pt. 157 33 cfr ch. i (7–1–98 edition) · 157.10csegregated ballast tanks, crude oil washing...

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33 CFR Ch. I (7–1–98 Edition)Pt. 157

hailer, ship’s whistle, or any other ap-propriate means.

(h) Only a lightering tender, a supplyboat, or a crew boat, equipped with aspark arrestor on its exhaust, or a tankvessel providing bunkers, may mooralongside a vessel engaged inlightering operations.

(i) Lightering operations shall not beconducted within 1 nautical mile of off-shore structures or mobile offshoredrilling units.

(j) No vessel engaged in lightering ac-tivities may anchor over charted pipe-lines, artificial reefs, or historical re-sources.

(k) All vessels engaged in lighteringactivities shall be able to immediatelymaneuver at all times while inside adesignated lightering zone. The mainpropulsion system must not be disabledat any time.

(l) In preparing to moor alongside thevessel to be lightered, a service vesselshall not approach the vessel to belightered closer than 1000 meters unlessthe service vessel is positioned broadon the quarter of the vessel to belightered. The service vessel must tran-sition to a nearly parallel headingprior to closing to within 50 meters ofthe vessel to be lightered.

PART 157—RULES FOR THE PROTEC-TION OF THE MARINE ENVIRON-MENT RELATING TO TANK VES-SELS CARRYING OIL IN BULK

Subpart A—General

Sec.157.01 Applicability.157.02 Incorportion by reference.157.03 Definitions.157.04 Authorization of classification soci-

eties.157.05 Performing calculations for this part.157.06 Appeals.157.07 Equivalents.

Subpart B—Design, Equipment, andInstallation

157.08 Applicability of Subpart B.157.09 Segregated ballast.157.10 Segregated ballast tanks and crude

oil washing systems for certain new ves-sels.

157.10a Segregated ballast tanks, crude oilwashing systems, and dedicated cleanballast tanks for certain new and exist-ing vessels of 40,000 DWT or more.

157.10b Segregated ballast tanks, dedicatedclean ballast tanks, and special ballastarrangements for tank vessels transport-ing Outer Continental Shelf oil.

157.10c Segregated ballast tanks, crude oilwashing systems, and dedicated cleanballast tanks for certain new and exist-ing tankships of 20,000 to 40,000 DWT.

157.10d Double hulls on tank vessels.157.11 Pumping, piping, and discharge ar-

rangements.157.12 Cargo monitor and control system.157.13 Designated observation area.157.15 Slop tanks in tank vessels.157.17 Oily residue tank.157.19 Cargo tank arrangement and size.157.21 Subdivision and stability.157.23 Cargo and ballast system informa-

tion.157.24 Submission of calculations, plans,

and specifications.157.24a Submission of calculations, plans,

and specifications for existing vessels in-stalling segregated ballast tanks.

Subpart C—Vessel Operation

157.25 Applicability of subpart C.157.26 Operation of a tank vessel in viola-

tion of regulations.157.27 Discharges: Tank vessels carrying oil

exclusively on rivers, lakes, bays,sounds, and the Great Lakes, and sea-going tank vessels of less than 150 grosstons.

157.28 Discharges from tank barges exempt-ed from certain design requirements.

157.29 Discharges: Seagoing tank vessels of150 gross tons or more.

157.31 Discharges: Chemical additives.157.33 Water ballast in oil fuel tanks.157.35 Ballast added to cargo tanks.157.37 Discharge of cargo residue.157.39 Machinery space bilges.157.41 Emergencies.157.43 Discharges of clean and segregated

ballast: Seagoing tank vessels of 150gross tons or more.

157.45 Valves in cargo or ballast piping sys-tem.

157.47 Information for master.157.49 Instruction manual.

Subpart D—Crude Oil Washing (COW)System on Tank Vessels

GENERAL

157.100 Plans for U.S. tank vessels: Submis-sion.

157.102 Plans for foreign tank vessels: Sub-mission.

157.104 Scale models.157.106 Letter of acceptance.157.108 Crude Oil Washing Operations and

Equipment Manual for U.S. tank vessels:Submission.

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Coast Guard, DOT Pt. 157

157.110 Crude Oil Washing Operations andEquipment Manual for foreign tank ves-sels: Submission.

157.112 Approved Crude Oil Washing Oper-ations and Equipment Manual.

157.114 Crude Oil Washing Operations andEquipment Manual: Not approved.

157.116 Required documents: U.S. tank ves-sels.

157.118 Required documents: Foreign tankvessels.

157.120 Waiver of required documents.

DESIGN, EQUIPMENT, AND INSTALLATION

157.122 Piping, valves, and fittings.157.124 COW tank washing machines.157.126 Pumps.157.128 Stripping system.157.130 Crude oil washing with more than

one grade of crude oil.157.132 Cargo tanks: Hydrocarbon vapor

emissions.157.134 Cargo tank drainage.157.136 Two-way voice communications.157.138 Crude Oil Washing Operations and

Equipment Manual.

INSPECTIONS

157.140 Tank vessel inspections.157.142 Letter of acceptance: Inspections.157.144 Tank vessels of the same class: In-

spections.157.146 Similar tank design: Inspections on

U.S. tank vessels.157.147 Similar tank design: Inspections on

foreign tank vessels.157.148 COW system: Evidence for inspec-

tions.157.150 Crude Oil Washing Operations and

Equipment Manual: Recording informa-tion after inspections.

PERSONNEL

157.152 Person in charge of COW operations.157.154 Assistant personnel.

COW OPERATIONS

157.155 COW operations: General.157.156 COW operations: Meeting manual re-

quirements.157.158 COW operations: Changed character-

istics.157.160 Tanks: Ballasting and crude oil

washing.157.162 Crude oil washing during a voyage.157.164 Use of inert gas system.157.166 Hydrocarbon emissions.157.168 Crew member: Main deck watch.157.170 COW equipment: Removal.157.172 Limitations on grades of crude oil

carried.

Subpart E—Dedicated Clean Ballast Tankson Tank Vessels

GENERAL

157.200 Plans for U.S. tank vessels: Submis-sion.

157.202 Plans and documents for foreigntank vessels: Submission.

157.204 Letter of acceptance.157.206 Dedicated Clean Ballast Tanks Oper-

ations Manual for U.S. tank vessels: Sub-mission.

157.208 Dedicated Clean Ballast Tanks Oper-ations Manual for foreign tank vessels:Submission.

157.210 Approved Dedicated Clean BallastTanks Operations Manual.

157.212 Dedicated Clean Ballast Tanks Oper-ations Manual: Not approved.

157.214 Required documents: U.S. tank ves-sels.

157.216 Required documents: Foreign tankvessels.

157.218 Dedicated clean ballast tanks: Alter-ations.

DESIGN AND EQUIPMENT

157.220 Dedicated clean ballast tanks:Standards.

157.222 Pump and piping arrangements.157.224 Dedicated Clean Ballast Tanks Oper-

ations Manual.

DEDICATED CLEAN BALLAST TANKSOPERATIONS

157.225 Dedicated clean ballast tanks oper-ations: General.

157.226 Dedicated Clean Ballast Tanks Oper-ations Manual: Procedures to be fol-lowed.

157.228 Isolating valves: Closed during avoyage.

Subpart F—Exemption From § 157.10a or§ 157.10c

157.300 Qualifications for exemptions underthis part.

157.302 Applying for an exemption or re-questing modification of an exemption.

157.304 Shore-based reception facility:standards.

157.306 Granting, denying, or modifying anexemption.

157.308 Revocation of exemption: procedureand appeals.

157.310 Exempted vessels: operations.

Subpart G—Interim Measures for CertainTank Vessels Without Double Hulls Car-rying Petroleum Oils

157.400 Purpose and applicability.157.410 Emergency lightering requirements

for oil tankers.


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33 CFR Ch. I (7–1–98 Edition)§ 157.01

157.415 Bridge resource management policyand procedures.

157.420 Vessel specific watch policy and pro-cedures.

157.430 Enhanced survey requirements.157.435 Vital systems surveys.157.440 Autopilot alarm or indicator.157.445 Maneuvering performance capabil-

ity.157.450 Maneuvering and vessel status infor-

mation.157.455 Minimum under–keel clearance.157.460 Additional operational requirements

for tank barges.

