrical depression of the sea floor, with relatively steep sides. (IHO-IOC Publication B-6 Standardisation of Undersea Feature Names, 2nd Edition)7 = basin: a depression, characteristically in the deep sea floor, more or less equidimensional, in plan and of variable extent. (adapted from IHO-IOC Publication B-6 Standardisation of Undersea Feature Names, 2nd Edition)8 = mudflats: A muddy stretch submerged at high water. (Chambers Concise Dictionary 1988)9 = reef: rock lying at or near the sea surface that may constitute a hazard to surface navigation. (IHO-IOC Publication B-6 Standardisation of Undersea Feature Names, 2nd Edition)10 = ledge: a rocky formation continuous with and fringing the shore. (IHO Dictionary, S-32, 5th Edition)


additional values

11 = tidal stream: a signal or message conveying information on condition of tidal currents in the area in question. (IHO Dictionary, S-32, 5th Edition, 4733)12 = tide gauge: a device for measuring the height of tide. A graduated staff in a sheltered area where visual observations can be made; or it may consist of an elaborate recording instrument making a continuous graphic record of tide height against time. Such an instrument is usually actuated by a float in a pipe communicating with the sea through a small hole which filters out shorter waves. (IHO Dictionary, S-32, 5th Edition, 1984)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:

1 = breakwater: a structure protecting a shore area, harbour, anchorage, or basin from waves. (IHO Dictionary, S-32, 5th Edition, 542)2 = groyne: a low artificial wall-like structure of durable material extending from the land to seaward for a particular purpose, such as to prevent coast erosion (adapted from IHO Dictionary, S-32, 5th Edition, 2525 and IHO Chart Specifications, M-4)3 = mole: a form of breakwater alongside which vessels may lie on the sheltered side only; in some cases it may lie entirely within an artificial harbour, permitting vessels to lie along both sides. (IHO Chart Specifications, M-4)4 = pier (jetty): a long, narrow structure extending into the water to afford a berthing place for vessels, to serve as a promenade, etc. (IHO Dictionary, S-32, 5th Edition, 3833)5 = promenade pier: a pier built only for recreational purposes. (IHO Chart Specifications, M-4)6 = wharf (quay): a structure serving as a berthing place for vessels. (IHO Dictionary, S-32, 5th Edition, 5985)7 = training wall: a wall or bank, often submerged, built to direct or confine the flow of a river or tidal current, or to promote a scour action. (adapted from IHO Dictionary, S-32, 5th Edition, 5586 and IHO Chart Specifications, M-4)8 = rip rap: A layer of broken rock, cobbles, boulders, or fragments of sufficient size to resist the erosive forces of flowing water and wave action. (Adapted from Marine Chart Manual, US National Oceanic and Atmospheric Administration - NOAA, 1992)9 = revetment: facing of stone or other material, either permanent or temporary, placed along the edge of a stream, river or canal to stabilize the bank and to protect it from the


additional values

1 = firing danger mark: a mark used to indicate a firing danger area, usually at sea.2 = target mark: any object toward which something is directed. The distinctive marking or instrumentation of a ground point to aid its identification on a photograph. (Adapted from IHO Dictionary, S-32, 5th Edition, 5309)3 = marker ship mark: a mark marking the position of a ship which is used as a target during some military exercise. (BSH)4 = degaussing range mark: a mark used to indicate a degaussing range.6 = cable mark: a mark used to indicate the position of submarine cables or the point at which they run on to the land.9 = ODAS (Ocean Data Acquisition System): Ocean Data Acquisition System (IHO Dictionary, S-32, 5th Edition, 5953)15 = LANBY (Large Automatic Navigational Buoy): a large buoy designed to take the place of a lightship where construction of an offshore light station is not feasible. (IHO Dictionary, S-32, 5th Edition, 2656)18 = notice mark: a notice board or sign indicating information to the mariner.19 = TSS mark (Traffic Separation Scheme): a mark indicating a traffic separation scheme.27 = general warning mark: a mark indicating that special caution must be exercised in the vicinity of the mark.29 = restricted vertical clearance mark: a mark indicating the minimum vertical space available for passage.

A mark may be a beacon, a buoy, a signpost or may take another form.

501 = Firm: Can be used by 2WD vehicles or 4WD vehicles and trailers unless heavy and continued use is intended. (AML)502 = Moderate: Can be used by military 3 or 4 tonne vehicles starting from rest in 4WD. (AML)503 = Soft: 4WD unable to start from rest but can cross soft patch if already on the move. (AML)504: = Very Soft: Impassable to wheeled vehicles, tracked vehicles may have difficulty. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


1 = based on a system of fixed marks: a straight route (known as a recommended track, range or leading line), which comprises at least two structures (usually beacons or daymarks) and/or natural features, which may carry lights and/or top-marks. The structures/features are positioned so that when observed to be in line, a vessel can follow a known bearing with safety. (adapted from International Association of Lighthouse Authorities - IALA Aids to Navigation Guide, 1990)2 = not based on a system of fixed marks: a route (known as a recommended track or preferred route) which is not based on a series of structures or features in line.701 = Unknown:703 = Not Applicable:

1 = IMO - adopted: a defined Traffic Separation Scheme that has been adopted as an IMO routing measure.2 = not IMO adopted: a defined Traffic Separation Scheme that has not been adopted as an IMO routing measure.701 = Unknown:703 = Not Applicable:

1 = Kelp: A giant plant sometimes 60 metres long with no roots, it is anchored by hold-fasts or tendrils up to 10 metres long, that cling to rock. Gas filled bubbles on fronds act as floats keeping the kelp just below the surface. (Earth Sciences References, Mary McNeil)2 = Sea Weed: General name for marine plants of the algae class which grow in long narrow ribbons. (International Maritime Dictionary, 2nd Edition)3 = Sea Grass: Any grass-like marine alga. Eelgrass is one of the best known seagrasses. (IHO Dictionary, S-32, 5th Edition, 4565)4 = Sargasso: A certain type of sea weed, or more generally, a large floating mass of this sea weed. (IHO Dictionary, S-32, 5th Edition, 4501)501 = Posidonia: A flowering marine plant, common in the Mediterranean, found at depths of up to 13m on sandy substrates. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


additional values

Descripton of the type of Wreck.(S-57 Annex A, Appendix A, Chapter 2 Attributes). See also attribute "Type of Wreck" for indication of the vessel type before it became a wreck.

1 = non-dangerous wreck: a wreck which is not considered to be dangerous to surface navigation.(S-57 Annex A, Appendix A, Chapter 2 Attributes)2 = dangerous wreck: a wreck which is considered to be dangerous to surface navigation.(S-57 Annex A, Appendix A, Chapter 2 Attributes)3 = distributed remains of wreck: (foul ground) an area over which it is safe to navigate but which should be avoided for anchoring, taking the ground or ground fishing. (IHO Chart Specifications, M-4)4 = wreck showing mast/masts: wreck of which only the mast(s) is visible at the sounding datum indicated.(S-57 Annex A, Appendix A, Chapter 2 Attributes)5 = wreck showing any portion of hull or superstructure: wreck of which any portion of the hull or superstructure is visible at the sounding datum indicated.(S-57 Annex A, Appendix A, Chapter 2 Attributes)701 = Unknown:703 = Not Applicable:704 = Other:

Indication of the degree to which terrain of a given area will permit Cross Country Movement. (Adapted from NATO STANAG 2259)


The expected value of the percentage of mines of a given type to be cleared from an area or channel. (AML)


The estimated probability of classifying a mine or other object of potential military significance. (AML)


ESB, MFF,S

BO

1 = white: 2 = black: 3 = red: 4 = green: 5 = blue: 6 = yellow: 7 = grey: 8 = brown: 9 = amber: 10 = violet: 11 = orange: 12 = magenta: 13 = pink: 701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:

1 = horizontal stripes: Straight bands or stripes of differing colours painted horizontally. (S-57 Annex A, Appendix A, IHO Object Catalogue)2 = vertical stripes: Straight bands of different colours painted vertically. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = diagonal stripes: Straight bands or stripes of differing colours painted diagonally (ie not horizontally or vertically) (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = squared: Often referred to as checker plate, where alternate colours are used to create squares similar to a chess or draught board. The pattern may be straight or diagonal. (S-57 Annex A, Appendix A, IHO Object Catalogue)5 = stripes (direction unknown): Straight bands or stripes of differing colours painted in an unknown direction. (S-57 Annex A, Appendix A, IHO Object Catalogue)6 = border stripe: A band or stripe of colour which is displayed around the outer edge of the object, which may also form a border to an inner pattern or plain colour. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:

A channel number assigned to a specific radio frequency, frequencies or frequency band.

501 = Ship Shore:502 = Mobile:503 = Mil VHF: 504 = Civ VHF:505 = Broadcast: 506 = UHF:507 = HF:701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


The command system in use by the vessel that found the object. (AML)




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Condition I CONDTN 81 L S-57 Attribute

Confidence Level R ESB conlev 20622 Value between 0 and 1 F

Conspicuous, Radar I CONRAD 82 E S-57 Attribute

Conspicuous, Visually I CONVIS 83 E S-57 Attribute

Copyright statement S cpyrit 22491 Text string S added at v2.0

Source Scale I CSCALE 80 Unit: none I S-57 Attribute Generic S-57 Attribute

Characteristic Detection Probability (B) R ESB csprob 20659 Value between 0 and 1 F

Characteristic Detection Width (A) I ESB cswidt 20658 metres I

Current Velocity R CURVEL 84 knots F S-57 Attribute

Abandonment Date LBO databa 20484 A

End Date S DATEND 85 A S-57 Attribute

First Detection Year S datfir 20530 The "first detection date" should be encoded using 4 digits for the calendar year (CCYY). A

Last Detection Year S datlst 20540 The "last detection date" should be encoded using 4 digits for the calendar year (CCYY). A

Re-entered Date S LBO datren 20577 A

Re-suspended Date S LBO datres 20578 A

Date Sunk S LBO datsnk 20519 A

Spudded Date S LBO datspd 20590 A

Start Date S DATSTA 86 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). A S-57 Attribute

Suspension Date S LBO datsus 20599 A

Debris Field S LBO debfld 20520 A

Depth of Activity R ESB depact 20521 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F

Depth of Layer R ESB deplyr 20522 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F

Depth Restriction S RAL depres 20686 Text string S

Dangerous Marine and Land Life I ESB dgmrlf 20518 L

Danger height I RAL dgrhgt 20685 The danger height should be encoded using an integer numeric value I

Distance from Small Bottom Object R SBO discon 20523 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F

Diving Activity Type of diving activity taking place. (AML) I ESB divact 20526 E

Heading-Down Bearing R RAL dnbear 20683 degrees F

Depth range - shoalest value S DRVAL1 87 F S-57 Attribute

Depth range - deepest value S DRVAL2 88 F S-57 Attribute

Disposal Probability The estimated probability of neutralising a mine. (AML) R ESB dsprob 20656 Value between 0 and 1 F

The state of the object where it is not considered to be normal i.e. completed, undamaged or working normally.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, LBO, MFF

1 = under construction:A structure that is in the process of being built. (S-57 Annex A, Appendix A, Chapter 2 Attributes) 2 = ruined: A structure in a decayed or deteriorated condition resulting from neglect or disuse, or a damaged structure in need of repair. (IHO Dictionary, S-32, 5th Edition, 4456.)3 = under reclamation:An area of the sea that is being reclaimed as land usually by the dumping of earth and other material. (S-57 Annex , Appendix A, IHO Catalogue) 4 = wingless: a windmill or wind motor from which the turbine blades are missing. S-57 Annex A, Appendix A, IHO Object Catalogue)5 = planned construction: An area where a future construction is planned. (S-57 Annex A, Appendix A, Chapter 2 Attributes)501 = operational: completed, undamaged and working normally. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:

The attribute condition encodes the various conditions of buildings and other constructions. The default 'condition' should be considered to be completed, undamaged and working normally. This attribute should, therefore only be used to indicate objects whose condition is anything other than 'normal'.

The probability that the assumption made from a negative result of the exploratory operations is correct. (AML)


Indicates if the object returns a radar echo. (S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, LBO, MFF

1 = radar conspicuous: An object which returns a strong radar echo. (IHO Dictionary, S-32, 5th Edition, 4142.)2 = not radar conspicuous: An object which does not return a particularly strong radar echo. (S-57 Annex A, Appendix A, Chapter 2 Attributes)3 = radar conspicuous (has radar reflector): An object which returns a strong radar echo, having a radar reflector. (S-57 Annex A, Appendix A, IHO Object Catalogue)

Indicates if the object is distinctly visible from seaward.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB MFF LBO

1 = visually conspicuous: Term applied to an object either natural or artificial which is distinctly and notably visible from seaward. (IHO Dictionary, S-32, 5th Edition, 984.)2 = not visually conspicuous: An object which is visible from seaward, but is not conspicuous. (S-57 Annex A, Appendix A, Chapter 2 Attributes)

Indicates any copyright or releaseability restrictions on the data (AML)

ESB, LBO, MFF, RAL, SBO, CLB


The scale at which the source data has been compiled. (AML)


The ratio of the number of mines detected on a single run to the number of mines that could have been detected. (AML)


The width of path over which mines can be detected on a single run. (AML)


The rate of travel of a non-gravitational current (S-57 Annex A, Appendix A, IHO Object Catalogue)

ESB MFF

The attribute 'current velocity' indicates the speed of the current in knots.

The date on which a borehole is sealed. All well-head equipment is removed and the hole plugged with cement and a steel plate cemented over the top. (Adapted from An A-Z of Offshore Oil & Gas by Harry Whitehead, 2nd Ed, 1983, Gulf Publishing Company)

S The abandonment date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD).according toISO 8601:1988


If one value is unknown, it shall be filled by a null value.

Indicates the latest date on which an object will be present.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, RAL, MFF

The end date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.

The year in which the object was originally reported. (Adapted from STANAG 3715)

SBO. LBO


The year in which the object was subsequently confirmed. (Adapted from STANAG 3715)

SBO, LBO


The date on which activity at the well site resumed, either to enable further exploration or development work, or to initiate production of oil or gas. (AML)

The "re-entered date" should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.



The date on which a well is suspended for a second or subsequent time, meaning it has again been temporarily abandoned. (Adapted from An A-Z of Offshore Oil & Gas by Harry Whitehead, 2nd Ed, 1983, Gulf Publishing Company)

The "re-suspended date" should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.


Date on which the object sank or was abandoned to the sea. (AML)

The "date of sinking" should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.



The date on which a new well is spudded, meaning to start drilling a new borehole. (Adapted from An A-Z of Offshore Oil & Gas by Harry Whitehead, 2nd Ed, 1983, Gulf Publishing Company)

The " spudded date" should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.



Indicates the earliest date on which an object will be present.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, RAL, MFF

The date on which a well is suspended, meaning it has been temporarily abandoned. (Adapted from An A-Z of Offshore Oil & Gas by Harry Whitehead, 2nd Ed, 1983, Gulf Publishing Company)

The suspension date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988. CCYYMMDD



The length and orientation of the longest dimension of the debris field associated with the object. (AML)

Encoded in pairs: the length of the material alomg the sea flor and the orientation of the longest dimension of the material from true north. The "debris field" data should be encoded using a floating point numeric value for the length of the material along the sea floor (LLLL.L) and an integer numeric value for the orientation of the material from true north (OOO).


The figures describing each value shall be separated by a comma.Where no value is available for one or more elements, a null value should be used to preserve integrity of the pair.Multiple debris fields will be represented by repeated groups of these values.