Subpart H—Interim Measures for CertainTank Vessels Without Double Hulls Car-rying Animal Fat or Vegetable Oil

157.500 Purpose and applicability.157.510 Operational measures.

Subpart I—Interim Measures for CertainTank Vessels Without Double Hulls Car-rying Other Non–Petroleum Oil

157.600 Purpose and applicability.157.610 Operational measures.

APPENDICES TO PART 157

APPENDIX A—DAMAGE ASSUMPTIONS, HYPO-THETICAL OUTFLOWS, AND CARGO TANKSIZE AND ARRANGEMENTS

APPENDIX B—SUBDIVISION AND STABILITY AS-SUMPTIONS

APPENDIX C—PROCEDURE FOR DETERMININGDISTRIBUTION OF SEGREGATED BALLASTTANKS TO PROVIDE PROTECTION AGAINSTOIL OUTFLOW IN THE EVENT OF GROUND-ING, RAMMING, OR COLLISION

APPENDIX D—EXAMPLE OF A PROCEDURE FORDEDICATED CLEAN BALLAST TANKS OPER-ATIONS

APPENDIX E—SPECIFICATIONS FOR THE DE-SIGN, INSTALLATION AND OPERATION OF APART FLOW SYSTEM FOR CONTROL OFOVERBOARD DISCHARGES

APPENDIX F—GUIDELINES AND SPECIFICATIONSFOR OIL DISCHARGE MONITORING AND CON-TROL SYSTEMS FOR TANKERS

APPENDIX G—TIMETABLES FOR APPLICATIONOF DOUBLE HULL REQUIREMENTS

AUTHORITY: 33 U.S.C. 1903; 46 U.S.C. 3703,3703a (note); 49 CFR 1.46. Subparts G, H, andI are also issued under section 4115(b), Pub.L. 101–380, 104 Stat. 520; Pub. L. 104–55, 109Stat. 546.

SOURCE: CGD 74–32, 40 FR 48283, Oct. 14,1975, unless otherwise noted.

Subpart A—General

§ 157.01 Applicability.(a) Unless otherwise indicated, this

part applies to each vessel that carriesoil in bulk as cargo and that is:

(1) Documented under the laws of theUnited States (a U.S. vessel); or

(2) Any other vessel that enters oroperates in the navigable waters of theUnited States, or that operates, con-ducts ligtering under 46 U.S.C. 3715, orreceives cargo from or transfers cargoto a deepwater port under 33 U.S.C. 1501et seq., in the United States ExclusiveEconomic Zone, as defined in 33 U.S.C.2701(8).

(b) This part does not apply to a ves-sel exempted under 46 U.S.C. 2109 or 46U.S.C. 3702.

[CGD 90–051, 57 FR 36238, Aug. 12, 1992, asamended by CGD 91–045, 61 FR 39788, July 30,1996]

§ 157.02 Incorportion by reference.(a) Certain material is incorporated

by reference into this part with the ap-proval of the Director of the FederalRegister under 5 U.S.C. 552(a) and 1CFR part 51. To enforce any editionother than that specified in paragraph(b) of this section, the Coast Guardmust publish notice of change in theFEDERAL REGISTER; and the materialmust be available to the public. All ap-proved material is available for inspec-tion at the Office of the Federal Reg-ister, 800 North Capitol Street NW.,suite 700, Washington, DC, and at theU.S. Coast Guard, Office of Operatingand Environmental Standards (G–MSO), 2100 Second Street SW., Wash-ington, DC 20593–0001, and is availablefrom the sources indicated in para-graph (b) of this section.

(b) The material approved for incor-poration by reference in this part andthe sections affected are as follows:

International Maritime Organization (IMO)—4 Albert Embankment, London SE1 7SR,England.

IMO Assembly Resolution A.601(15), Provision and Display of Manoeuvring In-formation on Board Ships, Annex sections 1.1, 2.3, 3.1, and 3.2 with appendices,adopted on 19 November 1987 .............................................................................. 157.450


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Coast Guard, DOT § 157.03

IMO Assembly Resolution A.744(18), Guidelines on the Enhanced Programme ofInspections During Surveys of Bulk Carriers and Oil Tankers, Annex B sec-tions 1.1.3–1.1.4, 1.2–1.3, 2.1, 2.3–2.6, 3–8, and Annexes 1–10 with appendices,adopted 4 November 1993 ..................................................................................... 157.430

IMO Assembly Resolution A.751(18), Interim Standards for ShipManoeuvrability, Annex sections 1.2, 2.3–2.4, 3–4.2, and 5, adopted 4 November1993 with Explanatory Notes in MSC/Circ. 644 dated 6 June 1994 ........................ 157.445

Oil Companies International Marine Forum (OCIMF)—15th Floor, 96 Victoria Street,London, SW1E 5JW, England.

International Safety Guide for Oil Tankers and Terminals, Fourth Edition,Chapters 6, 7, and 10, 1996 .................................................................................... 157.435

[CGD 91–045, 61 FR 39788, July 30, 1996; 61 FR41685, Aug. 9, 1996]

§ 157.03 Definitions.Except as otherwise stated in a sub-

part:Amidships means the middle of the

length.Animal fat means a non-petroleum

oil, fat, or grease derived from animalsand not specifically identified else-where in this part.

Ballast voyage means the voyage thata tank vessel engages in after it leavesthe port of final cargo discharge.

Breadth or B means the maximummolded breadth of a vessel in meters.

Cargo tank length means the lengthfrom the forward bulkhead of theforwardmost cargo tanks, to the afterbulkhead of the aftermost cargo tanks.

Center tank means any tank inboardof a longitudinal bulkhead.

Clean ballast means ballast which:(1) If discharged from a vessel that is

stationary into clean, calm water on aclear day, would not—

(i) Produce visible traces of oil on thesurface of the water or on adjoiningshore lines; or

(ii) Cause a sludge or emulsion to bedeposited beneath the surface of thewater or upon adjoining shore lines; or

(2) If verified by an approved cargomonitor and control system, has an oilcontent that does not exceed 15 p.m.

Combination carrier means a vessel de-signed to carry oil or solid cargoes inbulk.

Crude oil means any liquid hydro-carbon mixture occurring naturally inthe earth, whether or not treated torender it suitable for transportation,and includes crude oil from which cer-tain distillate fractions may have beenremoved, and crude oil to which cer-tain distillate fractions may have beenadded.

Deadweight or DWT means the dif-ference in metric tons between thelightweight displacement and the totaldisplacement of a vessel measured inwater of specific gravity 1.025 at theload waterline corresponding to the as-signed summer freeboard.

Dedicated clean ballast tank means acargo tank that is allocated solely forthe carriage of clean ballast.

Domestic trade means trade betweenports or places within the UnitedStates, its territories and possessions,either directly or via a foreign port in-cluding trade on the navigable rivers,lakes, and inland waters.

Double bottom means watertight pro-tective spaces that do not carry any oiland which separate the bottom oftanks that hold any oil within thecargo tank length from the outer skinof the vessel.

Double hull means watertight protec-tive spaces that do not carry any oiland which separate the sides, bottom,forward end, and aft end of tanks thathold any oil within the cargo tanklength from the outer skin of the vesselas prescribed in § 157.10d.

Doubles sides means watertight pro-tective spaces that do not carry any oiland which separate the sides of tanksthat hold any oil within the cargo tanklength from the outer skin of the ves-sel.

Existing vessel means any vessel thatis not a new vessel.

Fleeting or assist towing vessel meansany commercial vessel engaged in tow-ing astern, alongside, or pushing ahead,used solely within a limited geographicarea, such as a particular barge fleet-ing area or commercial facility, andused solely for restricted service, suchas making up or breaking up largertows.


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33 CFR Ch. I (7–1–98 Edition)§ 157.03

Foreign trade means any trade that isnot domestic trade.

From the nearest land means from thebaseline from which the territorial seaof the United States is established inaccordance with international law.

Inland vessel means a vessel that isnot oceangoing and that does not oper-ate on the Great Lakes.

Instantaneous rate of discharge of oilcontent means the rate of discharge ofoil in liters per hour at any instant, di-vided by the speed of the vessel inknots at the same instant.

Integrated tug barge means a tug anda tank barge with a mechanical systemthat allows the connection of the pro-pulsion unit (the tug) to the stern ofthe cargo carrying unit (the tankbarge) so that the two vessels functionas a single self-propelled vessel.

Large primary structural member in-cludes any of the following:

(1) Web frames.(2) Girders.(3) Webs.(4) Main brackets.(5) Transverses.(6) Stringers.(7) Struts in transverse web frames

when there are 3 or more struts and thedepth of each is more than 1⁄15 of thetotal depth of the tank.

Length or L means the distance inmeters from the fore side of the stemto the axis of the rudder stock on a wa-terline at 85 percent of the least mold-ed depth measured from the moldedbaseline, or 96 percent of the totallength on that waterline, whichever isgreater. In vessels designed with drag,the waterline is measured parallel tothe designed waterline.

Lightweight means the displacementof a vessel in metric tons withoutcargo, oil fuel, lubricating oil, ballastwater, fresh water, and feedwater intanks, consumable stores, and any per-sons and their effects.

Major conversion means a conversionof an existing vessel that:

(1) Substantially alters the dimen-sions or carrying capacity of the ves-sel, except a conversion that includesonly the installation of segregated bal-last tanks, dedicated clean ballasttanks, a crude oil washing system, dou-ble sides, a double bottom, or a doublehull;

(2) Changes the type of vessel;(3) Substantially prolongs the ves-

sel’s service life; or(4) Otherwise so changes the vessel

that it is essentially a new vessel, asdetermined by the Commandant (G–MOC).

MARPOL Protocol means the Protocolof 1978 Relating to the InternationalConvention for the Prevention of Pol-lution from Ships, 1973, done at Londonon February 17, 1978. This Protocol in-corporates and modifies the Inter-national Convention for the Preventionof Pollution from Ships, 1973, done atLondon on November 2, 1973.

New vessel means:(1) A U.S. vessel in domestic trade

that:(i) Is constructed under a contract

awarded after December 31, 1974;(ii) In the absence of a building con-

tract, has the keel laid or is at a simi-lar stage of construction after June 30,1975;

(iii) Is delivered after December 31,1977; or

(iv) Has undergone a major conver-sion for which:

(A) The contract is awarded after De-cember 31, 1974;

(B) In the absence of a contract, con-version is begun after June 30, 1975; or

(C) Conversion is completed after De-cember 31, 1977; and

(2) A foreign vessel or a U.S. vessel inforeign trade that:

(i) Is constructed under a contractawarded after December 31, 1975;

(ii) In the absence of a building con-tract, has the keel laid or is at a simi-lar stage of construction after June 30,1976;

(iii) Is delivered after December 31,1979; or

(iv) Has undergone a major conver-sion for which:

(A) The contract is awarded after De-cember 31, 1975;

(B) In the absence of a contract, con-version is begun after June 30, 1976; or

(C) Conversion is completed after De-cember 31, 1979.

Non-petroleum oil means oil of anykind that is not petroleum-based. It in-cludes, but is not limited to, animal fatand vegetable oil.

Oceangoing has the same meaning asdefined in § 151.05 of this chapter.


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Officer in charge of a navigationalwatch means any officer employed orengaged to be responsible for navigat-ing or maneuvering the vessel and formaintaining a continuous vigilantwatch during his or her periods of dutyand following guidance set out by themaster, international or national regu-lations, and company policies.

Oil means oil of any kind or in anyform including, but not limited to, pe-troleum, fuel oil, sludge, oil refuse, andoil mixed with wastes other thandredged spoil. This includes liquid hy-drocarbons as well as animal and vege-table oils.

Oil fuel means any oil used as fuel formachinery in the vessel in which it iscarried.

Oil spill response vessel means a vesselthat is exclusively dedicated to oper-ations to prevent or mitigate environ-mental damage due to an actual or im-pending accidental oil spill. This in-cludes a vessel that performs routineservice as an escort for a tank vessel,but excludes a vessel that engages inany other commercial activity, such asthe carriage of any type of cargo.

Oil tanker means a vessel that is con-structed or adapted primarily to carrycrude oil or products in bulk as cargo.This includes a tank barge, a tankship,and a combination carrier, as well as avessel that is constructed or adaptedprimarily to carry noxious liquid sub-stances in bulk as cargo and which alsocarries crude oil or products in bulk ascargo.

Oily mixture means a mixture withany oil content.

Other non-petroleum oil means an oilof any kind that is not petroleum oil,an animal fat, or a vegetable oil.

Permeability of a space means theratio of the volume within a space thatis assumed to be occupied by water tothe total volume of that space.

Petroleum oil means petroleum in anyform including crude oil, fuel oil, min-eral oil, sludge, oil refuse, and refinedproducts.

Primary towing vessel means any ves-sel engaged in towing astern, along-side, or pushing ahead and includes thetug in an integrated tug barge. It doesnot include fleeting or assist towingvessels.

Product means any liquid hydro-carbon mixture in any form, exceptcrude oil, petrochemicals, and liquefiedgases.

Segregated ballast means the ballastwater introduced into a tank that iscompletely separated from the cargooil and oil fuel system and that is per-manently allocated to the carriage ofballast.

Slop tank means a tank specificallydesignated for the collection of cargodrainings, washings, and other oil mix-tures.

Tank means an enclosed space that isformed by the permanent structure of avessel, and designed for the carriage ofliquid in bulk.

Tank barge means a tank vessel notequipped with a means of self-propul-sion.

Tank vessel means a vessel that isconstructed or adapted primarily tocarry, or that carries, oil or hazardousmaterial in bulk as cargo or cargo resi-due, and that—

(1) Is a vessel of the United States;(2) Operates on the navigable waters

of the United States; or(3) Transfers oil or hazardous mate-

rial in a port or place subject to the ju-risdiction of the United States. Thisdoes not include an offshore supply ves-sel, or a fishing vessel or fish tendervessel of not more than 750 gross tonswhen engaged only in the fishing indus-try.

Tankship means a tank vessel pro-pelled by mechanical power or sail.

Vegetable oil means a non-petroleumoil or fat not specifically identifiedelsewhere in this part that is derivedfrom plant seeds, nuts, kernels, orfruits.

Wing tank means a tank that is lo-cated adjacent to the side shell plating.

[CGD 96–026, 61 FR 33666, June 28, 1996; 61 FR36786, July 12, 1996, as amended by CGD 91–045, 61 FR 39788, July 30, 1996]

§ 157.04 Authorization of classificationsocieties.

(a) The Coast Guard may authorizeany classification society (CS) to per-form certain plan reviews, certifi-cations, and inspections required bythis part on vessels classed by that CS,except that only U.S. classification so-cieties may be authorized to perform


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33 CFR Ch. I (7–1–98 Edition)§ 157.05

those plan reviews, inspections, andcertifications for U.S. vessels.

(b) If a CS desires authorization toperform the plan reviews, certifi-cations, and inspections required underthis part, it must submit to the Com-mandant (G–MOC), U.S. Coast Guard,Washington, DC 20593–0001, evidencefrom the governments concerned show-ing that they have authorized the CSto inspect and certify vessels on theirbehalf under the MARPOL Protocol.

(c) The Coast Guard notifies the CSin writing whether or not it is acceptedas an authorized CS. If authorization isrefused, reasons for the refusal are in-cluded.

(d) Acceptance as an authorized CSterminates unless the following aremet:

(1) The authorized CS must have eachCoast Guard regulation that is applica-ble to foreign vessels on the navigablewaters of the United States.

(2) Each issue concerning equivalentsto the regulations in this part must bereferred to the Coast Guard for deter-mination.

(3) Copies of any plans, calculations,records of inspections, or other docu-ments relating to any plan review, in-spection, or certification performed tomeet this part must be made availableto the Coast Guard.

(4) Each document certified under§§ 157.116(a)(2), 157.118(b)(1)(ii), and157.216(b)(1)(ii) must be marked withthe name or seal of the authorized CS.

(5) A copy of the final documentationthat is issued to each vessel that is cer-tified under this part must be referredto the Commandant (G–MOC), U.S.Coast Guard, Washington, D.C. 20593–0001.

(Reporting and recordkeeping requirementsapproved by the Office of Management andBudget under control number 2115–0520)

[CGD 82–28, 50 FR 11625, and 11630, Mar. 22,1985, as amended by CGD 88–052, 53 FR 25122,July 1, 1988; CGD 96–026, 61 FR 33668, June 28,1996]

§ 157.05 Performing calculations forthis part.