Average depth at which diving activities are taking place. (AML)


Estimated general depth of rock layer or unconsolidated surface materials. (Adapted from DIGEST FACC, Annex B: B105)


Restrictions and/or additional qualifying information relating to submarine navigation (AML)


Marine and land life that could be dangerous to personnel during amphibious operations. (AML)

501 = Anemones: Solitary soft-bodied polyps, having many tentacles. (Adapted from Chambers Concise Dictionary)502 = Insects: A division of Arthropods having a distinct head, thorax and abdomen, with three pairs of legs attached to the thorax, usually winged in adult life, and commonly having a metamorphosis in the life-history. (Adapted from Chambers Concise Dictionary)503 = Jelly Fish: A marine coelenterate with a jelly-like body. (Adapted from Chambers Concise Dictionary)504 = Land Snakes: Land living elongated limbless reptiles, often venomous. (Adapted from Chambers Concise Dictionary)505 = Sea Snakes: Marine elongated limbless reptiles, often venomous. (Adapted from Chambers Concise Dictionary)506 = Sea Urchins: Marine animal with a globular body and shell of calcareous plates. (Adapted from Chambers Concise Dictionary)507 = Sharks: Voracious elasmobranch fishes with lateral gill-slits and the mouth on the underside. (Adapted from Chambers Concise Dictionary)508 = Spiders: An arachnid of the order Araneida, the body divided into two distinct parts. (Adapted from Chambers Concise Dictionary)509 = Venomous Fish: Fish secreting poisonous fluids. (Adapted from Chambers Concise Dictionary)701 = Unknown:


The reported danger height (in feet) below which a danger to aircraft or aeronautical navigation exists (AML)


Distance from the object of the position from which the image was obtained. (AML)


501 = Commercial: Diving taking place for financial gain. (AML)502 = Sports: Diving for recreational purposes. (AML)503 = Training: Practical instruction in diving techniques. (AML)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


The horizontal direction heading down a Q-Route (e.g. D to C to B to A), expressed as the angular distance from true north. It is usually measured from 0 at the reference direction clockwise through 360 (modified IHO Dictionary, S-32, 5th Edition, 435)


The minimum (shoalest) value of a depth range. (S-57 Annex , Appendix A, IHO Catalogue)

ESB, RAL, MFF CLB

Unit: defined in the DUNI subfield of the DSPM record or in the DUNITS attribute of the M_UNIT meta object class, e.g. metre (m)Resolution: 0.1 m or 0.1 fm or 0.1 ftFormat: sxxxxx.x s: sign, negative values only.

The maximum (deepest) value of a depth range. (S-57 Annex , Appendix A, IHO Catalogue)

ESB, RAL, MFF CLB

Unit: defined in the DUNI subfield of the DSPM record or in the DUNITS attribute of the M_UNIT meta object class, e.g. metre (m)Resolution: 0.1 m or 0.1 fm or 0.1 ftFormat: sxxxxx.x s: sign, negative values only.



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Detection Probability The estimated probability of detecting a mine. (AML) R ESB dtprob 20655 Value between 0 and 1 F

Diver’s Thrust Test Depth The depth to which a diver is able to thrust his arm. (AML) I ESB dttdep 20524 E

Diver’s Thrust Test Number I ESB dttnum 20525 Integer value in the range of 1 to 4 I

Depth units Unit of measurement for depths (AML) I DUNITS 89 E S-57 Attribute

Elevation I ELEVAT 90 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Absolute Vertical Accuracy R elvacc 22489 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F

Error Ellipse S errell 22485 Encodes in triplets: The semi-major, semi-minor and orientation of the error ellipse.Orientation is expressed as the true bearing of the major axis. A Generic AML Attribute

Estimated Range of Transmission R RAL ESTRNG 91 nautical miles F S-57 Attribute

Exhibition Condition of Light Exhibition Condition of Light I ESB EXCLIT 92 E S-57 Attribute

Exit Usability I ESB exitus 20528 E

Exposition of Sounding Relationships of the sounding to its surroundings. (AML) I CLB EXPSOU 93 E S-57 Attribute

Exit Description S ESB extdes 20624 Text string S

Existence of Restricted Area I LBO exzres 20688 E

Field Name S LBO fldnam 20529 Text string S

Foliar Index R ESB folinx 20533 cm2 F

Function Function S ESB FUNCTN 94 L S-57 Attribute

Gas Content I ESB gascon 20534 Percentage I

General Water Depth I gendep 20535 The general depth should be encoded using an integer numeric value up to 4 digits. I

Gradient I ESB gradnt 20536 E

Grain Size Grain size of the sediment. (AML) R ESB grnsiz 20537 millimetres F

Height R HEIGHT 95 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) F S-57 Attribute Height must not be used for floating objects

HF Bottom Loss R ESB hfbmls 20653 dB F

Relative Horizontal Accuracy S HORACC 97 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Horizontal Clearance R ESB HORCLR 98 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) F S-57 Attribute

Horizontal Length R HORLEN 99 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Horizontal Width R HORWID 100 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute


501 = A: Clenched fist - arm penetrates to shoulder. (AML)502 = B: Clenched fist - arm penetrates to elbow. (AML)503 = C: Clenched fist - arm penetrates to wrist. (AML)504 = D: Extended fingers - hand penetrates to palm. (AML)505 = E: Extended fingers - hand penetrates to knuckles. (AML)506 = F: No penetration. (AML)701 = Unknown:703 = Not Applicable:


Number of arm thrusts required to bury to the shoulder. (AML)



1 = metres: depths are specified in metres (SI units of length).(S-57 Annex A,Appendix A, Chapter 2 Attributes)2 = fathoms and feet: depths are specified in fathoms (units of six feet of depth) and feet.(S-57 Annex A,Appendix A, Chapter 2 Attributes)3 = feet: depths are specified in feet (imperial units of length).(S-57 Annex A,Appendix A, Chapter 2 Attributes)4 = fathoms and fractions: depths are specified in fathoms (units of six feet of depth) and fractions of fathoms.(S-57 Annex A,Appendix A, Chapter 2 Attributes)701 = Unknown:703 = Not Applicable:704 = Other:

The altitude of the ground level of an object, measured from a specified vertical datum. (S-57 Annex , Appendix A, IHO Catalogue)

ESB, RAL, MFF

The vertical error estimate for a single point, relative to the specified spatial reference system (AML)


new meta attribute

Generic AML attributeThe expected input is the maximum value of the one-dimensional error. The error is assumed to be positive and negative. The plus/minus character shall not be encoded.

Also known as the Figure of Merit. 95% 2sigma value - semi-major and semi-minor axes of error ellipsoid plus orientation. (AML)

ESB, LBO, MFF, RAL, SBO

new spatial attribute

The estimated range of a non-optical electromagnetic transmission.

The estimated range (distance) distance assumes 'in vacuo' transmission and a standard antenna height of 5 metres. Thus it gives a hint to the mariner whether he is likely to receive transmission at a certain distance from an object carrying this attribute

1 = light shown without change of character: A light shown throughout the 24 hours without change of character. (IHO Specifications, M-4)2 = daytime light: A light which is only exhibited by day. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = fog light: A light which is exhibited in fog or conditions of reduced visibility. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = night light: A light which is only exhibited at night. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:703 = Not Applicable:704 = Other:

Usability of exits from beach for vehicles and infantry (AML)

501 = Excellent: Vehicles and infantry can cross any part of the back of the beach without restriction or hindrance. (AML)502 = Good: A number of vehicles can drive easily from the beach at the same time through a number of exits. Infantry can leave the beach and move inland without difficulty, along much of the beach. (AML)503 = Fair: Exits are becoming fewer and smaller, usually accepting only one vehicle at a time. Infantry may be restricted to some extent by dense undergrowth, swamp, cliff, etc along part of the back of the beach. (AML)504 = Poor: Exits for vehicles and infantry are severely restricted in number and quality. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


1 = within the range of the surrounding depth area: the depth corresponds to the depth range of the surrounding depth area. i.e. the depth is not shoaler than the minimum depth of the surrounding depth area or deeper than the maximum depth of the surrounding depth area.2 = shoaler than the range of depth of the surrounding depth area: the depth is shoaler than the minimum depth of the surrounding depth area.3 = deeper than the range of depth of the surrounding depth area: the depth is deeper than the maximum depth of the surrounding depth area.701 = Unknown:703 = Not Applicable:

Description of exits from an area used for air landing purposes. (AML)


Indication that a restricted area exists around the object. (AML)

501 = yes: a restricted area exists around the object. (AML)502 = no: a restricted area does not exist around the object. (AML)


If value 1 of the attribute is encoded, this should indicate to a GIS that the point object lies within an associated area object and that if required, the system should be directed to locate the said area, it being defined from the same spatial point.

The name given to a group of reservoirs yielding oil or gas, which the installation is involved in extracting. (Adapted from An A-Z of Offshore Oil & Gas by Harry Whitehead, 2nd Ed, 1983, Gulf Publishing Company)


The surface value (in square centimetres) of one significant leaf, which is obtained by multiplying the leaf length by the leaf width. (AML)


2 = harbour-masters office: The office of the local official who has charge of mooring and berthing of vessels. (Adapted from IHO Dictionary, S-32, 5th Edition, 2191)3 = custom office: An office which is charged with enforcing customs regulations. (S-57 Annex A, Appendix A, IHO Object Catalogue)4 = health office: The office which is charged with the administration of health laws and sanitary inspections. (Adapted from the New Shorter Oxford English Dictionary, 1993)5 = hospital: An institution or establishment providing medical or surgical treatment for the ill or wounded. (The New Shorter Oxford English Dictionary, 1993)6 = post office: The public department, agency or organisation responsible primarily for the collection, transmission and distribution of mail. (The New Shorter Oxford English Dictionary, 1993)7 = hotel: An establishment, especially of a comfortable or luxurious kind, where paying visitors are provided with accommodation, meals and other services. (Adapted from the New Shorter Oxford English Dictionary, 1993)8 = railway station: A building with platforms where trains arrive, load, discharge and depart. (Adapted from the New Shorter Oxford English Dictionary, 1993)9 = police station: The office of the local police force. (S-57 Annex A, Appendix A, IHO Object Catalogue)10 = water police station: The headquarters of a local water-police force. (S-57 Annex A, Appendix A, IHO Object Catalogue)11 = pilot office: The office or headquarters of pilots; the place where the services of a pilot may be obtained. (IHO Dictionary, S-32, 5th Edition, 3845)12 = pilot lookout: A distinctive structure on shore from which personnel keep watch upon events at sea or along the coast. (IHO Dictionary, S-32, 5th Edition, 2917)

Gas content of the sediment expressed as a percentage. (AML)


The general depth of the water in the vicinity of the object. (AML)

SBO, LBO


The change of any quantity with distance in any given direction. (IHO Dictionary, S-32, 5th Edition, 2062.)

501 = Steep: > 1:15502 = Moderate: 1:15 - 1:30503 = Gentle: 1:30 - 1:60 504 = Mild: 1:60 - 1:120 505 = Flat: < 1:120 701 = Unknown:703 = Not Applicable:704 = Other:



Value of the vertical distance to the highest point of the object, measured from a specified vertical datum.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, MFF LBO

The loss of high frequency sonar signal from the geological layer. (AML)


The horizontal error estimate for the distance between two points, or the accuracy of one point with respect to another


Generic AML attributeThe expected input is the radius of the two-dimensional error. The error is assumed to be positive and negative. The plus/minus character shall not be encoded.

The width of an object, such as a canal or a tunnel, which is available for safe navigation. This may, or may not, be the same as the total physical width of the object. (S-57 Annex A, Appendix A, IHO Object Catalogue)

A measurement of the longer of the two linear axis. (Digital Geographic Information Working Group - DGIWG, Oct 87.)

ESB LBO SBO

A measurement of the shorter of the two linear axis. (Digital Geographic Information Working Group - DGIWG, Oct 87.)

ESB LBO


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Height/Length Units Unit of measurement for heights and lengths. (AML) I HUNITS 96 E

Contour Type Type of depth contour. (AML) I CLB hypcat 20615 E

ICAO code S RAL icaocd 20719 four letter text string or comma separated list S added at v2.0

Ice Attribute Concentration Total I ESB iceact 20696 E

Ice Advisory Code S RAL iceadc 20698 Text string S

Icedrift or Iceberg Direction I ESB icebdr 20707 E

Number of Icebergs in Area I ESB icebnm 20699 The number of icebergs in an area expressed by a density measurement on the basis of a grid I

Iceberg Shape I ESB icebsh 20706 E

Icedrift or Iceberg Speed R ESB icebsp 20708 A numeric value of the speed of the icedrift or iceberg expressed in knots. F

Iceberg Size I ESB icebsz 20705 E

Ice Coverage Type I ESB icecvt 20716 E

Ice Factor R ESB ICEFAC 101 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Ice Line Category I ESB icelnc 20700 E

Land Ice I ESB icelnd 20712 E

Ice Lead Status I ESB icelst 20704 E

Ice Lead Type I ESB icelty 20703 E


1 = metres: heights/lengths are specified in metres (SI units of length).(S-57 Annex A, Appendix A, Chapter 2 Attributes)2 = feet: heights/lengths are specified in feet (imperial units of length).(S-57 Annex A,Appendix A, Chapter 2 Attributes)501 = international nautical mile: A unit of length equal to 1,852 METRES. This value was approved by the International Hydrographic Conference of 1929 and has been adopted by nearly all maritime states.(AML)502 = cable: a unit of distance originally equal to the length of a ship's anchor cable, but now generally considered to be about 600 feet. In the British Navy it is 608 feet, or exactly one-tenth of a nautical mile.503 = yard: a unit of length equal to 3 feet, 36 inches, or 0.9144 metre.701 = Unknown:703 = Not Applicable:704 = Other:


additional values

502 = Index: Unbroken contour lines. (AML)503 = Intermediate: Contour values that do not satisfy the criteria of index contours. These may be broken. (AML)504 = Supplementary: Often used to aid the representation of flatter areas. These may occur in some areas of the product but not others. (AML)701 = unknown: The type of contour is unknown. (AML)703 = Not Applicable:704 = Other:


The intermediate and supplementary categories are included where CLB is generated from current paper based products. It is likely that their use will diminish with time.

An airfield unique location identifier designated by the International Civil Aviation Organisation (ICAO document 7910)


Specifies the total concentration of ice in an area. This attribute represents the ratio expressed in tenths describing the area of the water surface covered by ice as a fraction of the whole area. (ECDIS Ice Objects Version 3.0)

501 = 1/10502 = 2/10503 = 3/10504 = 4/10505 = 5/10506 = 6/10507 = 7/10508 = 8/10509 = 9/10510 = <1/10 - 2/10511 = 1/10 - 3/10512 = 4/10 - 6/10513 = 7/10 - 8/10514 = 9/10 - <10/10515 = 10/10 with openings (Often called 9+/10)516 = 10/10 without openings517 = <1/10701 = Undetermined or Unknown703 = Not Applicable:


The Ice Advisory Code describes hazardous ice conditions that may impair navigation (ECDIS Ice Objects Version 3.0)


A concise message about hazardous ice conditions

Indicates the direction in which an icemass is drifting. (ECDIS Ice Objects Version 3.0)

501 = No ice motion502 = Ice drift to NE503 = Ice drift to E504 = Ice drift to SE505 = Ice drift to S506 = Ice drift to SW507 = Ice drift to W508 = Ice drift to NW509 = Ice drift to N510 = Variable701 = Undetermined/Unknown703 = Not Applicable:


Indicates the number of icebergs in an area expressed by a density measurement on the basis of a grid. (ECDIS Ice Objects Version 3.0)


The area is defined by the dimensions of one degree latitude by one degree longitude and the attribute will be limited to 80 degrees North or South due to distortion at the poles Although measurements are not taken, areas that contain icebergs usually contain bergy bits and growlers.