In this part, unless the context re-quires otherwise:

(a) Formulas are in the InternationalSystem of Units (SI);

(b) Values used in those formulasmust be in the International System ofUnits; and

(c) Forward and after perpendicularsare located at the forward end and atthe after end of the length. The for-ward perpendicular coincides with theforeside of the stem on the waterlineon which the length of the vessel ismeasured.

§ 157.06 Appeals.

(a) Any person directly affected by anaction taken under this part may re-quest reconsideration by the CoastGuard official who is responsible forthat action.

(b) Any person not satisfied with aruling made under the procedure con-tained in paragraph (a) of this sectionmay appeal that ruling in writing, ex-cept as allowed under paragraph (e) ofthis section, to the Coast Guard Dis-trict Commander of the district inwhich the action was taken. The appealmay contain supporting documentationand evidence that the appellant wishesto have considered. If requested, theDistrict Commander may stay the ef-fect of the action being appealed whilethe ruling is being reviewed. The Dis-trict Commander issues a ruling afterreviewing the appeal submitted underthis paragraph.

(c) Any person not satisfied with aruling made under the procedure con-tained in paragraph (b) of this sectionmay appeal that ruling in writing, ex-cept as allowed under paragraph (e) ofthis section, to the Assistant Com-mandant for Marine Safety and Envi-ronmental Protection, U.S. CoastGuard, Washington, DC 20593–0001. Theappeal may contain supporting docu-mentation and evidence that the appel-lant wishes to have considered. If re-quested, the Assistant Commandant forMarine Safety and Environmental Pro-tection may stay the effect of the ac-tion being appealed while the ruling isbeing reviewed. The Chief, MarineSafety and Environmental Protectionissues a ruling after reviewing the ap-peal submitted under this paragraph.

(d) Any decision made by the Assist-ant Commandant for Marine Safetyand Environmental Protection underthe procedure contained in paragraph


437


(c) of this section is final agency ac-tion.

(e) If the delay in presenting a writ-ten appeal would have a significant ad-verse impact on the appellant, the ap-peal under paragraph (b) or (c) of thissection may initially be presented oral-ly. If an initial presentation of the ap-peal is made orally, the appellant mustsubmit the appeal in writing withinfive days of the oral presentation tothe Coast Guard official to whom theoral presentation was made. The writ-ten appeal must contain, at a mini-mum the basis for the appeal and asummary of the material presentedorally.

[CGD 77–058b, 45 FR 43706, June 30, 1980, asamended by CGD 88–052, 53 FR 25122, July 1,1988; CGD 96–026, 61 FR 33667, 33668, June 28,1996; CGD 97–023, 62 FR 33364, June 19, 1997]

§ 157.07 Equivalents.The Coast Guard may accept an

equivalent, in accordance with the pro-cedure in 46 CFR 30.15–1, of a design oran equipment to fulfill a requirementin this Part, except an operationalmethod may not be substituted for adesign or equipment requirement thatis also required under the MARPOLProtocol.

[CGD 82–28, 50 FR 11625, Mar. 22, 1985, asamended by CGD 97–023, 62 FR 33364, June 19,1997]

Subpart B—Design, Equipment,and Installation

§ 157.08 Applicability of Subpart B.

NOTE: An ‘‘oil tanker’’ as defined in § 157.03includes barges as well as self-propelled ves-sels.

(a) Sections 157.10d and 157.11(g)apply to each vessel to which this partapplies.

(b) Sections 157.11 (a) through (f),157.12, 157.15, 157.19(b)(3), 157.33, and157.37 apply to each vessel to whichthis part applies that carries 200 cubicmeters or more of crude oil or productsin bulk as cargo, as well as to eachoceangoing oil tanker to which thispart applies of 150 gross tons or more.These sections do not apply to a for-eign vessel which remains beyond thenavigable waters of the United Statesand does not transfer oil cargo at a

port or place subject to the jurisdictionof the United States.

(c) Section 157.21 applies to each oiltanker to which this part applies of 150gross tons or more that is oceangoingor that operates on the Great Lakes.This section does not apply to a foreignvessel which remains beyond the navi-gable waters of the United States anddoes not transfer oil cargo at a port orplace subject to the jurisdiction of theUnited States.

(d) Sections in subpart B of 33 CFRpart 157 that are not specified in para-graphs (a) through (c) of this sectionapply to each oceangoing oil tanker towhich this part applies of 150 gross tonsor more, unless otherwise indicated inparagraphs (e) through (m) of this sec-tion. These sections do not apply to aforeign vessel which remains beyondthe navigable waters of the UnitedStates and does not transfer oil cargoat a port or place subject to the juris-diction of the United States.

(e) Sections 157.11 (a) through (f),157.12, and 157.15 do not apply to a ves-sel, except an oil tanker, that carriesless than 1,000 cubic meters of crude oilor products in bulk as cargo and whichretains oily mixtures on board and dis-charges them to a reception facility.

(f) Sections 157.11 (a) through (f),157.12, 157.13, and 157.15 do not apply toa tank vessel that carries only asphalt,carbon black feedstock, or other prod-ucts with similar physical properties,such as specific gravity and cohesiveand adhesive characteristics, that in-hibit effective product/water separa-tion and monitoring.

(g) Sections 157.11 (a) through (f),157.12, 157.13, 157.15, and 157.23 do notapply to a tank barge that cannot bal-last cargo tanks or wash cargo tankswhile underway.

(h) Sections 157.19 and 157.21 do notapply to a tank barge that is certifi-cated by the Coast Guard for limitedshort protected coastwise routes if thebarge is otherwise constructed and cer-tificated for service exclusively on in-land routes.

(i) Section 157.09(d) does not apply toany:

(1) U.S. vessel in domestic trade thatis constructed under a contract award-ed before January 8, 1976;


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33 CFR Ch. I (7–1–98 Edition)§ 157.09

(2) U.S. vessel in foreign trade that isconstructed under a contract awardedbefore April 1, 1977; or

(3) Foreign vessel that is constructedunder a contract awarded before April1, 1977.

(j) Sections 157.09 and 157.10a do notapply to a new vessel that:

(1) Is constructed under a buildingcontract awarded after June 1, 1979;

(2) In the absence of a building con-tract, has the keel laid or is at a simi-lar stage of construction after January1, 1980;

(3) Is delivered after June 1, 1982; or(4) Has undergone a major conversion

for which:(i) The contract is awarded after

June 1, 1979;(ii) In the absence of a contract, con-

version is begun after January 1, 1980;or

(iii) Conversion is completed afterJune 1, 1982.

(k) Sections 157.09(b)(3), 157.10(c)(3),157.10a(d)(3), and 157.10b(b)(3) do notapply to tank barges.

(l) Section 157.10b does not apply totank barges if they do not carry ballastwhile they are engaged in trade involv-ing the transfer of crude oil from anoffshore oil exploitation or productionfacility on the Outer Continental Shelfof the United States.

(m) Section 157.12 does not apply to aU.S. vessel that:

(1) Is granted an exemption underSubpart F of this part; or

(2) Is engaged solely in voyages thatare:

(i) Between ports or places within theUnited States, its territories or posses-sions;

(ii) Of less than 72 hours in length;and

(iii) At all times within 50 nauticalmiles of the nearest land.

(n) Section 157.10d does not apply to:(1) A vessel that operates exclusively

beyond the navigable waters of theUnited States and the United StatesExclusive Economic Zone, as defined in33 U.S.C. 2701(8);

(2) An oil spill response vessel;(3) Before January 1, 2015—(i) A vessel unloading oil in bulk as

cargo at a deepwater port licensedunder the Deepwater Port Act of 1974(33 U.S.C. 1501 et seq.); or

(ii) A delivering vessel that is off-loading oil in bulk as cargo inlightering activities—

(A) Within a lightering zone estab-lished under 46 U.S.C. 3715(b)(5); and

(B) More than 60 miles from the terri-torial sea base line, as defined in 33CFR 2.05–10.

(4) A vessel documented under 46U.S.C., Chapter 121, that was equippedwith a double hull before August 12,1992;

(5) A barge of less than 1,500 grosstons as measured under 46 U.S.C.,Chapter 145, carrying refined petroleumin bulk as cargo in or adjacent to wa-ters of the Bering Sea, Chukchi Sea,and Arctic Ocean and waters tributarythereto and in the waters of the Aleu-tian Islands and the Alaskan Peninsulawest of 155 degrees west longitude; or

(6) A vessel in the National DefenseReserve Fleet pursuant to 50 App.U.S.C. 1744.

[CGD 75–240, 41 FR 54179, Dec. 13, 1976, asamended by CGD 77–058b, 45 FR 43707, June30, 1980; CGD 79–152, 45 FR 82249, Dec. 15, 1980;CGD 76–088b, 48 FR 45720, Oct. 6, 1983; CGD 90–051, 57 FR 36239, Aug. 12, 1992; 57 FR 40494,Sept. 3, 1992; CGD 97–023, 62 FR 33364, June 19,1997]

§ 157.09 Segregated ballast.(a) A new vessel of 70,000 tons DWT or

more must have segregated ballasttanks that have a total capacity toallow the vessel to meet the draft andtrim requirements in paragraph (b) ofthis section without recourse to theuse of oil tanks for water ballast.

(b) In any ballast condition duringany part of a voyage, including that oflightweight with only segregated bal-last, the vessel’s drafts and trim musthave the capability of meeting each ofthe following requirements:

(1) The molded draft amidship (dm)in meters without taking into accountvessel deformation must not be lessthan dm in the following mathematicalrelationship:dm=2.0+0.02L

(2) The drafts at the forward andafter perpendiculars must correspondto those determined by the draftamidship as specified in paragraph(b)(1) of this section, in associationwith the trim by the stern of no morethan 0.015L.


439


(3) The minimum allowable draft atthe after perpendicular is that which isnecessary to obtain full immersion ofthe propeller.

(c) The vessel may be designed tocarry ballast water in cargo tanks dur-ing the condition described in § 157.35.

(d) Segregated ballast spaces, voids,and other noncargo-carrying spaces fora vessel of conventional form must bedistributed:

(1) So that the mathematical averageof the hypothetical collision (Oc) andthe hypothetical stranding (Os) out-flows as determined by the applicationof the procedures in § 157.19 and Appen-dix B is 80 percent or less of the maxi-mum allowable outflow (OA) as deter-mined by § 157.19(b)(1); and

(2) To protect at least 45 percent ofthe sum of the side and bottom shellareas, based upon projected molded di-mensions, within the cargo tanklength. When the vessel design configu-ration does not provide for the spacesto be distributed to protect at least 45percent of the side and bottom shellareas, the spaces must be distributedso that the mathematical average ofthe hypothetical collision (Oc) and thehypothetical stranding (Os) outflows,determined by application of the proce-dures in § 157.19 and Appendix B, is afurther 2 percent less than the maxi-mum allowable outflow (Oa) for each 1percent by which the shell area protec-tion coverage required is not achieved.

(e) A ballast space, void or other non-cargo-carrying space used to meet re-quirements in paragraph (d) of this sec-tion must separate the cargo tankboundaries from the shell plating ofthe vessel by at least 2 meters.

(f) A vessel of conventional form forapplication of this section has:

(1) A block coefficient of .80 or great-er,

(2) A length to depth ratio between 12and 16, and

(3) A breadth to depth ratio between1.5 and 3.5.

(g) Segregated ballast spaces, voids,and other noncargo-carrying spaces fora vessel not of conventional form mustbe distributed in a configuration ac-ceptable to the Coast Guard.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 74–32, 40 FR 49328, Oct. 22,1975; CGD 75–201, 41 FR 1482, Jan. 8, 1976]

§ 157.10 Segregated ballast tanks andcrude oil washing systems for cer-tain new vessels.

(a) This section applies to a new ves-sel that:



(3) Is delivered after June 1, 1982; or(4) Has undergone a major conversion

for which:(i) The contract is awarded after

June 1, 1979;(ii) In the absence of a contract, con-

version is begun after January 1, 1980;or

(iii) Conversion is completed afterJune 1, 1982.

(b) Each tank vessel under this sec-tion of 20,000 DWT or more that carriescrude oil and of 30,000 DWT or morethat carries products must have seg-regated ballast tanks that have a totalcapacity to allow the vessel to meetthe draft and trim requirements inparagraph (c) of this section withoutrecourse to the use of cargo tanks forwater ballast.

(c) In any ballast condition duringany part of a voyage, including that oflightweight with only segregated bal-last, each tank vessel under paragraph(b) of this section must have the capa-bility of meeting each of the following:

(1) The molded draft amidship (dm)in meters, without taking into accountvessel deformation, must not be lessthan dm in the following mathematicalrelationship:

dm=2.0+0.02L(2) The drafts at the forward and

after perpendiculars must correspondto those determined by the draftamidship under paragraph (c)(1) of thissection, in association with a trim bythe stern of no more than 0.015L.

(3) The minimum draft at the afterperpendicular is that which is nec-essary to obtain full immersion of thepropeller.

(d) Segregated ballast tanks requiredin paragraph (b) of this section, voids,and other spaces that do not carrycargo must be distributed:


440

33 CFR Ch. I (7–1–98 Edition)§ 157.10a

(1) For a vessel to which § 157.10d ap-plies, in accordance with § 157.10d(c)(4);or,

(2) For a vessel to which § 157.10d doesnot apply, in accordance with the pro-cedure contained in appendix C to thispart.

(e) Each tank vessel under this sec-tion of 20,000 DWT or more that carriescrude oil must have a crude oil washingsystem that meets the design, equip-ment, and installation requirements inSubpart D of this part.

(f) Each tank vessel under this sec-tion may be designed to carry ballastwater in cargo tanks as allowed under§ 157.35.

[CGD 77–058b, 45 FR 43707, June 30, 1980, asamended by CGD 90–051, 57 FR 36239, Aug. 12,1992]

§ 157.10a Segregated ballast tanks,crude oil washing systems, anddedicated clean ballast tanks forcertain new and existing vessels of40,000 DWT or more.

(a) An existing vessel of 40,000 DWTor more that carries crude oil and anew vessel of 40,000 DWT or more butless than 70,000 DWT that carries crudeoil must have:

(1) Segregated ballast tanks with atotal capacity to meet the draft andtrim requirements in paragraph (d) ofthis section; or

(2) A crude oil washing system thatmeets the design, equipment, and in-stallation requirements of Subpart D ofthis part.

(b) [Reserved](c) An existing vessel of 40,000 DWT

or more that carries products and anew vessel of 40,000 DWT or more butless than 70,000 DWT that carries prod-ucts must have:

(1) Segregated ballast tanks with atotal capacity to meet the draft andtrim requirements in paragraph (d) ofthis section; or

(2) Dedicated clean ballast tanks thathave a total capacity to meet the draftand trim requirements in paragraph (d)of this section and that meet the de-sign and equipment requirementsunder Subpart E of this part.

(d) In any ballast condition duringany part of a voyage, including that oflightweight with either segregated bal-last in segregated ballast tanks or

clean ballast in dedicated clean ballasttanks, each tank vessel under para-graph (a)(1), or (c) of this section musthave the capability of meeting each ofthe following without recourse to theuse of cargo tanks for water ballast:

(1) The molded draft amidship (dm)in meters, without taking into accountvessel deformation, must not be lessthan dm in the following mathematicalrelationship:dm=2.0+0.02L

(2) The drafts at the forward andafter perpendiculars must correspondto those determined by the draftamidship under paragraph (d)(1) of thissection, in association with a trim bythe stern of no more than 0.015L.


(e) Each tank vessel that meets para-graph (a)(1), or (c) of this section maybe designed to carry ballast water incargo tanks as allowed under § 157.35.

NOTE: Segregated ballast tanks located inwing tanks provide protection against oiloutflow in the event of a collision, ramming,or grounding.

[CGD 77–058b, 45 FR 43707, June 30, 1980, asamended by CGD 82–28, 50 FR 11626, Mar. 22,1985; USCG–1998–3799, 63 FR 35531, June 30,1998]

§ 157.10b Segregated ballast tanks,dedicated clean ballast tanks, andspecial ballast arrangements fortank vessels transporting OuterContinental Shelf oil.