Indicates the shape of the iceberg. (ECDIS Ice Objects Version 3.0)

501 = Tabular502 = Domed503 = Pinnacled504 = Wedged505 = Dry-docked506 = Blocky701 = Undetermined/Unknown703 = Not Applicable:704 = Other:


Describes the speed at which an icemass is travelling. (ECDIS Ice Objects Version 3.0)


Iceberg speed is determined in knots to maintain consistency with the 'Current Velocity' attribute speed

Categorises the size of an iceberg (ECDIS Ice Objects Version 3.0)

501 = Growler502 = Bergy Bit503 = Small Iceberg504 = Medium Iceberg505 = Large Iceberg506 = Very Large Iceberg507 = Ice Island Fragment508 = Ice Island509 = Radar Target701 = Unknown:703 = Not Applicable:704 = Other:


Indicates the type of ice coverage in an area (ECDIS Ice Objects Version 3.0)

501 = Ice Shelf502 = Fast Ice503 = Fast Ice, Old504 = Fast Ice, Second Year505 = Fast Ice, Multi-Year506 = Consolidated Pack Ice, Compact507 = Very Close Pack Ice508 = Close Pack Ice509 = Open Pack Ice510 = Very Open Pack Ice511 = Open Water512 = Bergy Water513 = Presence of New Ice514 = Level Ice701 = Unknown:703 = Not Applicable:704 = Other:


The value of the maximum variation in the vertical clearance of an overhead cable due to an accumulation of ice. (S-57 Annex , Appendix A, IHO Catalogue)

The Ice Line Category indicates the limits of the ice-infested waters or boundaries between the areas of different types of concentrations. (ECDIS Ice Objects Version 3.0)

501 = Limit of Undercast/Data Limit502 = Ice Edge from Radar503 = Limit of Radar Observation504 = Limit of Visual Observation505 = Observed Edge or Boundary506 = Estimated Edge or Boundary507 = Iceberg Limit701 = Undetermined/Unknown703 = Not Applicable:704 = Other:


Land ice refers to the type of ice of land origin. (ECDIS Ice Objects Version 3.0)

501 = Glacial Ice: Ice in or originating from a glacier, whether on land or floating on the sea as icebergs, bergy bits, growlers or ice islands. (ECDIS Ice Objects Version 3.0)502 = Glacial Tongue: Projecting seaward extension of a glacier, usually afloat. (ECDIS Ice Objects Version 3.0)503 = Ice Shelf: A floating ice sheet of considerable thickness showing 2m or more above sea level, attached to the coast.701 = Undetermined or Unknown:703 = Not Applicable:704 = Other:


Indicates the surface nature of the lead (ECDIS Ice Objects Version 3.0)

501 = Open Lead502 = Frozen Lead701 = Undetermined or Unknown703 = Not Applicable:704 = Other:


Indicates the type of lead (ECDIS Ice Objects Version 3.0)

501 = Lead: Any fracture or passageway through ice which is navigable by surface vessels.(ECDIS Ice Objects Version 3.0)502 = Shore Lead: A Lead between ice and the shore or between ice and an ice front. (ECDIS Ice Objects Version 3.0)503 = Flaw Lead: A passage-way between ice and fast ice which is navigable by surface vessels. (ECDIS Ice Objects Version 3.0)701 = Unknown:703 = Not Applicable:704 = Other:



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Maximum Ice Thickness R ESB icemax 20709 A numeric value indicating the maximum thickness of the ice in centimetres at the sample location. F

Minimum Ice Thickness R ESB icemin 20710 A numeric value indicating the minimum thickness of the ice in centimetres at the sample location. F

Ice Polynya Status I ESB icepst 20702 E

Ice Polynya Type I ESB icepty 20701 E

Ice Ridge Development I ESB icerdv 20711 E

Ice Stage of Development I ESB icesod 20697 E

Identification The secondary name or identifier of an object. (AML) S RAL identy 20678 Text string S

Inclination R incltn 20538 degrees F

Industry S ESB indtry 20625 Text string S

Supporting Textual Information S INFORM 102 Text string S S-57 Attribute Generic AML attribute

Jurisdiction I JRSDTN 103 E

Layer Number I ESB laynum 20546 I

Lay Platform The type of unit that laid the mine (AML) I SBO layptm 20543 E

Lay Reference Number S SBO layrfn 20544 Text string S

Lay Time Date and time a mine has been laid. (AML) S SBO laytim 20545 A

Legal Status Classification of the area with respect to the law. (AML) S ESB legsta 20547 Text string S

LF Bottom Loss R ESB lfbmls 20654 dB F

Width (left) R RAL lftwid 20613 defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object or geo object class, e.g. nautical mile (NM) F

Lifting Capacity R ESB LIFCAP 106 Tonnes F S-57 Attribute

Limit of Anchors and Chains R MFF limanc 20692 Defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M-UNIT meta object class. F

Interpolated line characteristic I RAL linech 20677 E

Light Characteristic Light characteristic I LITCHR 107 E S-57 Attribute

Light Visibility S ESB LITVIS 108 L S-57 Attribute

Landing Conditions S ESB lndcon 20626 Text string S

Logistics Handling and supply facilities of the location. (AML) S ESB logtcs 20628 L

Leisure Activity Type of leisure activity taking place. (AML) S ESB lsract 20627 Text string S

Magnetic Anomaly Detector (MAD) Signature I madsig 20549 E

Strength of Magnetic Anomaly I magany 20594 E

Magnetic Intensity Magnetic intensity generated by the object. (AML) I magint 20550 nanoTesla I

Specifies the maximum thickness of the ice. (ECDIS Ice Objects Version 3.0)


The accuracy of this measurement is approximately 10% (ie within 5 cm for the first 30cm of thickness and within 10cm for measurements up to 1.5m

Specifies the minimum thickness of the ice (ECDIS Ice Objects Version 3.0)


The accuracy of this measurement is approximately 10% (ie within 5 cm for the first 30cm of thickness and within 10cm for measurements up to 1.5m

Indicates the nature of the polynya (ECDIS Ice Objects Version 3.0)

501 = Non-Recurring Polynya502 = Recurring Polynya: A polynya which recurs in the same position every year. (ECDIS Ice Objects Version 3.0)


Describes the presence and type of a polynya. (ECDIS Ice Objects Version 3.0)

501 = Polynya: Any non-linear shaped opening enclosed by ice. (ECDIS Ice Objects Version 3.0)502 = Shore Polynya: A polynya between ice and the coast or between ice and an ice front. (ECDIS Ice Objects Version 3.0)503 = Flaw Polynya: A polynya between ice and fast ice. (ECDIS Ice Objects Version 3.0)701 = Unknown:703 = Not Applicable:704 = Other:


Describes the type of ridges present. (ECDIS Ice Objects Version 3.0)

501 = New Ridge502 = Weathered503 = Very Weathered Ridge504 = Aged Ridge505 = Consolidated Ridge701 = Undetermined or Unknown703 = Not Applicable:704 = Other:


Describes the ages and thicknesses of the ice. (ECDIS Ice Objects Version 3.0)

501 = No ice present502 = New ice (Typical thickness of sea for Ice Stage of Development: <10cm)503 = Nilas, ice rind (Typical thickness of sea for Ice Stage of Development: <10cm)504 = Young ice (Typical thickness of sea for Ice Stage of Development: 10-30cm)505 = Grey ice (Typical thickness of sea for Ice Stage of Development: 10-15cm)506 = Grey-white ice (Typical thickness of sea for Ice Stage of Development: 15-30cm)507 = First-year ice (Typical thickness of sea for Ice Stage of Development: >30cm)508 = Thin first year ice (Typical thickness of sea for Ice Stage of Development: >30-70cm)509 = Medium first year ice (Typical thickness of sea for Ice Stage of Development: 70-120cm)510 = Thick first year ice (Typical thickness of sea for Ice Stage of Development: >120cm)511 = Old ice512 = Second Year Ice513 = Multi year ice514 = Ice of land origin701 = Undetermined or unknown703 = Not Applicable:704 = Other:



The angle, measured from the horizontal, at which the object rests on the sea floor. (AML)

SBO, LBO


Information on the industries including potential hazards. (AML)


Supporting (free text) information relevant to the object that cannot be explicitly encoded by any other attribute.


The jurisdiction applicable to an administrative area. (S-57 Annex A, Appendix A, IHO Catalogue)

MFF, RAL

1 = International: involving more than one country; covering more than one national area.2 = National: an area administered or controlled by a single nation.3 = National sub-division: an area smaller than the nation in which it lies.501 = NATO: an area administered or controlled by NATO701 = Unknown:703 = Not Applicable:704 = Other:


additional values

Number of geological layer, ascending from the lowest identified layer. (AML)

Value: min 1Units: noneResolution: 1


501 = Vessel: A craft or structure for transport by water. (Adapted from Chambers Concise Dictionary)502 = Aircraft: Any structure or machine for travelling in the air. (Adapted from Chambers Concise Dictionary)


A number allocated to an individual mine by the minefield planning authority. (AML)


The `lay time' will consist of a date and a time separated by a capital "T".The date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) and 2 digits for the day (DD). The time should be encoded using 2 digits for the hour (hh) and 2 digits for the minutes (mm). �



The loss of low frequency sonar signal from the geological layer. (AML)


The left-hand channel width of a Q-Route expressed as the measurement taken from the route centreline to the channel limit when proceeding UP a Q-route (e.g. A to B to C to D). (AML)


The specified direction of a feature must be encoded using the ORIENT attribute.

The specific safe lifting capacity of an object. (S-57 Annex A, Appendix A, IHO Object Catalogue)The radius of a circular area, originating at the object's position or centre, within which the existence of chains and/or anchors are considered to be a hazard. (AML)


The characteristics of a line used during interpolation between two points.

501 = Geodetic: Geodesic: The shortest line on the spheroid joining two points (Geodesy, G.Bomford, 4th Ed. 1980)502 = Loxodrome: A line of constant azimuth (Map Projections, US Geological Survey, J.P.Snyder, 2nd Ed. 1983)701 = Unknown:703 = Not Applicable:


ESB, MFF

1 = fixed: A signal light that shows continuously, in any given direction, with constant luminous intensity and colour. (IHO Dictionary, S-32, 5th Edition, 2780)2 = flashing: A rhythmic light in which the total duration of the light in a period is clearly shorter than the total duration of darkness and all the appearances of light are of equal duration. (IHO Dictionary, S-32, 5th Edition, 2783)3 = long-flashing: A flashing light in which a single flash of not less than two seconds duration is regularly repeated. (IHO Dictionary, S-32, 5th Edition, 2796)4 = quick-flashing: A light exhibiting without interruption very rapid regular alternations of light and darkness. (IHO Dictionary, S-32, 5th Edition, 2803)5 = very quick-flashing: A flashing light in which flashes are repeated at a rate of not less than 80 flashes per minute but less than 160 flashes per minute.6 = ultra quick-flashing: A flashing light in which flashes are repeated at a rate of not less than 160 flashes per minute.7 = isophased: A light with all durations of light and darkness equal. (IHO Dictionary, S-32, 5th Edition, 2779)8 = occulting: A rhythmic light in which the total duration of light in a period is clearly longer than the total duration of darkness and all the eclipses are of equal duration. (IHO Dictionary, S-32, 5th Edition, 2801)

The specific visibility of a light, with respect to the light's intensity and ease of recognition.(S-57 Annex A, Appendix A, IHO Object Catalogue)

1 = high intensity: Non-marine lights with a higher power than marine lights and visible from well off shore (often `Aero' lights). (adapted from IHO Chart Specifications, M-4)2 = low intensity: Non-marine lights with a lower power than marine lights. (Bundesamt für Seeschiffahrt und Hydrographie, Germany)3 = faint: A decrease in the apparent intensity of a light which may occur in the case of partial obstructions. (IHO Chart Specifications, M-4)4 = intensified: A light in a sector is intensified (i.e. has a longer range than other sectors). (Bundesamt für Seeschiffahrt und Hydrographie, Germany)5 = unintensified: A light in a sector is unintensified (i.e. has a shorter range than other sectors). (Bundesamt für Seeschiffahrt und Hydrographie, Germany)6 = visibility deliberately restricted: A light sector is deliberately reduced in intensity, for example to reduce its effect on a built up area. (S-57 Annex A, Appendix A, IHO Object Catalogue)7 = obscured: Said of the arc of a light sector designated by its limiting bearings in which the light is not visible from seaward. (IHO Dictionary, S-32, 5th Edition, 3492)8 = partially obscured: This value specifies that parts of the sector are obscured. (S-57 Annex A, Appendix A, IHO Object Catalogue)701 = Unknown:702 = Multiple:

Description of the landing conditions including surface composition and immediate topographical features. (AML)


501 = Bunker: 502 = Crane:503 = Road: 504 = Supplies: 505 = Water:



Indication of the strength of the Magnetic Anomaly Detector reading caused by the object. (AML)

SBO, LBO

501 = nil: the object has no magnetic anomaly detector reading. (AML)502 = slight: the object has a slight magnetic anomaly detector reading. (AML)503 = moderate: the object has a moderate magnetic anomaly detector reading. (AML)504 = strong: the object has a strong magnetic anomaly detector reading. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


Indication of the strength of the magnetic anomaly caused by the object. (AML)

SBO, LBO

501 = nil: the object generates no magnetic anomaly. (AML)502 = slight: the object generates a slight magnetic anomaly. (AML)503 = moderate: the object generates a moderate magnetic anomaly. (AML)504 = strong: the object generates a strong magnetic anomaly. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


SBO, LBO



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Manoeuvring S ESB manvrg 20629 Text string S

Marks Navigational - System of Marks Navigational - System of I MARSYS 109 E S-57 Attribute

Maximum altitude I RAL maxalt 20671 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) I

Maximum Flight Level I RAL maxftl 20673 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) I

MGS Type I ESB mgstyp 20695 E

Mine-Hunting Classification Classification of profile of the sea bed. (AML) I ESB mhclas 20558 E

Migration Direction Direction of movement of feature. (AML) I ESB migdir 20552 degrees I

Migration Speed Speed of movement of feature. (AML) R ESB migspd 20553 metres per day F

Type of military activity Type of military activity or activities associated with area S RAL milact 20605 L

Milec Density Density of mine-like echoes per square mile. (AML) I ESB milden 20554 E

Minimum altitude I RAL minalt 20672 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) I

Minimum Safe Depth R RAL mindep 20676 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) I

Mine Reference Number S SBO minern 20557 The mine reference number consists of the last two or three letter's of the ship's international call sign followed by a two figure number allocated by the ship. S

Minimum Flight Level I RAL minftl 20674 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) I

Mission Classification Classification of the mission that found the object. (AML) I SBO miscls 20561 E

Mission Comments S SBO miscom 20562 Text string S

Mission Date Date of the mission that found the object. (AML) S SBO misdat 20563 The mission date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). A

Mission Name S SBO misnme 20564 Text string S

Military Load Classification I ESB mlclas 20694 E

Multiplicity of Lights I ESB MLTYLT 110 Unit: none I S-57 Attribute

Minehunting System S SBO mnhsys 20559 Text string S

Manoeuvring required for the boat to get into position. (AML)


ESB, MFF

1 = IALA A: Navigational aids conform to the International Association of Lighthouse Authorities - IALA A system. 2 = IALA B: Navigational aids conform to the International Association of Lighthouse Authorities - IALA B system 9 = no system: Navigational aids do not conform to any defined system. 10 = other system: Navigational aids conform to a defined system other than International Association of Lighthouse Authorities - IALA. 701 = Unknown:703 = Not Applicable:

Height (AGL - above ground level) above surface level to the highest portion of the feature (modified FACC - AV2)


A maximum surface of constant atmospheric pressure which is related to a specific pressure datum, (1,013.2 hectopascal (hPa) or 29.92 inches) and is separated from the consecutive flight levels by a pressure interval corresponding to 500 feet (152.4 m.) - (FACC - FL2)


Classification of the seabed using Marine Geophysical Survey values. (AML)Note: this attribute must only be used where more detailed information that could populate the attribute Nature of Geological Layer is not available. MGS Type and Nature of Geological Layer must not be used on the same object.