(a) Each tank vessel that is engagedin the transfer of crude oil from an off-shore oil exploitation or production fa-cility on the Outer Continental Shelf ofthe United States on or after June 1,1980 must, if segregated ballast tanksor dedicated clean ballast tanks arenot required under § 157.09, § 157.10 or§ 157.10a, have one of the following:

(1) Segregated ballast tanks with atotal capacity to meet the draft andtrim requirements in paragraph (b) ofthis section.

(2) Dedicated clean ballast tanks hav-ing a total capacity to meet the draftand trim requirements in paragraph (b)of this section and meeting the designand equipment requirements underSubpart E of this part.


441

Coast Guard, DOT § 157.10c

(3) Special ballast arrangements ac-ceptable to the Coast Guard.

(b) In any ballast condition duringany part of a voyage, including that oflightweight with either segregated bal-last in segregated ballast tanks orclean ballast in dedicated clean ballasttanks, each vessel under paragraph(a)(1) or (a)(2) of this section must havethe capability of meeting each of thefollowing:

(1) The molded draft amidship (dm),in meters, without taking into accountvessel deformation, must not be lessthan ‘‘dm’’ in the following mathe-matical relationship:

dm=2.00+0.020L for vessels of 150 meters ormore in length

dm=1.25+0.025L for vessels less than 150 me-ters in length

(2) The drafts, in meters, at the for-ward and after perpendiculars mustcorrespond to those determined by thedraft amidship under paragraph (b)(1)of this section, in association with atrim, in meters, by the stern (t) of nomore than ‘‘t’’ in the following mathe-matical relationship:

t=0.015L for vessels of 150 meters ormore in length

t=1.5+0.005L for vessels less than 150meters in length


(c) Special ballast arrangements areaccepted under the procedures in para-graph (d) of this section if:

(1) The vessel is dedicated to one spe-cific route;

(2) Each offshore transfer facility onthe route is less than 50 miles fromshore;

(3) The duration of the ballast voyageis less than 10 hours;

(4) They prevent the mixing of bal-last water and oil; and

(5) They provide suitable draft andtrim to allow for the safe navigation ofthe vessel on the intended route.

(d) The owner or operator of a vesselthat meets paragraph (c) of this sectionmust apply for acceptance of the spe-cial ballast arrangement, in writing, tothe Officer in Charge, Marine Inspec-tion, of the zone in which the vessel op-erates. The application must contain:

(1) The specific route on which thevessel would operate;

(2) The type of ballast to be carried;(3) The location of the ballast on the

vessel;(4) Calculations of draft and trim for

maximum ballast conditions; and(5) The associated operating require-

ments or limitations necessary to en-sure safe navigation of the vessel.

NOTE: Operating requirements or limita-tions necessary to ensure safe navigation ofthe vessel could include (but are not limitedto) weather conditions under which the ves-sel would not operate and weather conditionsunder which cargo would be carried in cer-tain cargo tanks on the ballast voyage.

(e) The Coast Guard will inform eachapplicant for special ballast arrange-ments under paragraph (d) of this sec-tion whether or not the arrangementsare accepted. If they are not accepted,the reasons why they are not acceptedwill be stated.

(f) Each tank vessel under this sec-tion may be designed to carry ballastwater in cargo tanks, as allowed under§ 157.35.

[CGD 79–152, 45 FR 82249, Dec. 15, 1980]

§ 157.10c Segregated ballast tanks,crude oil washing systems, anddedicated clean ballast tanks forcertain new and existing tankshipsof 20,000 to 40,000 DWT.

(a) This section applies to each tank-ship of 20,000 DWT or more, but lessthen 40,000 DWT, except each onethat—



(3) Is delivered after June 1, 1982; or(4) Has undergone a major conver-

sion, for which—(i) The contract is awarded after

June 1, 1979; or(ii) Conversion is completed after

June 1, 1982.(b) On January 1, 1986, or 15 years

after the date it was delivered to theoriginal owner or 15 years after thecompletion of a major conversion,whichever is later, a vessel under thissection that carries crude oil musthave—


442

33 CFR Ch. I (7–1–98 Edition)§ 157.10d

(1) Segregated ballast tanks thathave a total capacity to allow the ves-sel to meet the draft and trim require-ments in § 157.09(b); or

(2) A crude oil washing system thatmeets the design, equipment, and in-stallation requirements of §§157.122through 157.138.

(c) On January 1, 1986, or 15 yearsafter the date it was delivered to theoriginal owner or 15 years after thecompletion of a major conversion,whichever is later, a vessel under thissection that carries product musthave—

(1) Segregated ballast tanks thathave total capacity to allow the vesselto meet the draft and trim require-ments in § 157.09(b); or

(2) Dedicated clean ballast tanks thatmeet the design and equipment re-quirements under §§ 157.220, 157.222, and157.224 and have total capacity to allowthe vessel to meet the draft and trimrequirements in § 157.09(b).

(d) If the arrangement of tanks on avessel under this section is such that,when using the tankage necessary tocomply with the draft and trim re-quirements in §157.09(b), the draftamidships exceeds the minimum re-quired draft by more the 10 percent, orthe arrangement results in the propel-ler being fully immersed by more than10 percent of its diameter, alternativearrangements may be accepted pro-vided—

(1) At least 80 percent of the propellerdiameter is immersed; and

(2) The moulded draft amidships is atleast 80 percent of that required under§ 157.09(b)(1).

[CGD 82–28, 50 FR 11626, Mar. 22, 1985; 50 FR12800, Apr. 1, 1985]

§ 157.10d Double hulls on tank vessels.

(a) With the exceptions stated in§ 157.08(n), this section applies to atank vessel—

(1) For which the building contract isawarded after June 30, 1990;

(2) That is delivered after December31, 1993;

(3) That undergoes a major conver-sion for which;

(i) The contract is awarded afterJune 30, 1990; or

(ii) Conversion is completed after De-cember 31, 1993; or

(4) That is otherwise required to havea double hull by 46 U.S.C. 3703a(c).

NOTE: 46 U.S.C. 3703a(c) is shown in appen-dix G to this part.

(b) Each vessel to which this sectionapplies must be fitted with:

(1) A double hull in accordance withthis section; and

(2) If § 157.10 applies, segregated bal-last tanks and a crude oil washing sys-tem in accordance with that section.

(c) Except on a vessel to which§ 157.10d(d) applies, tanks within thecargo tank length that carry any oilmust be protected by double sides anda double bottom as follows:

(1) Double sides must extend for thefull depth of the vessel’s side or fromthe uppermost deck, disregarding arounded gunwale where fitted, to thetop of the double bottom. At any crosssection, the molded width of the doubleside, measured at right angles to theside shell plating, from the side oftanks containing oil to the side shellplating, must not be less than the dis-tance w as shown in Figure 157.10d(c)and specified as follows:

(i) For a vessel of 5,000 DWT andabove: w=[0.5+(DWT/20,000)] meters; or,w=2.0 meters (79 in.), whichever is less,but in no case less than 1.0 meter (39in.).

(ii) For a vessel of less than 5,000DWT: w=[0.4+(2.4)(DWT/20,000)] meters,but in no case less than 0.76 meter (30in.).

(iii) For a vessel to which paragraph(a)(4) of this section applies: w=0.76meter (30 in.), provided that the doubleside was fitted under a construction orconversion contract awarded prior toJune 30, 1990.


443

Coast Guard, DOT § 157.10d

(2) At any cross section, the moldeddepth of the double bottom, measuredat right angles to the bottom shellplating, from the bottom of tanks con-

taining oil to the bottom shell plating,must not be less than the distance h asshown in Figure 157.10d(c) and specifiedas follows:


444

33 CFR Ch. I (7–1–98 Edition)§ 157.10d

(i) For a vessel of 5,000 DWT andabove: h=B/15; or, h=2.0 meters (79 in.),whichever is less, but in no case lessthan 1.0 meter (39 in.).

(ii) For a vessel of less than 5,000DWT: h=B/15, but in no case less than0.76 meter (30 in.).

(iii) For a vessel to which paragraph(a)(4) of this section applies: h=B/15; or,h=2.0 meters (79 in.), whichever is thelesser, but in no case less than 0.76meter (30 in.), provided that the doublebottom was fitted under a constructionor conversion contract awarded priorto June 30, 1990.

(3) For a vessel built under a contractawarded after September 11, 1992, with-in the turn of the bilge or at cross sec-tions where the turn of the bilge is notclearly defined, tanks containing oil

must be located inboard of the outershell—

(i) For a vessel of 5,000 DWT andabove: At levels up to 1.5h above thebase line, not less than the distance h,as shown in Figure 157.10d(c) and speci-fied in paragraph (c)(2) of this section.At levels greater than 1.5h above thebase line, not less than the distance w,as shown in Figure 157.10d(c) and speci-fied in paragraph (c)(1) of this section.

(ii) For a vessel of less than 5,000DWT: Not less than the distance habove the line of the mid-ship flat bot-tom, as shown in Figure 157.10d(c)(3)(ii)and specified in paragraph (c)(2) of thissection. At levels greater than h abovethe line of the mid-ship flat bottom,not less than the distance w, as shownin Figure 157.10d(c)(3)(ii) and specifiedin paragraph (c)(1) of this section.


445

Coast Guard, DOT § 157.10d

(4) For a vessel to which § 157.10(b) ap-plies that is built under a contractawarded after September 11, 1992.

(i) The aggregate volume of the dou-ble sides, double bottom, forepeaktanks, and afterpeak tanks must not beless than the capacity of segregated


446

33 CFR Ch. I (7–1–98 Edition)§ 157.11

ballast tanks required under § 157.10(b).Segregated ballast tanks that may beprovided in addition to those requiredunder § 157.10(b) may be located any-where within the vessel.

(ii) Double side and double bottomtanks used to meet the requirements of§ 157.10(b) must be located as uniformlyas practicable along the cargo tanklength. Large inboard extensions of in-dividual double side and double bottomtanks, which result in a reduction ofoverall side or bottom protection, mustbe avoided.

(d) A vessel of less than 10,000 DWTthat is constructed and certificated forservice exclusively on inland or limitedshort protected coastwise routes mustbe fitted with double sides and a doublebottom as follows:

(1) A minimum of 61 cm. (2 ft.) fromthe inboard side of the side shell plate,extending the full depth of the side orfrom the main deck to the top of thedouble bottom, measured at right an-gles to the side shell; and

(2) A minimum of 61 cm. (2 ft.) fromthe top of the bottom shell plating,along the full breadth of the vessel’sbottom, measured at right angles tothe bottom shell.

(3) For a vessel to which paragraph(a)(4) of this section applies, the widthof the double sides and the depth of thedouble bottom may be 38 cm. (15 in.), inlieu of the dimensions specified inparagraphs (d)(1) and (d)(2) of this sec-tion, provided that the double side anddouble bottom tanks were fitted undera construction or conversion contractawarded prior to June 30, 1990.

(4) For a vessel built under a contractawarded after September 11, 1992, aminimum 46 cm. (18 in.) clearance forpassage between framing must bemaintained throughout the doublesides and double bottom.

(e) Except as provided in paragraph(e)(3) of this section, a vessel must notcarry any oil in any tank extendingforward of:

(1) The collision bulkhead; or(2) In the absence of a collision bulk-

head, the transverse plane perpendicu-lar to the centerline through a pointlocated:

(i) The lesser of 10 meters (32.8 ft.) or5 percent of the vessel length, but in no

case less than 1 meter (39 in.), aft ofthe forward perpendicular;

(ii) On a vessel of less than 10,000DWT tons that is constructed and cer-tificated for service exclusively on in-land or limited short protected coast-wise routes, the lesser of 7.62 meters (25ft.) or 5 percent of the vessel length,but in no case less than 61 cm. (2 ft.),aft of the headlog or stem at thefreeboard deck; or

(iii) On each vessel which operatesexclusively as a box or trail barge, 61cm. (2 ft.) aft of the headlog.

(3) This paragraph does not apply toindependent fuel oil tanks that must belocated on or above the main deckwithin the areas described in para-graphs (e)(1) and (e)(2) of this section toserve adjacent deck equipment thatcannot be located further aft. Suchtanks must be as small and as far aftas is practicable.

(f) On each vessel, the cargo tanklength must not extend aft to anypoint closer to the stern than the dis-tance equal to the required width ofthe double side, as prescribed in§ 157.10d(c)(1) or § 157.10d(d)(1).

[CGD 90–051, 57 FR 36239, Aug. 12, 1992]

§ 157.11 Pumping, piping and dis-charge arrangements.

(a) Each tank vessel must have afixed piping system for transferringcargo residues and other oily mixturesfrom cargo tanks to slop tanks and fordischarging oily mixtures to the seaand to reception facilities. On a vesselthat has two or more independent pip-ing arrangements, the arrangementscollectively form the fixed piping sys-tem required by this paragraph.

(b) Each fixed piping system requiredby paragraph (a) of this section musthave:

(1) At least two manifolds on theweather deck for transferring oily mix-tures to reception facilities, one ofwhich is on the port side of the vesseland one of which is on the starboardside; and

(2) Except as provided in paragraph(c) of this section, at least one dis-charge point that:

(i) Is used for discharges to the sea;(ii) Is on a port or starboard weather

deck or on the vessel’s side above the


447


waterline of its deepest ballast condi-tion; and

(iii) Has an automatic stop valve thatis actuated by a cargo monitor signal,except that manual valves may be pro-vided on new vessels of less than 4,000tons deadweight and on existing ves-sels.

(c) An above waterline dischargepoint is not required on an existingvessel if its fixed piping system meetsParagraphs 3 and 4 of Appendix E ofthis part.

(d) Each tank vessel under § 157.09,§ 157.10a, or § 157.10b that carries crudeoil must have:

(1) Equipment that drains each cargopump and oil piping line of oil residue;

(2) Oil piping lines for the draining ofoil residue from cargo pumps and otheroil piping lines to a cargo tank or aslop tank; and

(3) An oil piping line that meets para-graph (f) of this section and is con-nected to the cargo discharge piping onthe outboard side of the manifoldvalves for the draining of oil residuefrom cargo pumps and other oil pipinglines to a receptacle on the shore.

(e) Each tank vessel under § 157.10must have:

(1) Oil piping lines that are designedand installed to minimize oil retentionin those lines;

(2) Equipment that drains each cargopump and oil piping line of oil residue;

(3) Oil piping lines for the draining ofoil residue from cargo pumps and otheroil piping lines to a cargo tank or sloptank; and

(4) An oil piping line that meets para-graph (f) of this section and is con-nected to the cargo discharge piping onthe outboard side of the manifoldvalves for the draining of oil residuefrom cargo pumps and other oil pipinglines to a receptacle on the shore.

(f) Each oil piping line under para-graph (d)(3) or (e)(4) of this sectionmust have a cross-sectional area of 10percent or less of the cross-sectionalarea of the main cargo discharge pipingline, except if the oil piping line underparagraph (d)(3) of this section is in-stalled before January 1, 1980, that pip-ing line may have a cross-sectionalarea of 25 percent or less of the cross-sectional area of the main cargo dis-charge piping line.

(g) Each tank vessel to which § 157.10dapplies that is built under a contractawarded after September 11, 1992 mustbe arranged so that:

(1) Except for short lengths of com-pletely welded (or equivalent) piping,

(i) Ballast piping and other piping toballast tanks, such as sounding andvent piping, do not pass through cargotanks, and

(ii) Cargo piping and other piping tocargo tanks do not pass through bal-last tanks;

(2) Suction wells in cargo tanks thatprotrude into the double bottom are assmall as practicable and extend nocloser to the bottom shell plating than0.5h, as specified in § 157.10d(c)(2) or§ 157.10d(d)(2), as applicable; and

(3) On a vessel that is constructedand certificated for service exclusivelyon inland, Great Lakes, or limitedshort protected coastwise routes, anyoil piping that is located within doublehull spaces must be placed as far fromthe outer shell as is practicable andmust be fitted with valves at the pointof connection to the tank served, toprevent oil outflow in the event ofdamage to the piping. Such valvesmust be closed whenever the vessel isunderway with any oil in tanks servedby the associated piping, except as nec-essary during transfer operations.

NOTE: Piping location requirements for anoceangoing vessel are in § 157.19(d). Relatedoperating requirements are in § 157.45.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 80–78, 45 FR 43704, June 30,1980; CGD 77–058b, 45 FR 43708, June 30, 1980;CGD 79–152, 45 FR 82250, Dec. 15, 1980; CGD 76–088b, 48 FR 45720, Oct. 6, 1983; CGD 90–051, 57FR 36244, Aug. 12, 1992]

§ 157.12 Cargo monitor and controlsystem.