501 = 1: Hard bottom (till, also bedrock)502 = 2: Hard bottom and sand bottom equally distributed.503 = 3: Sand bottom (sand and gravel)504 = 4: Sand bottom with minor soft bottom areas505 = 5: Sand bottom and soft bottom equally distributed506 = 6: Soft bottom (silt, clay and mud)507 = 7: Soft bottom with minor hard bottom outcrops508 = 8: Soft bottom and hard bottom equally distributed509 = 9: Hard bottom with minor soft bottom areas701 = 0: Unknown703 = Not Applicable:


Note: this attribute must only be used where more detailed information that could populate the attribute Nature of Geological Layer is not available. MGS Type and Nature of Geological Layer must not be used on the same object.

501 = A: Smooth - Very few craters, gullies, ridges or seaweed patches (5% of the area or less), sand ripples 150mm high or less. (AML)502 = B: Moderate - Large numbers of craters, gullies, ridges or seaweed patches (5 to 15% of the area), sand ripples 150 to 300 mm high. (AML)503 = C: Rough - Extensive areas (over 15% of the whole) of craters etc., or large sand ripples or closely spaced sandwaves. (AML)504 = D: Very Rough - very extensive areas (over 50% of the whole). (AML)701 = Unknown:703 = Not Applicable:




501 = AA Anti Aircraft (gound to air) 502 = A/A High and Low angle gunnery (ground to ground): 503 = AAF Air to Air Firing 504 = ACT Air Combat Training: 505 = ADT Air Dropped Torpedo: 506 = AIR Aircraft General: 507 = ASF Air to Surface Firing: 508 = ASW Anti Submarine Warfare Exercises:509 = AT Acoustic Trials: 510 = ATT Air Tactical Training: 511 = B Bombing: 512 = DC Depth Charge dropping/firing, (including rocket/mortar fired DC): 513 = DG Degaussing: 514 = DUO Demolition of unexploded ordnance: 515 = ET Explosives Trials: 516 = F Firing: 517 = Fl Flares: 518 = Gl Glow Worm: 519 = GP General Practice: 520 = GW Guided weapons (air flight) 521 = H Helicopter exercises: 522 = HEM High Energy manoeuvres: 523 = HMS HM Ships (non firing exercises, practices and trials): 524 = LAF Live ASW firing: 525 = MCM Mine Counter Measures: 526 = MD Mine disposal: 527 = MI Missile Firing: 528 = MO Mortar Firing: 529 = NGS Naval Gunfire Support:530 = NR Noise Ranging: 531 = P Parachute Dropping: 532 = PTA Pilotless target aircraft: 533 = RTB Radar Training Buoy: 534 = SE Submarine Exercises: 535 = Sm Smoke: 536 = SD Sonarbuoy dropping: 537 = SS Starshell: 538 = STT Surface Target Towing: 539 = SU Surface to Surface Firings:


501 = 0: No data available. (AML)502 = 1: Light - 1-20 Milecs/sq mile. (AML)503 = 2: Medium - 21-40 Milecs/sq mile. (AML)504 = 3: Heavy - 41-70 Milecs/sq mile. (AML)505 = 4: 71 Milecs/sq mile and more. (AML)701 = Unknown:703 = Not Applicable:


Height (AGL - above ground level) above surface level to the lowest portion of the feature (modified FACC - AV1)


The minimum safe depth (MSD) applicable to a submarine of a specified height proceeding at a given rate of knots that should normally be used for planning purposes (AML)


Reference number of object classified as a mine,consisting of the last two or three letter's of the ship's international call sign followed by a two figure number allocated by the ship. (AML)


A minimum surface of constant atmospheric pressure which is related to a specific pressure datum, (1,013.2 hectopascal (hPa) or 29.92 inches) and is separated from the consecutive flight levels by a pressure interval corresponding to 500 feet (152.4 m.) - (FACC - FL1)


501 = Nato Secret502 = Nato Confidential503 = Nato Restricted504 = Unclassified701 = Unknown:703 = Not Applicable:704 = Other:


Textual information relating to the mission that found the object. (AML)



Name of exercise or operation taking place when the object was found. (AML)


Class number which represents the safe load carrying capacity of the object and indicates the maximum vehicle class that can be accepted under normal conditions. (Adapted from NATO STANAG 2174)

501 = 4502 = 8503 = 12504 = 16505 = 20506 = 24507 = 30508 = 40509 = 50510 = 60511 = 70512 = 80513 = 90514 = 100515 = 120516 = 150701 = Unknown:703 = Not Applicable:704 = Other:


The number of lights of identical character that exist as a co-located group.(S-57 Annex A, Appendix A, IHO Object Catalogue)The method of minehunting employed by the vessel that found the object. (AML)



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Mine Index Mine Case Information on the mine body.(AML) I SBO mnimnc 20555 L

Mine Index Mine Type Information on the type of mine. (AML) I SBO mnimnt 20556 L

Minesweeping System S SBO mnssys 20560 Text string S

Mine Threat Density The estimated density of mines. (AML) I ESB mntden 20630 mines/m2 I

Mean Shear Strength Pressure required to deform the sediment. (AML) R ESB msstrg 20551 kilograms/metre2 F

Multiple Contacts I SBO mulcon 20631 Value between 1 and 99 I

MWDC Reference Number S SBO mwdcrn 20565 Text string S

Category of bedrock N/A N/A N/A N/A 20498 N/A N/A N/A N/A

Category of regulated airspace N/A N/A N/A N/A 20509 N/A N/A N/A N/A

Depth Depth measured from the Sounding Datum (AML) R CLB N/A N/A See comments N/A N/A

Internal Data Record Identification Number N/A N/A N/A N/A 20539 N/A N/A N/A N/A

Object classes N/A N/A N/A N/A 22486 N/A N/A N/A N/A

Safety Zone N/A N/A N/A N/A 20580 N/A N/A N/A N/A

Security classification N/A N/A N/A N/A 22487 N/A N/A N/A N/A

Unique ID from a Navigational Product N/A N/A N/A N/A 20609 N/A N/A N/A N/A

Nature of Construction S NATCON 112 L S-57 Attribute

Nationality S NATION 111 A S-57 Attribute

Nature of Geological Layer _ Qualifying Terms S ESB NATQUA 114 L S-57 Attribute

Surface Composition - Qualifying Terms S LBO NATQUA 114 L S-57 Attribute

Nature of Geological Layer I ESB natsed 20566 E

Surface Composition S LBO NATSUR 113 L S-57 Attribute

Navigational Description S ESB navdes 20632 Text string S

Navigational Difficulty I ESB navdif 20633 E

Navigation System S SBO navsys 20567 Text string S

S NINFOM 300 Text string S S-57 Attribute Generic AML attribute

Number of Previous Observations Number of times the object has been reported. (AML) I SBO nmprob 20570 Integer value I

501 = 0: No information on the mine body502 = 1: Moored mine503 = 2: Shallow moored mine504 = 3: Deep moored mine505 = 4: Ground mine506 = 5: Ground mine - explosive charge of less than 500kg507 = 6: Ground mine - explosive charge of 500kg or greater508 = 7: Contact classified as `mine-like'509 = 8: Obstructors510 = 9: Moving mines701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


501 = A: Contact - requires physical contact with the target to trigger actuation - AML502 = B: Antenna - generally takes the form of a special section in the mooring cable, and/or special cable suspended above the mine by float. When touched by a ferrous object sets up galvanic action to fire the mine. ATP-6(C) VOL 1 Glossary503 = C: Influence - actuated the effect of a target on some physical condition in the vicinity of the mine, or on radiations emanating from the mine - ATP-6(C) VOL Glossary504 = D: Acoustic - responds to the acoustic field of a ship or sweep - ATP-6(C) VOL 1 Glossary505 = E: Acoustic Audio Frequency - responds to the acoustic field of a ship or sweep between 30 Hz and 1500 Hz - ATP-6(C) VOL 1 Glossary506 = F: Acoustic Low Frequency - responds to the low frequency (as defined by NSA) acoustic field of a ship or sweep - AML507 = G: Acoustic High Frequency - responds to the high frequency (as defined by NSA) acoustic field of a ship or sweep - AML508 = H: Passive - does not emit a signal to detect the presence of a target - ATP-6(C) VOL 1 Glossary509 = I: Pressure - responds to the hydrodynamic pressure field of a target - ATP-6(C) VOL 1 Glossary510 = J: Magnetic - responds to the magnetic field of a ship, submarine, or sweep - ATP-6(C) VOL 1 Glossary511 = K: Magnetic H (Horizontal Component) - responds to horizontal component of the magnetic field of a ship, submarine, or sweep- AML512 = L: Magnetic V (Vertical Component) - responds to the vertical component of the magnetic field of a ship, submarine, or sweep - AML


The method of minesweeping employed by the vessel that found the object. (AML)




Where the object consists of multiple contacts on a small area. (AML)


Reference number used by the Minewarfare Data Centre. (AML)

new feature attributeobsolete attribute

Code used in early drafts of Product Specification only - now deleted

obsolete attribute


hdp

hdh

Hydrographic Depth: The depth of the feature below water, measured from the top or surface of the feature, referenced to aspecified vertical datum. Recorded values are positive numbers.Hydrographic Drying Height: The height of the feature, which tidal waters cover and uncover, referenced to a specified vertical datum.

In S-57 encapsulationb, the value of the sounding is encoded in the 3-D Coordinate field of the Spatial Record Structure (seeS-57 Part 3).Drying heights (drying soundings) are indicated by a negative value.

obsolete attribute


obsolete attribute


obsolete attribute


obsolete attribute


obsolete attribute


The material(s) used to make the object.(S-57 Annex A, Appendix A, IHO Object Catalogue)

ESB, LBO, SBO, MFF

1 = masonry: Constructed from brick or stone. (S-57 Annex A, Appendix A, IHO Object Catalogue)2 = concreted: Constructed of concrete, a material made of sand and gravel that is united by cement into a hardened mass used for foundations etc. (Adapted from the Illustrated Contemporary Dictionary, Encyclopaedic Edition, 1978)3 = loose boulders: Constructed from large stones or blocks of concrete, often placed loosely for protection against waves or water turbulence. (S-57 Annex A, Appendix A, Chapter 2 Attributes)4 = hard surfaced: Constructed with a surface of hard material, usually a term applied to roads surfaced with aphsalt or concrete. (S-57 Annex A, Appendix A, IHO Object Catalogue)5 = unsurfaced: Constructed with no extra protection, usually a term applied to roads not surfaced with a hard material. (S-57 Annex A, Appendix A, IHO Object Catalogue)6 = wooden: Constructed from wood. (S-57 Annex A, Appendix A, Chapter 2 Attributes)7 = metal: Constructed from metal. (S-57 Annex A, Appendix A, IHO Object Catalogue)8 = glass reinforced plastic (GRP): Constructed from a plastic material strengthened with fibres of glass. (S-57 Annex A, Appendix A, Chapter 2 Attributes)9 = painted: the application of paint to some other construction or natural feature.701 = Unknown:702 = Multiple:

Indicates the nationality of the specific object.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

LBO, RAL, MFF

IHO code for producing agencies or comma separated list.The nationality is encoded by a 2 character- code or comma separated list, following ISO 3166 (refer to Annex A to S-57 Appendix A);

Nature of Geological Layer _ Qualifying Terms. Physical characteristics of the geological layer in terms of size, morphology and consistency. (AML)

1 = fine: falls within the smallest size continuum for a particular nature of surface term. (M-4 425.6)2 = medium: falls within the moderate size continuum for a particular nature of surface term. (M-4 425.6)3 = coarse: falls within the largest size continuum for a particular nature of surface term. (M-4 425.6)4 = broken: fractured or in pieces. (adapted from Webster=s II New Riverside Dictionary, 1984)5 = sticky: having an adhesive or glue like property. (adapted from Webster=s II New Riverside Dictionary, 1984)6 = soft: not hard or firm. (adapted from Webster=s II New Riverside Dictionary, 1984)7 = stiff: not pliant; thick, resistant to flow. (adapted from Webster=s II New Riverside Dictionary, 1984)8 = volcanic: composed of or containing material ejected from a volcano. (adapted from Webster=s II New Riverside Dictionary, 1984)9 = calcareous: composed of or containing calcium or calcium carbonate. (IHO Dictionary, S-32, 5th Edition, 603)10 = hard: firm; usually refers to an area of the sea floor not covered by unconsolidated sediment. (IHO Dictionary, S-32, 5th Edition, 2194 and adapted from Webster=s II New Riverside Dictionary, 1984)701 = Unknown:702 = Multiple:

Surface Composition - Qualifying Terms. Physical characteristics of the natural surface composition in terms of their size, morphology and consistency.(Adapted from S-57 Annex A, Appendix A, Chapter 2 Attributes)

1 = fine: falls within the smallest size continuum for a particular nature of surface term. (M-4 425.6)2 = medium: falls within the moderate size continuum for a particular nature of surface term. (M-4 425.6)3 = coarse: falls within the largest size continuum for a particular nature of surface term. (M-4 425.6)4 = broken: fractured or in pieces. (adapted from Webster=s II New Riverside Dictionary, 1984)5 = sticky: having an adhesive or glue like property. (adapted from Webster=s II New Riverside Dictionary, 1984)6 = soft: not hard or firm. (adapted from Webster=s II New Riverside Dictionary, 1984)7 = stiff: not pliant; thick, resistant to flow. (adapted from Webster=s II New Riverside Dictionary, 1984)8 = volcanic: composed of or containing material ejected from a volcano. (adapted from Webster=s II New Riverside Dictionary, 1984)9 = calcareous: composed of or containing calcium or calcium carbonate. (IHO Dictionary, S-32, 5th Edition, 603)10 = hard: firm; usually refers to an area of the sea floor not covered by unconsolidated sediment. (IHO Dictionary, S-32, 5th Edition, 2194 and adapted from Webster=s II New Riverside Dictionary, 1984)701 = Unknown:702 = Multiple:

Type of rock or sediment making up the geological layer. (AML)

501 = Undifferentiated metamorphic rock: Rock formed by alteration of existing rocks by heat, pressure, or other processes in the earth's crust. (Chambers Concise Dictionary)502 = Undifferentiated igneous and volcanic rock: Rock formed by solidification of molten material or magma. (IHO Dictionary SP-32 5th Edition, 2391)503 = Granite: Light coloured, acidic igneous rock mineralogically composed primarily of quartz and potassium-sodium feldspars in which the mineral grains are visible to the naked eye (phaneritic texture) (IHO Dictionary SP-32 5th Edition, 2067)504 = Dolerite: A basic igneous rock occurring in minor intrusions such as sills and dykes. Usually dark coloured and fine or medium textured. (A Dictionary of Geography, 2nd Edition)505 = Basalt: Dark grey to black, dense to fine-grained, extrusive igneous rock. (Adapted from Webster's 3rd New International Dictionary) 506 = Gneiss: A coarse-grained crystalline rock of foliated texture and of streaked, wavy or banded appearance. Formed by the metamorphism of granite and other igneous rocks. (Adapted from A Dictionary of Geography, 2nd Edition)507 = Schist: A foliated metamorphic rock which can be split into thin flakes or flat lenticles. Schists are usually named from the dominant mineral, eg. mica schist. (IHO Dictionary SP-32 5th Edition, 4541)


Surface Composition. The general nature of the material of which the land surface or the sea bed is composed.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

1 = mud: soft, wet earth.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 2 = clay: (particles of less than 0.002mm); stiff, sticky earth that becomes hard when baked.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 3 = silt: (particles of 0.002-0.0625mm); when dried on hand will rub off easily.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 4 = sand: (particles of 0.0625-2.0mm); tiny grains of crushed or worn rock.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 5 = stone: a general term for rock fragments ranging in size from pebbles and gravel to boulders or a large rock mass. (IHO Dictionary, S-32, 5th Edition, 5059)6 = gravel: (particles of 2.0-4.0mm); small stones with coarse sand.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 7 = pebbles: (particles of 4.0-64.0mm); small stones made smooth and round by being rolled in water.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 8 = cobbles: (particles of 64.0-256.0mm); stones worn round and smooth by water and used for paving.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 9 = rock: any formation of natural origin that constitutes an integral part of the lithosphere. The natural occurring material that forms firm, hard, and solid masses. (adapted from IHO Dictionary, S-32, 5th Edition, 4415)11 = lava: the fluid or semi-fluid matter flowing from a volcano. The substance that results from the cooling of the molten rock. Part of the ocean bed is composed of lava. (IHO Dictionary, S-32, 5th Edition, 2680)

Mixed bottom: where the seabed comprises a mixture of material, the main constituent is given first eg. Fine sand with mud and shells would be indicated as 4,1,17

Description of any specific navigational requirements. (AML)


An indication of the navigational difficulties associated with the location. (AML)

501 = Easy502 = Normal 503 = Hard701 = Unknown:703 = Not Applicable:704 = Other:


The navigation system used by the vessel that found the object (AML)


Supporting Textual Information (in national language characters)

Supporting (free text) information in national language characters relevant to the object that cannot be explicitly encoded by any other attribute.




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Name (in national language characters) S NOBJNM 301 Text string S S-57 Attribute

NOMBO Density Density of non-mine mine-like bottom objects. (AML) I ESB nomden 20568 E

Not Found S SBO notfnd 20569 S

S NTXTDS 304 the string encodes the name of the external text file that contains the text in national language S S-57 Attribute

Number of Remaining Mines I ESB numrmn 20634 I

Name S OBJNAM 116 Text string S S-57 Attribute

Object Shape S SBO objshp 20722 Text string S

Object Reference Number Reference number given to the object. (AML) S SBO objtrn 20721 Text string S

On Sonar Indicates whether the object is visible on sonar. (AML) I SBO onsonr 20652 E

Operator Name of the company operating the installation. (AML) S LBO oprtor 20571 Text string S

Orientation of Best Observation R SBO orbobn 20572 degrees F

Cardinal Point Orientation I LBO orcard 20495 E

Origin of Data The method by which the data was determined. (AML) I SBO orgdat 20573 E

Originator S orgntr 20574 Text string S

Orientation R ORIENT 117 degrees F S-57 Attribute

Seasonal End Date The end of the active period for a seasonal object. (AML) S PEREND 118 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). A S-57 Attribute

Seasonal Start Date S PERSTA 119 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). A S-57 Attribute

Image File Link S PICREP 120 the string encodes the file name of an external graphic file. S S-57 Attribute Generic AML attribute

Pier Description Description of the pier. (AML) S ESB pierdn 20636 Text string S

Pier Contact Details Name and telephone number of the pier owner. (AML) S ESB pierod 20635 Text string S

Population The number of inhabitants(Chambers Concise Dictionary) I ESB popltn 20680 I

Porosity I ESB porsty 20575 Percentage I

Absolute Horizontal Accuracy R POSACC 401 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute Generic AML Attribute

Probability for Remaining Mines R ESB prbrmn 20638 Value between 0 and 1 F

Producing Country S PRCTRY 122 IHO code for producing agencies A S-57 Attribute Generic AML Attribute

Product (1 of 3) S PRODCT 123 L



Prairies Density The number of plants per square metre. (AML) I ESB prsden 20637 I

The principal name or identifier of an object in national language characters.(AML)

ESB, RAL, MFF, LBO, CLB

501 = 0: No data available (AML)502 = 1: Light - 1-4 NOMBOS/sq mile. (AML)503 = 2: Medium - 5-8 NOMBOS/sq mile. (AML)504 = 3: Heavy - 9-14 NOMBOS/sq mile. (AML)505 = 4: 15 NOMBOS/sq mile and more. (AML)


Occasions when the area has been surveyed and the object not found. (AML)

Encoded as repeating value pairs of name of vessel and date of survey. The survey date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD).


Text File Reference (in national language characters)

The file name (in national language characters) relating to an external text file.


Generic AML attributeThe attribute 'text file reference in national language' indicates that a file containing text extracted from relevant pilot books or other publications is available

The maximum acceptable number of remaining mines. (AML)

Unit: NoneResolution: 1


The principal name or identifier of an object in English. (AML)

ESB, RAL, MFF, LBO CLB

Geometric form, appearance or configuration of the feature. (Digital Geographic Information Working Group - DGIWG, Oct.87)



501 = yes: The contact is visible on sonar. (AML)502 = no: The contact is not visible on sonar. (AML)



The bearing from which the object can be best observed. (AML)


The angle of the major axis of the object expressed to the nearest 45 degrees using cardinal compass point notation. (Adapted from STANAG 3715)

501 = north/south: the object is orientated on average along a north-south axis. (AML)502 = east/west: the object is orientated on average along a east-west axis. (AML)503 = northeast/southwest: the object is orientated on average along a northeast-southwest axis. (AML)504 = northwest/southeast: the object is orientated on average along a northwest-southeast axis. (AML)701 = unknown: the object's orientation was not reported. (AML)703 = Not Applicable:


501 = Derived502 = Measured503 = Statistical504 = Raw505 = Foundation701 = Unknown:703 = Not Applicable:704 = Other:


Name of vessel or unit from which the information originated. (AML)

SBO, ESB


The angular distance measured from true north to the major axis of the object. (Digital Geographic Information Working Group – DGIWG, Oct.87)

ESB, SBO, LBO, RAL, MFF

ESB, RAL, MFF

The start of the active period for a seasonal object. (AML)

ESB, RAL, MFF

Indicates an external file containing a pictorial representation of the object (S-57 Annex A, Appendix A, IHO Object Catalogue)






The ratio of the aggregate volume of pore space in a rock or sediment to its total volume, expressed as a percentage. (AML)


The positional error estimate for a single point, relative to the specified spatial reference system (AML)


The probability that the maximum acceptable number of mines remain. (AML)


The country responsible for the production of the data (AML)


Indicates the substance(s) which are transported, stored or exploited by the object. (S-57 Annex A, Appendix A, Chapter 2 Attributes)

LBO, ESB, MFF

1 = oil: a thick, slippery liquid that will not dissolve in water, usually petroleum based in the context of storage tanks.(adapted from the Oxford Minidictionary, Third Edition) 2 = gas: a substance with particles that can move freely, usually a fuel substance in the context of storage tanks.(adapted from the Oxford Minidictionary, Third Edition) 3 = water: a colourless, odourless, tasteless liquid that is a compound of hydrogen and oxygen. (adapted from the Oxford Minidictionary, Third Edition)4 = stone: a general term for rock fragments. (IHO Dictionary, S-32, 5th Edition, 5059)5 = coal: a hard black mineral that is burned as fuel.(adapted from the Oxford Minidictionary, Third Edition) 6 = ore: a solid rock or mineral from which metal is obtained.(adapted from the Oxford Minidictionary, Third Edition) 7 = chemicals: any substance obtained by or used in a chemical process.(adapted from the Oxford Minidictionary, Third Edition)8 = drinking water: water that is suitable for human consumption. (adapted from the Oxford Minidictionary, Third Edition)9 = milk: a white fluid secreted by female mammals as food for their young. (adapted from the Oxford Minidictionary, Third Edition)10 = bauxite: a mineral from which aluminium is obtained.(adapted from the Oxford Minidictionary, Third Edition)11 = coke: a solid substance obtained after gas and tar have been extracted from coal, used as a fuel.(adapted from the Oxford Minidictionary, Third Edition)12 = iron ingots: an oblong lump of cast iron metal. (adapted from the Oxford Minidictionary, Third Edition)13 = salt: sodium chloride obtained from mines or by the evaporation of sea water. (adapted from the Oxford Minidictionary, Third Edition)


additional values

The attribute `product' encodes the various substances which are transported, stored or exploited.


LBO, ESB

501 = oil: crude and refined: crude; petroleum as it occurs naturally, as it comes from the well after extraneous substances (eg water) have been removed; oil that has not been refined. Refined; oil that has undergone one or more manufacturing process to make it suitable for a particular purpose. (Webster's 3rd New International Dictionary and AML)Specific examples include:diesel oil - heavy mineral oil used as fuel in diesel engines. (Webster's 3rd New International Dictionary)gasoil - oil comprised of various hydrocarbons used especially for making oil gas or carbureted water gas used for oils, feedstock and certain cracking processes. (Webster's 3rd New International Dictionary)industrial oil - oil in a range of specific gravity that facilitates its use in a variety of manufacturing and operating processes. (AML)light oil - an oil of low specific gravity or relatively low boiling point, mostly used as lubricants. (Webster's 3rd New International Dictionary)paraffin/kerosene: a liquid distilled from petroleum or shale oil used as a fuel or solvent; a complex mixture of hydrocarbons. (Adapted from Webster's 3rd New International Dictionary)petrol/gasoline - flammable liquid obtained from petroleum, used as fuel in internal-combustion engines. (AML)502 = solid fuel: material wherein the particles firmly cohere; is hard and compact; and is burnt as a source of heat or power. (Adapted from Chambers Concise Dictionary)Specific examples include:


additional values



LBO, ESB

515 = foodstuffs: liquid: any substance that a living thing feeds on, that nourishes the body; sustains or promotes growth, which is in a state where molecules move freely about one another but do not fly apart. Some foodstuffs may be consumed unprocessed, while others may undergo one or more manufacturing processes to make it palatable, or to allow mixing with other foodstuffs. (AML)specific examples include:alcohol - an intoxicating drink formed by fermenting or distilling hydrocarbons with various fruits or grains in water. (Adapted from Webster's 3rd New International Dictionary)edible oil (extracted from plant material) - any of various oils extracted from plants typically used in cooking. (Adapted from Chambers Concise Dictionary)milk - a white fluid secreted by female mammals as food for their young. (Adapted from the Oxford Minidictionary, Third Edition)water - Drinking: A clear colourless liquid, devoid of taste or smell, that is a compound of hydrogen and oxygen, which is intended for human consumption. (AML)516 = foodstuffs: preserved: any substance that a living thing feeds on, that nourishes the body; sustains or promotes growth which has been subjected to a process which prevents it from decaying. (AML)specific examples include:


additional values





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Reference to a Publication S PUBREF 124 The string encodes the reference to a specific paragraph from a nautical publication. S S-57 Attribute Generic AML attribute

Quality of Beach Data Indication of the quality of the beach survey. (AML) S ESB quabch 20576 A

Quality of Position An indication of the reliability of a quoted position. I QUAPOS 402 E S-57 Attribute

Qualification of Radar Coverage Qualification of Radar Coverage I RAL quarad 20690 E

Quality of Sounding Measurement S QUASOU 125 L S-57 Attribute

Route Classification I RAL rclass 20679 E

Capture Date S RECDAT 128 A S-57 Attribute Generic AML Attribute

Reflection Coefficient R ESB reflco 22490 F

Restriction(s) S RESTRN 131 L S-57 Attribute

Reverberation I ESB revebn 20579 E

Reverberation Frequency The frequency of the sonar signal. (AML) R ESB revfqy 20661 kHz F

Reverberation Grazing Angle The angle of the sonar signal. (AML) R ESB revgan 20662 degrees F

Width (right) R RAL rgtwid 20614 defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object or geo object class, e.g. nautical mile (NM) F

Strength According to Richter Scale Encodes the strength of seismic activity. (AML) I ESB ricsca 20593 Integer value in the range 1 to 9 I

Remaining Mines Likely, Maximum Number I ESB rmnlmn 20639 I

Runway length The total length (in feet) of the longest runway (AML) I RAL rwylen 20669 Feet I

Reference Year for Magnetic Variation The reference year for magnetic variation values. S MFF RYRMGV 130 The date should be encoded using 4 digits for the calendar year (CCYY). A S-57 AttributeSample Retained Sample of sediment retained. (AML) S ESB samret 20581 Text string S

Seabed Coverage Percentage of seabed covered by vegetation. (AML) I ESB sbdcov 20582 Percentage I

Current Scour Dimensions S scrdim 20517 A

Largest Scale of Survey Information I SCVAL1 134 the modulus of the scale is indicated, that is 1:25 000 is encoded as 25000 I S-57 Attribute

Smallest Scale of Survey Information I SCVAL2 135 the modulus of the scale is indicated, that is 1:250 000 is encoded as 250000 I S-57 Attribute

Minimum Distance between Survey Lines I SDISMN 146 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) I S-57 Attribute

Maximum Distance between Survey Lines I SDISMX 145 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) I S-57 Attribute

Sea Direction I ESB seadir 20713 E

Caveat S seccvt 20666 Text string S Generic AML Attribute

Reference to a specific location of any relevant information within an external publication. (AML)


1 = Full beach survey by especially trained team. (AML)2 = Organised beach reconnaissance. (AML)3 = Considerable information confirmed to a large extent by an experienced observer. (AML)4 = Considerable information but no expert confirmation. (AML)5 = Some information confirmed by an expert observer. (AML)6 = Some information but no expert confirmation. (AML)7 = Virtually no information other than charts, maps and publications. (AML)701 = Unknown:A = Good recent large scale air photographic cover. (AML)B = Good recent small scale air photographic cover available. (AML)C = Only poor or old air photographic cover available. (AML)D = No air photographic cover available. (AML)

This attribute is a coded string to be encoded in the format `number(year)letter, eg 2(1999)A.


To be encoded in the format `number(year)letter, eg 2(1999)A.


1 = surveyed: The position(s) were determined by the operation of making measurements for determining the relative position of points on, above or beneath the earth's surface. Survey implies a regular, controlled survey of any date. (adapted from IHO Dictionary, S-32, 5195, & IHO Chart Specifications, M-4, 175.2)2 = unsurveyed: Survey data does not exist or is very poor. (Adapted from IHO Dictionary, S-32, 5732)3 = inadequately surveyed: Position data is of a very poor quality. (Adapted from IHO Dictionary, S-32, 5732)5 = position doubtful: An object whose position has been reported but which is considered to be doubtful. (S-57 Annex A, Appendix A, IHO Object Catalogue)6 = unreliable: An object's position obtained from questionable or unreliable data. (S-57 Annex A, Appendix A, IHO Object Catalogue)7 = reported (not surveyed): An object whose position has been reported and its position confirmed by some means other than a formal survey such as an independent report of the same object. (S-57 Annex A, Appendix A, IHO Object Catalogue)8 = reported (not confirmed): An object whose position has been reported and its position has not been confirmed. (S-57 Annex A, Appendix A, IHO Object Catalogue)9 = estimated: The most probable position of an object determined from incomplete data or data of questionable accuracy. (Adapted from IHO Dictionary, S-32, 3960)10 = precisely known: A position that is of a known value, such as the position of an anchor berth or other defined object. (S-57 Annex A, Appendix A, IHO Object Catalogue)11 = calculated: A position that is computed from data. (S-57 Annex A, Appendix A, IHO Object Catalogue)

Generic AML attributeThe value `Approximate' when applied to the attribute `Quality of Position' is prohibited for use in AML. In circumstances where the term 'Position Approximate' would normally be applied to an object in a standard navigational charting sense, the value `Estimated' should be used.

501 = total: 100% coverage. 502 = partial: coverage is less than 100%, but greater than 0%. 503 = no coverage: 0% coverage, or blind spot. 701 = Unknown:703 = Not Applicable:


Indicates the reliability of the value of the sounding. (S-57 Annex A, Appendix A, IHO Object Catalogue)

CLB, ESB, LBO, MFF, SBO

1 = depth known: The depth from chart datum to the bottom is a known value. (S-57 Annex A, Appendix A, IHO Object Catalogue)2 = depth unknown: The depth from chart datum to the bottom is unknown. (S-57 Annex A, Appendix A, IHO Object Catalogue)3 = doubtful sounding: A depth that may be less than indicated. (Adapted from IHO Dictionary, S-32, 5th Edition, 4840)4 = unreliable sounding: A depth that is considered to be an unreliable value. (S-57 Annex A, Appendix A, IHO Object Catalogue)5 = no bottom found at value shown: Upon investigation the bottom was not found at this depth. (Adapted from IHO Dictionary, S-32, 5th Edition, 4848)6 = least depth known: The shoalest depth over an object is of known value. (Adapted from IHO Dictionary, S-32, 5th Edition, 27057 = least depth unknown, safe clearance at value shown: The least depth over an object is unknown, but there is considered to be safe clearance at this depth. (S-57 Annex A, Appendix A, IHO Object Catalogue)8 = value reported (not surveyed): Depth value obtained from a report, but not fully surveyed. (S-57 Annex A, Appendix A, IHO Object Catalogue)9 = value reported (not confirmed): Depth Value obtained from a report, which it has not been possible to confirm. (S-57 Annex A, Appendix A, IHO Object Catalogue)10 = maintained depth: the depth at which a channel is kept by human influence, usually by dredging. (IHO dictionary, S-32, 5th Edition, 3057)

A colour classification applied to a Q-Route to indicate the threat presented by the presence of mines (AML).

501 = Red: a channel where mines are known to be present (AML)502 = Yellow: a channel where the degree of danger has been reduced by MCM operations (AML)503 = Green: an established channel or route where all known mines have been countered or enemy mining is assessed not to have taken place (AML)701 = Unknown:703 = Not Applicable:704 = Other:


Gives the date when the object was captured, edited or deleted.(AML)


The capture date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD).according to ISO 8601:1988

The rate of reflection of acoustic energy from the sea surface or seabed. (AML)

Unit: NoneResolution: 0.1


Specific restrictions regarding entry and / or activities that may / may not be permitted.(AML)

MFF, RAL

1 = anchoring prohibited: an area within which anchoring is not permitted.2 = anchoring restricted: a specified area designated by appropriate authority, within which anchoring is restricted in accordance with certain specified conditions.3 = fishing prohibited: an area within which fishing is not permitted.4 = fishing restricted: a specified area designated by appropriate authority, within which fishing is restricted in accordance with certain specified conditions.5 = trawling prohibited: an area within which trawling is not permitted.6 = trawling restricted: a specified area designated by appropriate authority, within which trawling is restricted in accordance with certain specified conditions.7 = entry prohibited: an area within which navigation and/or anchoring is prohibited. (adapted from IHO Dictionary, S-32, 5th Edition, 4044)8 = entry restricted: a specified area designated by appropriate authority, within which navigation is restricted in accordance with certain specified conditions. (adapted from IHO Dictionary, S-32, 5th Edition, 4366)11 = diving prohibited: an area within which diving is not permitted.12 = diving restricted: a specified area designated by appropriate authority, within which diving is restricted in accordance with certain specified conditions.14 = area to be avoided: an IMO designated area to be avoided, defined as a routeing measure. (adapted from M-4, 435.7)701 = Unknown:702 = Multiple:

Level of back-scattering strength of sonar transmissions. (AML)

501 = A: Low - Signal to Reverberation Ratio (SRR) more than 15dB. (AML)502 = B: Medium - SRR Between 8 and 15dB. (AML)503 = C: High - SRR Less than 8dB. (AML)701 = Unknown:703 = Not Applicable:




The right-hand channel width of a Q-Route expressed as the measurement taken from the route centreline to the channel limit when proceeding UP a Q-route (e.g. A to B to C to D). (AML)



The maximum number of mines likely to be remaining following MCM operations. (AML)






The length, width, depth and orientation of the longest dimension of a scour that is associated with the object and that is caused by the action of currents. (AML)

SBO, LBO

Encodes in quadruplets: The length, width, depth and orientation of the longest dimension of the current scour. The "scour dimensions" data should be encoded using a floating point numeric value for the length of the feature (LLLL.L), a floating point numeric value for the width of the feature (WWW.W), a floating point numeric value for the depth of the feature (DDD.D) and an integer numeric value for the orientation of the feature from true north (OOO).


The figures describing each value shall be separated by a comma. Where no value is available for one or more elements, a null value should be used to preserve integrity of the quadruplet. Multiple current scours will be represented by repeated groups of these values

The largest scale for the range of survey scale as used in source diagram information.

CLB, ESB, SBO

The smallest scale for the range of survey scale as used in source diagram information.

CLB, ESB, SBO

The minimum spacing of the principal sounding lines of a survey.(AML)

CLB, ESB, SBO

The maximum spacing of the principal sounding lines of a survey. (AML)

CLB, ESB, SBO

Indicates from which direction waves will cause most stress to a moored boat, (AML)

501 = N502 = NE503 = E504 = SE505 = S506 = SW507 = W508 = NW701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


A component of a security classification used for authorising a specific group to have access rights (AML)




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International Defence Organisation (IDO) status I secido 20663 E Generic AML Attribute

Owner Authority S secown 20665 Owner Authority is encoded by a two-character code derived from NATO STANAG 1059 S Generic AML Attribute

Protective Marking I secpmk 20664 E

Sector Limit One R ESB SECTR1 136 degrees F S-57 Attribute

Sector Limit Two R ESB SECTR2 137 degrees F S-57 Attribute

Sensor Coverage Description of sensor coverage. (AML) S ESB sencov 20643 Text string S

First Sensor I senfir 20531 E

Last Sensor I senlst 20541 E

Self Protection (Air) I ESB sfptna 20640 E

Self Protection (Surface) I ESB sfptns 20642 E

Ships Speed Speed of ship when image was obtained. (AML) R SBO shpspd 20583 Knots F

Signal Frequency The frequency of the signal I RAL SIGFRQ 139 Hz I S-57 AttributeSignal Group S ESB SIGGRP 141 A S-57 Attribute

Signal Period R ESB SIGPER 142 seconds F S-57 Attribute

Signal Sequence S ESB SIGSEQ 143 A S-57 Attribute

Simple Initial Threat R ESB sminth 20644 Value between 0 and 1 F

Sound Velocity Speed of sound. (AML) R ESB sndvel 20588 metres per second F

Sonar Reflectivity I snrflc 20586 E

Sonar Frequency Frequency of the sonar that obtained the image. (AML) I SBO snrfrq 20584 E

Sonar Range Scale The specified range of the sonar. (AML) R SBO snrrsc 20585 metres F

Sonar Signal Strength I sonsig 20587 E

Source Date S SORDAT 147 A S-57 Attribute Generic AML Attribute

First Source I LBO sorfir 20532 E

The International Defence Organisation (IDO) status (if applicable) that must precede, and be applied to, the Protective Marking thus making it an IDO Marking.(AML)


501 = NATO: North Atlantic Treaty Organisation 502 = NACC: North Atlantic Co-operation Council 503 = PfP: Partnership for Peace 504 = WEU: Western European Union 701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


Denotes the `owner' that is responsible for establishing and setting the protective marking level. (AML)



A marking indicating the minimum standards of protection required of the data.(AML)


501 = Cosmic Top Secret:502 = Focal Top Secret:503 = Top Secret:504 = Secret:505 = Confidential:506 = Restricted:507 = Unclassified701 = Unknown:703 = Not Applicable:


Generic AML Attribute.Refer to National security procedure manuals for definitions relating to protective markings and application.

A sector is the part of a circle between two straight lines drawn from the centre to the circumference. Sector limit 1 specifies the first limit of the sector. The order of sector limit 1 and sector limit 2 is clockwise around the central object.(S-57 Annex A, Appendix A, IHO Object Catalogue)

A sector is the part of a circle between two straight lines drawn from the centre to the circumference. Sector 2 specifies the second limit of the sector.(S-57 Annex A, Appendix A, IHO Object Catalogue)


Indicates by the use of which sensor the object was originally reported. (Adapted from STANAG 3715)

SBO, LBO

501 = acoustic sensor: the object was reported as a result of a sound signal being returned from the object. (AML)502 = magnetic sensor: the object was reported as a result of detecting a fluctuation in the local magnetic field. (AML)503 = video sensor: the object was reported as a result of a sighting through electronic visual equipment. (AML)504 = diver sighting: the object was reported as a result of a visual sighting made by a diver.(AML)604 = other: the object was reported as a result of another method. (AML)506 = physical snag: the object was reported as a result of the object fouling lines, anchors or fishing nets. (AML)507 = observed sinking: the object was reported as a result of a first hand observation of the object sinking. (AML)508 = Reported Sinking: the object was reported as a result of a report made by a third party or from published information. (AML)509 = None reported: the method by which the object was found was not reported. (AML)703 = Not Applicable:


Indicates by the use of which sensor the object was subsequently confirmed. (Adapted from STANAG 3715)

SBO, LBO

501 = acoustic sensor: the object was reported as a result of a sound signal being returned from the SBO. (AML)502 = magnetic sensor: the object was reported as a result of detecting a fluctuation in the local magnetic field. (AML)503 = video sensor: the object was reported as a result of a sighting through electronic visual equipment. (AML)504 = diver sighting: the object was reported as a result of a visual sighting made by a diver.(AML)604 = other: the object was reported as a result of another method. (AML)506 = physical snag: the object was reported as a result of the object fouling lines, anchors or fishing nets. (AML)507 = observed sinking: the object was reported as a result of a first hand observation of the object sinking. (AML)508 = Reported Sinking: the object was reported as a result of a report made by a third party or from published information. (AML)509 = None reported: the method by which the object was found was not reported. (AML)703 = Not Applicable:704 = Other:


An indication of the level of self protection from air attack. (AML)

501 = Bad502 = Normal503 = Good701 = Unknown:703 = Not Applicable:704 = Other:


An indication of the level of self protection from surface attack. (AML)




The number of signals, the combination of signals or the morse character(s) within one period of full sequence. (S-57 Annex A, Appendix A, IHO Object Catalogue)

The signal group of a light is encoded using brackets to separate the individual groups. A group of signals may be a single number, a chain of numbers separated by "+", a sequence of up to 4 letters or a letter and a number. A fixed light has no signal group. Where no specific signal group is given for one of the light characteristics, this should be shown by an empty pair of brackets.

The time occupied by an entire cycle of intervals of light and eclipse. (S-57 Annex A, Appendix A, IHO Object Catalogue)The sequence of times occupied by intervals of light and eclipse for all `light characteristics' except for occulting where the sequence of times is occupied by intervals of eclipse and light.(S-57 Annex A, Appendix A, IHO Object Catalogue)

Units: secondsformat: (EE.E)+LL.L

The threat posed to the first ship to transit a minefield, given that there have been no previous MCM and that only poised mines have been used in the calculations. (AML)



Measure of sonar reflectivity returned by the object. (AML) ESB, SBO

501 = H: A high level of reflectivity is returned by the object. (AML)502 = M: A medium level of reflectivity is returned by the object. (AML)503 = L: A low level of reflectivity is returned by the object. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


501 = VLF: Very low frequency502 = LF: Low frequency503 = HF: High frequency504 = VHF: Very high frequency701 = Unknown:703 = Not Applicable:704 = Other:



An indication of the strength of the echo of a sonic signal returned from an object. (Adapted from IHO Dictionary, S-32, 4819)

ESB, LBO

501 = nil: the object returns no sonar signal. (AML)502 = poor: the object returns a poor sonar signal. (AML)503 = moderate: the object returns a moderate sonar signal. (AML)504 = strong: the object returns a strong sonar signal. (AML)701 = Unknown:703 = Not Applicable:704 = Other:


The date of issue of the source information, if applicable. (AML)


The source date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.

Indicates the source of the original report of the object. (Adapted from STANAG 3715)

501 = naval vessel: the object was reported by a vessel operated by a recognised National Naval Authority. (AML)502 = survey vessel: the object was reported by a vessel engaged in the business of determining and recording data relating to bodies of water and the nature of the sea bed. (Adapted from IHO Dictionary, S-32, 5th Edition, 5206.)503 = merchant ship: the object was reported by a vessel operated by a merchant marine organisation, engaged in the transport of goods for payment. (AML)504 = fishing vessel: the object was reported by a vessel engaged in harvesting fish or other products from the sea for commercial gain. (Partly adapted from Webster's 3rd New International Dictionary)505 = research vessel: the object was reported by a vessel engaged in the business of conducting research into the sea and its environs. (AML)506 = yacht: the object was reported by a yacht, being a privately owned sailing or power boat used for pleasure. (Partly adapted from Webster's 3rd New International Dictionary)507 = diver: the object was reported as a result of a visual sighting made by a diver. (AML)508 = national HO/authority charts: the object was sourced from information given on a chart published by a recognised Hydrographic Office or national authority. (AML)509 = national HO/authority notice to mariners: the object was sourced from information given in a Notice to Mariners published by a recognised Hydrographic Office or national authority. (AML)



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Source Agency S SORIND 148 IHO code for producing agencies A S-57 Attribute

Source Country S SORIND 148 IHO code for producing agencies A S-57 Attribute

Source ID Any ID of the source (e.g. chart number). (AML) S SORIND 148 Text String A S-57 Attribute

Source Type The type of the source (e.g. chart or report). (AML) S SORIND 148 Text String A S-57 Attribute

Last Source I LBO sorlst 20542 E

Sounding Accuracy R SOUACC 144 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Sounding Datum I soudat 20589 E

Sounding Velocity I CLB souvel 20616 E

Species S RAL spcies 20667 Text string S

Self Protection (Near Defence) I ESB sptnnd 20641 E

Surf Height Average height of the surf. (AML) R ESB srfhgt 20596 defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object or geo object class, e.g. metres (m) F

Surf Zone Distance of surf zone from water line. (AML) I ESB srfzne 20597 defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object or geo object class, e.g. metres (m) I

Status of Small Bottom Object Current minehunting status of the object. (AML) S SBO staobj 20718 L

Status S STATUS 149 L

Suitability for ACV Use Suitability for use by Air Cushioned Vehicles. (AML) I ESB stbacv 20595 E

Steepest Face Orientation R ESB stfotn 20592 degrees F

Survey Authority The authority which was responsible for the survey.(AML) S SURATH 150 Text string S S-57 Attribute

Survey Date and Time S SBO surdat 20598 A

Survey Date End The end date of the survey. (AML) S SUREND 151 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). A S-57 Attribute

Survey Date Start The start date of the survey. (AML) S SURSTA 152 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). A S-57 Attribute

Surface Threat Indication of the level of threat from surface attack. (AML) I ESB surtht 20681 E

The agency responsible for the production of the source (AML)


Generic AML AttributeThe following attributes are concatenated to map as comma separated values of the single attribute SORIND:Source CountrySource AgencySource IDSource Type

The country responsible for the production of the source (AML)







Indicates the source which subsequently confirmed the object. (Adapted from STANAG 3715)

501 = naval vessel: the object was reported by a vessel operated by a recognised National Naval Authority. (AML)502 = survey vessel: the object was reported by a vessel engaged in the business of determining and recording data relating to bodies of water and the nature of the sea bed. (Adapted from IHO Dictionary, S-32, 5th Edition, 5206.)503 = merchant ship: the object was reported by a vessel operated by a merchant marine organisation, engaged in the transport of goods for payment. (AML)504 = fishing vessel: the object was reported by a vessel engaged in harvesting fish or other products from the sea for commercial gain. (Partly adapted from Webster's 3rd New International Dictionary)505 = research vessel: the object was reported by a vessel engaged in the business of conducting research into the sea and its environs. (AML)506 = yacht: the object was reported by a yacht, being a privately owned sailing or power boat used for pleasure. (Partly adapted from Webster's 3rd New International Dictionary)507 = diver: the object was reported as a result of a visual sighting made by a diver. (AML)508 = national HO/authority charts: the object was sourced from information given on a chart published by a recognised Hydrographic Office or national authority. (AML)509 = national HO/authority notice to mariners: the object was sourced from information given in a Notice to Mariners published by a recognised Hydrographic Office or national authority. (AML)


The best estimate of the accuracy of the sounding data. The error is assumed to be positive and negative. (S-57 Annex A, Appendix A, Chapter 2 Attributes)

CLB, LBO, MFF, RAL

The maximum of the one-dimensional error. The error is assumed to be positive and negative. The plus/minus character shall not be encoded

Indicates the datum to which soundings are referred. (Adapted from S-57 Annex A, Appendix A, IHO Object Catalogue)


501 = Mean Low Water Springs: (MLWS) - the average height of the low waters of spring tides. Also called spring low water. (IHO Dictionary, S-32, 5th Edition, 3150)502 = Mean lower low water springs: (MLLWS) - the average height of lower low water springs at a place. (IHO Dictionary, S-32, 5th Edition, 3146)503 = Mean Sea Level: (MSL) - the average height of the surface of the sea at a tide station for all stages of the tide over a 19-year period, usually determined from hourly height readings measured from a fixed predetermined reference level. (IHO Dictionary, S-32, 5th Edition, 3156)504 = Lowest Low Water: an arbitrary level conforming to the lowest tide observed at a place, or some what lower.(S-57 Annex A, Appendix A, IHO Object Catalogue)505 = Mean Low Water: (MLW) - the average height of all low waters at a place over a 19-year period. (IHO Dictionary, S-32, 5th Edition, 3147)506 = Lowest Low water Springs: an arbitrary level conforming to the lowest water level observed at a place at spring tides during a period of time shorter than 19 years. (Hydrographic Service, Royal Australian Navy)507 = Approximate mean low water springs: an arbitrary level, usually within + 0.3m from that of mean low water springs (MLWS). (Hydrographic Service, Royal Australian Navy)508 = Indian Spring Low Water: (ISLW) - an arbitrary tidal datum approximating the level of the mean of the lower low water at spring tides. Also called Indian Tidal Plane. (IHO Dictionary, S-32, 5th Edition, 2427). A tidal datum approximating the lowest water level observed at a place, originated by G.H. Darwin for the tides of India at a level below MSL being equal to the sum of amplitudes of the harmonic constituents M2, S2, K1 and O1; usually below that of the lower low water at spring tides. Also called Indian tide plane. (Hydrographic Service, Royal Australian Navy).509 = Low water springs: an arbitrary level, approximating that of mean low water springs (MLWS). (Hydrographic Service, Royal Australian Navy)510 = Approximate lowest astronomical tide: an arbitrary level, usually within + 0.3m from that of lowest astronomical tide (LAT). (Hydrographic Service, Royal Australian Navy)


This attribute is used to specify the datum to which soundings (sounding datum, see S-57 Part 3) are referred. When the vertical datum is unknown, such as water areas above locks, the value `local datum' is to be used, and further details may be encoded using `INFORM'. The + 0.3m approximation quoted in the approximate" levels is somehow arbitrary and follows the British example of their definition for approximate LAT".

Indicates type of correction that has been added to, or subtracted from instrument reading to obtain correct depth. (AML)

502 = Echo sounder calibrated at 4800ft/sec. Uncorrected. 503 = Echo sounder calibrated at 1500m/sec Uncorrected. 504 = Matthews tables (NP 139 Edn 2) Corrected. 505 = Sound Velocity Meter (SVM) Corrected. 506 = Carters Tables (NP 139 Edn3) Corrected507 = Corrected by other means of calibration.701 = Unknown: 702 = Multiple:703 = Not Applicable:704 = Other. (AML)


A group of individuals having common characteristics, specialised from others of the same genus (Chambers Concise Dictionary)


An indication of the level of self protection from land attack. (AML)





501 = Detected (MILEC): Minelike echoes have been selected from within the sonar clutter. (AML)502 = Classified (MILCO): The object has been classified as a minelike object. (AML)503 = Classified (NON-MILCO): The object has been classified as a non-minelike object. (AML)504 = Identified (NOMBO): The object has been positively identified as a non mine minelike bottom object. (AML)505 = Identified (Mine): The object has been positively identified as a mine. (AML)506 = Identified (UXO): The object has been positively identified as an Unexploded Ordnance. (AML)507 = Countermined: The mine has been exploded by an explosive charge placed close to the mine. (AML)508 = Neutralised: The mine has been rendered incapable of firing though may still remain dangerous to handle. (AML)509 = Removed: The mine has been taken out of an area where its detonation would be unacceptable. (AML)510 = Swept: The object has been removed or destroyed by minesweepers using explosive or mechanical gear. (AML)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


Indicates the condition of the object in terms of permanency or usage. (S-57 Annex A, Appendix A, Chapter 2 Attributes)

LBO, RAL, ESB, MFF

1 = permanent: intended to last or function indefinitely. (The Concise Oxford Dictionary, 7th Edition) 2 = occasional: acting on special occasions; happening irregularly. (The Concise Oxford Dictionary, 7th Edition)3 = recommended: presented as worthy of confidence, acceptance, use, etc. (The Macquarie Dictionary, 1988)4 = not in use: no longer used for the purpose intended; disused.(S-57 Annex A, Appendix A, Chapter 2 Attributes) 5 = periodic/intermittent: recurring at intervals. (The Concise Oxford Dictionary, 7th Edition)6 = reserved: set apart for some specific use. (adapted from The Concise Oxford Dictionary, 7th Edition)7 = temporary: meant to last only for a time. (The Concise Oxford Dictionary)8 = private: not in public ownership or operation.9 = mandatory: compulsory; enforced. (The Concise Oxford Dictionary, 7th Edition)10 = destroyed/ruined: 11 = extinguished: no longer illuminated.(S-57 Annex A, Appendix A, IHO Object Catalogue)12 = illuminated: lit by floodlights, strip lights, etc.13 = historic: famous in history; of historical interest. (The Concise Oxford Dictionary, 7th Edition)14 = public: belonging to, available to, used or shared by, the community as a whole and not restricted to private use. (adapted from The New Shorter Oxford English Dictionary, 1993)15 = synchronised: occur at a time, coincide in point of time, be contemporary or simultaneous. (The New Shorter Oxford English Dictionary, 1993)


additional values

501 = Yes: There are no obstructions with height greater than 1.7m and gradient is acceptable. (AML)502 = No: Not suitable for ACV use. (AML)


The angular distance measured from true north to the axis of the steepest face of the object. (Adapted from Digital Geographic Information Working Group - DGIWG, Oct.87)


CLB, ESB, SBO

Date of minehunting survey and time that the object was found. (AML)

The date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD). The time should be encoded using four digits for the time in hours and minutes (nnnn). CCYYMMDDhhmm.


The time zone that the time refers to should be encoded by use of the INFORM attribute.

CLB, ESB, SBOCLB, ESB, SBO

501 = Low: 502 = Medium: 503 = High:



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Survey Type The method used in acquiring survey data (AML) S SURTYP 153 L S-57 Attribute

Swell Height Average height of the swell. (AML) R ESB swlhgt 20600 defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object or geo object class, e.g. metres (m) F

Swept date S RAL swpdat 20668 A

Tide - accuracy of water level I MFF T_ACWL 161 E S-57 Attribute

Tide - high and low water levels S MFF T_HWLW 162 A S-57 Attribute

Tide - method of tidal prediction Tide - method of tidal prediction I MFF T_MTOD 163 E S-57 Attribute

Tide - time and height differences S MFF T_THDF 164 A S-57 Attribute

Tide, current- time interval I MFF T_TINT 165 I S-57 Attribute

Tide - time series values Indicates the values of a time series. S MFF T_TSVL 166 A S-57 Attribute

Tide - value of harmonic constituents S MFF T_VAHC 167 A table defined by comma separated values which define the following: number of columns, number of rows, column headings, row headings, cell values. A S-57 Attribute

Target Strength The strength of the returning signal from the target. (AML) I SBO tarstg 20689 dB I

Tidal Range R ESB tdlrng 20601 defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object or geo object class, e.g. metres (m) F

Tidal Type I ESB tdltyp 20646 E

Technique of sounding measurement S TECSOU 156 L S-57 Attribute

Target Reference Weight I ESB tgrfwt 20645 E

Time End Indicates the end of an active period. S MFF TIMEND 168 A S-57 Attribute

Time of Year Time of year an activity is taking place. (AML) S ESB timeyr 20602 L

Time Start Indicates the start of an active period. S MFF TIMSTA 169 A S-57 Attribute

Tonnage The operational tonnage of the vessel. (AML) I LBO tonage 20603 tonnes I

Traffic density Indicates the density of traffic (AML) S RAL traden 20714 Text string S

Traffic flow I TRAFIC 172 E S-57 Attribute

Tidal Stream - Panel Values S MFF TS_TSP 159 A S-57 Attribute

Tidal Stream , current - time series values Values for a direction and velocity time series. S MFF TS_TSV 160 A S-57 Attribute

Towed Body Depth Depth of towed body that obtained the image. (AML) R SBO twdbdp 20604 metres F

textual description S txtdes 20720 text string S added at v2.0

Text File Reference The file name relating to an external text file. S TXTDSC 158 the string encodes the name of the external text file that contains the text in English S S-57 Attribute

CLB, ESB, SBO

1 = reconnaissance/sketch survey: a survey made to a lower degree of accuracy and detail than the chosen scale would normally indicate. (IHO Dictionary, S-32, 5th Edition, 5219)2 = controlled survey: a thorough survey usually conducted with reference to guidelines4 = examination survey: a survey principally aimed at the investigation of underwater obstructions and dangers5 = passage survey: a survey where soundings are acquired by vessels on passage6 = remotely sensed: a survey where features have been positioned and delimited using remote sensing techniques701 = Unknown:703 = Not Applicable:704 = Other:


The latest known date when a defined area was last swept for mines. (AML)

The swept date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD) according to ISO 8601: 1988.


related only to swept area which was removed at v2.0

The accuracy of the water level, comparative to the accuracy of standard port predictions.

1 = better than 0.1 m and 10 minutes: 2 = worse than 0.1m and 10 minutes:

Information on the times and heights of high and low waters for each day of the duration of the time series.

CCYYMMDDThhmm,xxx.xDates / times and heights should be encoded in pairs, each value separated by a comma.The date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) and 2 digits for the day (DD), separated by a capital T from the hour (hh) and minutes (mm).Height value: 0 - 99.9Height units: metresResolution: 0.1

1 = simplified harmonic method of prediction: prediction of tidal heights by combining a simplified set of harmonic constituents into a single time/height curve.2 = full harmonic method of tidal prediction: prediction of tidal heights by combining a complete set of harmonic constituents into a single time/height curve.3 = time and height difference non-harmonic method: prediction of high and low water times and heights by modification of the high and low water times and heights of a known time/height curve.701 = Unknown:703 = Not Applicable:704 = Other:

The time and tidal height or tidal stream rate difference comparative to a reference station.

REFSTA,hhmm,x.x,v.v,REFSTA: reference station (text string)hhmm: time difference ( )x.x: height difference ((-) metres)v.v: rate difference (-) knots)

Indicates the interval between the values in any time series i.e. tidal, current or other data.

mm.m,mm.m,mm.m etcmm.m time interval (minutes)

x.x,x.x,x.x,x.x etcx.x height (metres)

Harmonic constituents are the harmonic elements in a mathematical expression for the tide producing force and in the corresponding formula for the tidal curve. Each constituent represents a periodic change or variation in the relative positions of the earth, moon and sun.


The average difference in height between high and low tides.(Adapted from IHO Dictionary, S-32, 5th Edition, 4225)


The characteristic feature of tide determined from the combination of its diurnal and semi-diurnal components. (IHO Dictionary, S-32, 5th Edition, 5716)

501 = Diurnal: A tide in which the tidal cycle consists of one high water and one low water each tidal day. (IHO Dictionary, S-32, 5th Edition, 5434)502 = Mixed: The type of tide in which a diurnal wave produces large inequalities in heights and/or durations of successive high and/or low waters. This term applies to the tides intermediate to those predominantly semidiurnal and those predominantly diurnal. (IHO Dictionary, S-32, 5th Edition, 5450)503 = Mixed Diurnal: Diurnal tides which become semidiurnal with a considerable decrease in range when the moon's declination is small. (IHO Dictionary, S-32, 5th Edition, 5451)504 = Mixed Semi-Diurnal: Semidiurnal tides with noticeable inequality in corresponding extremes. (IHO Dictionary, S-32, 5th Edition, 5452)505 = Quarter Diurnal: The tide resulting from the distortion of the normal tide in shallow water with four high waters and four low waters during one day. (IHO Dictionary, S-32, 5th Edition, 5459)506 = Semidiurnal: A tide in which the tidal cycle consists of two high waters and two low waters each tidal day, with comparatively little diurnal inequality. (IHO Dictionary, S-32, 5th Edition, 5462)507 = Shallow Water: A tide with distortional effects resulting from shallow water. (Adapted from IHO Dictionary, S-32, 5th Edition, 5463)


Indicates the method or equipment used to obtain the object's depth. (S-57 Annex A, Appendix A, IHO Object Catalogue)

CLB, ESB, LBO, MFF, SBO

1 = found by echo-sounder/precision depth recorder: the depth was determined by using an instrument that determines depth of water by measuring the time interval between emission of a sonic or ultrasonic signal and return of its echo from the bottom. (adapted from IHO Dictionary, S-32, 1547)2 = found by side scan sonar: the depth was computed from a record produced by active sonar in which fixed acoustic beams are directed into the water perpendicularly to the direction of travel to scan the bottom and generate a record of the bottom configuration. (adapted from IHO Dictionary, S-32, 4710)3 = found by multi-beam/sonarray: the depth was determined by using a wide swath echo sounder that uses multiple beams to measure depths directly below and transverse to the ship's track. (adapted from IHO Dictionary, S-32, 3339)4 = found by diver: the depth was determined by a person skilled in the practice of diving. (adapted from IHO Dictionary, S-32, 1422)5 = found by lead-line: the depth was determined by using a line, graduated with attached marks and fastened to a sounding lead. (adapted from IHO Dictionary, S-32, 2698)6 = swept by wire-drag: the given area was determined to be free from navigational dangers to a certain depth by towing a buoyed wire at the desired depth by two launches, or a least depth was identified using the same technique. (adapted from IHO Dictionary, S-32, 5248, 6013)

Reference weight of the target used when referring to burial probability. (AML)

501 = 500: Target weight is 500kg. (AML)502 = 1000: Target weight is 1000kg. (AML)


CCYYMMDDThhmmssThe date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) and 2 digits for the day (DD), separated by a capital T from the hour (hh), minutes (mm), and seconds(ss).

501 = All year round: The activity takes place at any time during the year. (AML)502 = January: 503 = February: 504 = March: 505 = April: 506 = May: 507 = June: 508 = July: 509 = August: 510 = September: 511 = October: 512 = November: 513 = December: 701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


CCYYMMDDThhmmssThe date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) and 2 digits for the day (DD), separated by a capital T from the hour (hh), minutes (mm), and seconds(ss).



Created as free text due to MEIC data being incompatible with linear features (i.e. MEDS data expresses Density as No of units per month for a one degree square)

An indication of the general traffic flow in relation to, or associated with, the feature.(AML)

MFF, RAL

1 = inbound: traffic flow in a general direction toward a port or similar destination.2 = outbound: traffic flow in a general direction away from a port or similar point of origin.3 = one-way: traffic flow in one general direction only.4 = two-way: traffic flow in two generally opposite directions.701 = Unknown:703 = Not Applicable:704 = Other:

Identifies the reference station with reference water level and the direction of the flow and the springs rate from 6 hours before to 6 hours after high water (HW) or low water (LW) at the reference station at hourly intervals.

REFSTA,WL,ddd,v.v,ddd,v.v etcREFSTA: reference station (text string)WL: reference water level and encoded in comma separated pairsddd: flow direction (degrees)v.v: velocity (knots)

ddd,v.vddd,v.v etcEncoded as comma separated values.ddd: direction (degrees)v.v: velocity (knots)


The actual words used to define a particular thing, for the capture of information related to the feature "user defined" (adapted from SOED)




Generic AML attributeThe attribute 'text file reference' indicates that a file containing text extracted from relevant pilot books or other publications is available


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Type of Wreck S LBO typewk 20607 E

Type of Resource Location Type of Resource Location I ESB typres 20647 E

Type of shipping Indicates the predominant type of shipping (AML) S RAL typshp 20715 L

Type of Tonnage I LBO typton 20606 E

Undetectable Mines Ratio with Burial R ESB umnrwb 20649 Value between 0 and 1 F

Undetectable Mines Ratio without Burial R ESB umrwob 20650 Value between 0 and 1 F

Undetectable Mines Ratio The total fraction of undetectable mines. (AML) R ESB undmnr 20648 Value between 0 and 1 F

Underwater Reference Mark I unwrfm 20608 E

Heading-Up Bearing R RAL upbear 20682 degrees F

Value of annual change in magnetic variation The annual change in magnetic variation values. R MFF VALACM 173 F S-57 Attribute

Depth Contour Value R CLB VALDCO 174 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Value of local magnetic anomaly R MFF VALLMA 175 F S-57 Attribute

Value of magnetic variation The magnetic variation value. R MFF VALMAG 176 F S-57 Attribute

Value of Nominal Range R VALNMR 178 nautical miles F S-57 Attribute

Depth of Water over Feature R VALSOU 179 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F

Relative Vertical Accuracy R VERACC 180 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Vertical Clearance, Closed R ESB VERCCL 182 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Vertical Clearance R ESB VERCLR 181 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Vertical Clearance, Open R ESB VERCOP 183 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Vertical Clearance, Safe R ESB VERCSA 184 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F S-57 Attribute

Vertical Datum I VERDAT 185 E

Vertical Length R VERLEN 186 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. feet (ft) F S-57 Attribute

Vertical Datum Shift Parameter R ESB vershf 22488 F

Beam of Vessel R LBO vesbem 20486 defined in the HUNI subfield of the DSPM record, the HUNITS attribute of the M_UNIT meta object, or object class, e.g. metres (m) F

Draught of Vessel R LBO vesdgh 20527 The vessel draught should be encoded using a floating point numeric value up to 3 digits. F

An indication of the type and / or usage of the vessel before it became a wreck. (AML)

501 = steam ship: a vessel driven by water in the form of gas or vapour. (Adapted from Chambers Concise Dictionary)502 = motor vessel: a craft or structure for transport by water, driven by an engine. (Adapted from Chambers Concise Dictionary)503 = twin motor vessel: a craft or structure for transport by water, driven by two engines. (Adapted from Chambers Concise Dictionary)504 = diesel electric vessel: a vessel driven by the electric current produced by a diesel-engined generator. (Adapted from Concise Oxford Dictionary 9th Edition)505 = turbo electric vessel: a vessel using a form of electric drive in which turbine-driven generators supply electric power to motors coupled to the propeller. (Adapted from Chambers Concise Dictionary)506 = gas turbine vessel: a vessel driven by a rotary motor in which a wheel or drum with curved vanes is driven by expanding hot air admitted to it and allowed to escape. (Adapted from Chambers Concise Dictionary)507 = merchant vessel: vessel operated by a merchant marine organisation, engaged in the transport of goods for payment. (AML)508 = fishing vessel: a vessel engaged in harvesting fish or other products from the sea for commercial gain. (Partly adapted from Webster's 3rd New International Dictionary)509 = military vessel: a vessel used by a countries armed forces, sometimes engaged in the pursuit of warfare. (AML)510 = coaster: a ship that travels along the coast from port to port. (Concise Oxford Dictionary 9th Edition)511 = inshore vessel: a vessel that operates close to the shore. (Adapted from Concise Oxford Dictionary 9th Edition)


501 = Drinking Water: Location where drinking water is available. (AML)502 = Engineer Resources: Location where building materials are available. (AML)503 = Storage: Location suitable for bulk storage, eg. a fuel dump. (AML)701 = Unknown:702 = Multiple:703 = Not Applicable:704 = Other:


501 = fishing vessels: Gross weight (tons) >1,000 Length (meters) >18502 = merchants: Gross weight (tons) >1,000 Length (meters) >18503 = tankers: Gross weight (tons) 1,000 Dead weight (tons) 175,000 Length (meters) 18 to 300504 = large tankers: Dead weight (tons) 175,000 to 350,000 Length (meters) 300 to 325505 = super tankers: Dead weight (tons) >350,000 Length (meters) >325701 = Unknown:703 = Not Applicable:704 = Other:


Values created in line with MEDS Environmental Briefing Dockets (EBDs)

The method used to derive the operational tonnage of the vessel. (AML)

501 = builders' measurement: figure supplied by the builders of the vessel. (AML)502 = displacement: figure derived from the volume or weight of water displaced by a ship of equal weight. (Webster's 3rd New International Dictionary).503 = gross: tonnage of the vessel including cargo. (AML)504 = net: tonnage of the vessel excluding cargo. (AML)703 = not applicable: the tonnage of the vessel is unknown, therefore the method of measurement cannot be given. (AML)701 = Unknown:704 = Other:


The fraction of undetectable mines due to total mine burial. (AML)


The fraction of undetectable mines and masked mines caused by the bottom profile and the clutter density. (AML)



Indication that the object can be used as a reference mark to confirm the vessel's position.(AML)

SBO, LBO

501 = yes: The object is suitable as an underwater reference mark. (AML)502 = no: The object is not suitable as an underwater reference mark. (AML)


The horizontal direction heading up a Q-Route (e.g. A to B to C to D), expressed as the angular distance from true north. It is usually measured from 0 at the reference direction clockwise through 360 (modified IHO Dictionary, S-32, 5th Edition, 435)


sxx.xs: negative sign for west (-)Value: 0.1 - 99.9Units: minute (i)Resolution: 0.1

A specified value assigned to a particular depth contour. (AML)

Drying Contours are indicated by a negative value

The value of the deviation from the normal magnetic variation.

xx.xValue: 0.1 - 99.9Units: minute (i)Resolution: 0.1

sxx.xxs: negative sign for west (-)Value: 0.1 - 99.99Units: degree (_)Resolution: 0.01

The nominal range at which an object can be seen or a signal detected.(S-57 Annex A, Appendix A, IHO Object Catalogue)

ESB, MFF

The nominal range is normally the luminous range of a light in a homogeneous atmosphere in which the meteorological visibility is 10 sea miles. (IHO Hydrographic Dictionary, S-32, 5th Edition, 4218)

Average depth of water over the feature relative to the specified vertical datum. (AML)

SBO, ESB, LBO, MFF


The vertical error estimate for the distance between two points, or the accuracy of one point with respect to another


Generic AML attributeThe one dimensional error. The error is assumed to be positive and negative. The plus/minus character shall not be encoded.

The vertical clearance of an object in closed condition (e.g. a closed lifting bridge) measured from the plane towards the object overhead.(S-57 Annex A, Appendix A, IHO Object Catalogue)

The vertical clearance measured from the plane towards the object overhead.(S-57 Annex A, Appendix A, IHO Object Catalogue)

In the case of cables carrying high voltages an additional clearance of from 2 to 5 metres may be needed to avoid an electrical discharge. When known, the authorised safe clearance (known in the UK as the Safe Overhead Clearance) which is the physical clearance minus a safety margin shall be stated. (IHO Chart Specifications, M-4)

The vertical clearance of an object in opened condition (e.g. an opened lifting bridge) measured from the plane towards the object overhead.(S-57 Annex A, Appendix A, IHO Object Catalogue)

The safe vertical clearance measured from the plane towards the object overhead.(S-57 Annex A, Appendix A, IHO Object Catalogue)

In the case of cables carrying high voltages the quoted vertical clearance may have to be reduced by 2 to 5 metres to avoid an electrical discharge. When known, the authorised safe clearance (known in the UK as the Safe Overhead Clearance) which is the physical clearance minus a safety margin shall be stated. (IHO Chart Specifications, M-4)

Indicates the datum to which both heights and soundings are referred. (S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, LBO, MFF, RAL

1 = Mean Low Water Springs: (MLWS) - the average height of the low waters of spring tides. Also called spring low water. (IHO Dictionary, S-32, 5th Edition, 3150)2 = Mean lower low water springs: (MLLWS) - the average height of lower low water springs at a place. (IHO Dictionary, S-32, 5th Edition, 3146)3 = Mean Sea Level: (MSL) - the average height of the surface of the sea at a tide station for all stages of the tide over a 19-year period, usually determined from hourly height readings measured from a fixed predetermined reference level. (IHO Dictionary, S-32, 5th Edition, 3156)4 = Lowest Low Water: an arbitrary level conforming to the lowest tide observed at a place, or some what lower.(S-57 Annex A, Appendix A, Chapter 2 Attributes)5 = Mean Low Water: (MLW) - the average height of all low waters at a place over a 19-year period. (IHO Dictionary, S-32, 5th Edition, 3147)6 = Lowest Low water Springs: an arbitrary level conforming to the lowest water level observed at a place at spring tides during a period of time shorter than 19 years. (Hydrographic Service, Royal Australian Navy)7 = Approximate mean low water springs: an arbitrary level, usually within + 0.3m from that of mean low water springs (MLWS). (Hydrographic Service, Royal Australian Navy)8 = Indian Spring Low Water: (ISLW) - an arbitrary tidal datum approximating the level of the mean of the lower low water at spring tides. Also called Indian Tidal Plane. (IHO Dictionary, S-32, 5th Edition, 2427). A tidal datum approximating the lowest water level observed at a place, originated by G.H. Darwin for the tides of India at a level below MSL being equal to the sum of amplitudes of the harmonic constituents M2, S2, K1 and O1; usually below that of the lower low water at spring tides. Also called Indian tide plane. (Hydrographic Service, Royal Australian Navy).9 = Low water springs: an arbitrary level, approximating that of mean low water springs (MLWS). (Hydrographic Service, Royal Australian Navy)10 = Approximate lowest astronomical tide: an arbitrary level, usually within + 0.3m from that of lowest astronomical tide (LAT). (Hydrographic Service, Royal Australian Navy)11 = Nearly lowest low water: an arbitrary level approximating the lowest water level observed at a place, usually equivalent to the Indian spring low water (ISLW). (Hydrographic


additional values

This attribute is used to specify the datum to which heights (vertical datum, see S-57 Part 3) are referred.When the vertical datum is unknown, the value `local datum' is to be used, and further details may be encoded using `INFORM'.The + 0.3m approximation quoted in the approximate" levels is somehow arbitrary and follows the British example of their definition for approximate LAT".

The effective vertical length of an object, measured from the highest (lowest) point of the object to either the seabed or ground (if fixed), or the water level (if floating). (S-57 Annex A, Appendix A, IHO Object Catalogue)

ESB, SBO, MFF, LBO

Shift parameter required to encode the difference between vertical datums. (AML)

Units: metresResolution: 0.1

new meta attribute

The beam of the vessel, being the widest part of its hull, in its operational state. (Adapted from Webster's 3rd New International Dictionary)


The draught of the vessel, being the depth of water the ship draws especially when loaded, in its operational state. (Adapted from Webster's 3rd New International Dictionary)



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Length of Vessel R LBO veslen 20548 The vessel length should be encoded using a floating point numeric value up to 4 digits. F

Water Clarity R ESB watclr 20610 metres F

Water Level Effect I WATLEV 187 E S-57 Attribute

Wavelength R ESB wavlen 20611 metres F

Weight Bearing Capability Maximum weight of vehicle that can use the object. (AML) I ESB wbrcap 20612 kilograms I

Weapon Coverage Description of weapon coverage. (AML) S ESB wpncov 20651 Text string S

Zone Colour Gives an indication of estimated level of risk. (AML). I ESB znecol 20660 E

The length of the vessel, being its total extent from end to end, in its operational state. (Adapted from Webster's 3rd New International Dictionary)


Indication of the particulate matter suspended in the water column. (AML)


Indicates the effect of the surrounding water on an object.(S-57 Annex A, Appendix A, Chapter 2 Attributes)

ESB, LBO, MFF

1 = partly submerged at high water: Partially covered and partially dry at high water. (S-57 Annex A, Appendix A, Chapter 2 Attributes) Note:not allowable for objects Impact Scour; Sensor Anomaly; Underwater/awash Rock.2 = always dry: Not covered at high water under average meteorological conditions. (S-57 Annex A, Appendix A, Chapter 2 Attributes)3 = always under water/submerged: remains covered by water at all times under average meteorological conditions. (S-57 Annex A, Appendix A, Chapter 2 Attributes)4 = covers and uncovers: Expression intended to indicate an area of a reef or other projection from the bottom of a body of water which periodically extends above and is submerged below the surface. Also referred to as dries or uncovers. (IHO Dictionary, S-32, 5th Edition, 1111)5 = awash: Flush with, or washed by the waves at low water under average meteorological conditions. (Adapted from IHO Dictionary, S-32, 5th Edition, 308)6 = subject to inundation and flooding: An area periodically covered by flood water excluding tidal waters. (Digital Geographic Information Standard - DIGEST 1.2)701 = Unknown:703 = Not Applicable:704 = Other:

The distance between corresponding points of two successive periodic waves in the direction of propagation, for which the oscillation has the same phase.(IHO Dictionary, S-32, 5th Edition,5939)




501 = Red: High level of risk 502 = Amber: Medium level of risk503 = Green: Low level of risk701 = Unknown:703 = Not Applicable:



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