(a) Each vessel must have, for eachtype of cargo oil that it carries, atleast one cargo monitor that is de-signed for use with that oil.

(b) Each monitor installed on a U.S.vessel must be approved under 46 CFR162.050. Each monitor installed on aforeign vessel must be approved:

(1) Under 46 CFR 162.050; or(2) As meeting IMO Resolution

A.393(X) by a country that has ratifiedthe MARPOL Protocol.


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33 CFR Ch. I (7–1–98 Edition)§ 157.13

(c) Each monitor must be installed inaccordance with Paragraphs 4, 5, and 6of Appendix F to this part and be fittedwith the control system prescribed byparagraphs 6.1.4.2 through 6.1.4.5.5 ofthat appendix.

[CGD 76–088b, 48 FR 45720, Oct. 6, 1983, asamended by USCG–1998–3799, 63 FR 35531,June 30, 1998]

§ 157.13 Designated observation area.Each new vessel must have a des-

ignated observation area on the weath-er deck or above that is:

(a) Located where the effluent fromeach discharge point and manifold de-scribed in §157.11 can be visually ob-served; and

(b) Equipped with:(1) A means to directly stop the dis-

charge of effluent into the sea; or(2) A positive communication system,

such as a telephone or a radio, betweenthe observation area and the dischargecontrol position.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 76–088b, 48 FR 45720, Oct. 6,1983]

§ 157.15 Slop tanks in tank vessels.(a) Number. A tank vessel must have

the following number of slop tanksthat comply with the requirements ofthis section:

(1) A new vessel of less than 70,000tons DWT and an existing vessel musthave at least one slop tank.

(2) A new vessel of 70,000 tons DWT ormore must have at least two sloptanks.

(b) Capacity. Slop tanks must havethe total capacity to retain slops fromtank washings, oil residues, and dirtyballast residues of three percent ormore of the oil carrying capacity, ex-cept two percent capacity is allowed ifthere are:

(1) Segregated ballast tanks thatmeet the requirements in § 157.09,§ 157.10, § 157.10a, or § 157.10b; or

(2) No eductors arrangements thatuse water in addition to the washingwater.

(c) Design. A slop tank required inthis section:

(1) Must minimize turbulence, en-trainment of oil, and the creation of anemulsion by the use of separate inletand outlet connections; and

(2) May carry bulk oil when not beingused as a slop tank.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975]

EDITORIAL NOTE: For FEDERAL REGISTER ci-tations affecting § 157.15, see the List of CFRSections Affected in the Finding Aids sec-tion of this volume.

§ 157.17 Oily residue tank.(a) A tank vessel of 400 gross tons or

more must have a tank that receivesand holds oily residue resulting frompurification of fuel and lubricating oiland from oil leakages in machineryspaces.

(b) Each oily residue tank required inparagraph (a) of this section must havean adequate capacity that is deter-mined by the:

(1) Type of machinery installed onthe vessel; and

(2) Maximum fuel oil capacity.(c) Each oily residue tank on a new

vessel must be designed to facilitate:(1) Cleaning; and(2) Discharging to a reception facil-

ity.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 80–78, 45 FR 43704, June 30,1980]

§ 157.19 Cargo tank arrangement andsize.

(a) This section applies to:(1) A U.S. or foreign vessel that is de-

livered after January 1, 1977;(2) A U.S. vessel that is delivered be-

fore January 1, 1977, for which thebuilding contract is awarded after Jan-uary 1, 1972, or, if there is no buildingcontract, the keel is laid or the vesselis at a similar stage of constructionafter June 30, 1972; and

(3) A foreign vessel that is deliveredbefore January 1, 1977, for which thebuilding contract is awarded after Jan-uary 1, 1974, or, if there is no buildingcontract, the keel is laid or the vesselis at a similar stage of constructionafter June 30, 1974.

(b) As determined in accordance withthe procedures contained in AppendixA of this part, each cargo tank must beof such size and arrangement that:

(1) The hypothetical outflow for sidedamage (Oc) or for bottom damage (Os)anywhere within the length of the ves-sel must not exceed OA (30,000 cubicmeters or (400)×(3√ DWT) whichever is


449


greater, limited to a maximum of 40,000cubic meters);

(2) The volume of each wing tank andcenter tank is less than the allowablevolume of a wing tank (VOLW) and theallowable volume of a center tank(VOLC) respectively; and

(3) The length of a tank is less thanthe allowable length of a tank (la).

(c) If a cargo transfer system inter-connects two or more cargo tanks, thesystem must have valves to segregatethe tanks from each other.

(d) If a line of piping that runsthrough a cargo tank in a position lessthan tc from the vessel’s side or lessthan vs from the vessel’s bottom as de-fined in Appendix A of this part, has abranch, that branch must have a stopvalve:

(1) Within each cargo tank intowhich the branch opens; or

(2) Outside each tank into which thebranch opens in a location that is im-mediately adjacent to the point atwhich the branch enters the tank.

(e) If piping that serves suction wellsis installed within a double bottom,that piping must be:

(1) Fitted with valves located at thepoint of connection to the tank servedto prevent oil outflow in the event ofdamage to the piping; and

(2) Designed to be installed as highfrom the bottom shell as possible.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 75–240, 41 FR 54180, Dec. 13,1976; CGD 76–088b, 48 FR 45720, Oct. 6, 1983]

CROSS REFERENCE: See 33 CFR 151.50 (39 FR30125) for an interpretative rule concerningtank arrangement and size limitations appli-cable to seagoing tank barges.

§ 157.21 Subdivision and stability.A new vessel that is a U.S. vessel

must meet the following subdivisionand damage stability criteria after as-suming side and bottom damages, asdefined in Appendix B of this Part. AU.S. vessel that meets the require-ments in this section is considered bythe Coast Guard as meeting 46 CFR42.20–5.

(a) The final waterline, taking intoaccount sinkage, heel, and trim, mustbe below the lower edge of an openingthrough which progressive floodingmay take place, such as an air pipe, orany opening that is closed by means of

a weathertight door or hatch cover.This opening does not include an open-ing closed by a:

(1) Watertight manhole cover;(2) Flush scuttle;(3) Small watertight cargo tank

hatch cover that maintains the highintegrity of the deck;

(4) Remotely operated watertightsliding door; or

(5) Side scuttle of the non-openingtype.

(b) In the final stage of flooding, theangle of heel due to unsymmetricalflooding must not exceed 25 degrees,except that this angle may be in-creased to 30 degrees if no deck edgeimmersion occurs.

(c) For acceptable stability in thefinal stage of flooding, the rightinglever curve must have a range of atleast 20 degrees beyond the position ofequilibrium in association with a maxi-mum residual righting lever of at least0.1 meter. For the calculations requiredin this section, weathertight openingsor openings fitted with automatic clo-sures (e.g., a vent fitted with a ballcheck valve), need not be considered aspoints of downflooding within therange of residual stability, but otheropenings must be accounted for in thecalculation.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 75–240, 41 FR 54180, Dec. 13,1976]

§ 157.23 Cargo and ballast system in-formation.

(a) Each tank vessel to which thispart applies must have an instructionmanual that describes the automaticand manual operation of the cargo andballast system in the vessel.

(b) The format and information con-tained in the instruction manual re-quired in paragraph (a) of this sectionmust be similar to the manual entitled‘‘Clean Seas Guide for Oil Tankers’’which can be obtained from the Inter-national Chamber of Shipping, 30–32 St.Mary Axe, London, England, EC3A 8ET.

§ 157.24 Submission of calculations,plans, and specifications.

The owner, builder or designer of anew vessel to which this part appliesshall submit the documentation speci-fied in this section to the Coast Guard


450

33 CFR Ch. I (7–1–98 Edition)§ 157.24a

before that vessel enters the navigablewaters of the United States. Theowner, builder, or designer of a vesselthat must comply with § 157.10d shallsubmit the documentation specified inthis section to the Coast Guard beforethat vessel enters the navigable watersof the United States or the U.S. Exclu-sive Economic Zone.

(a) Calculations to substantiate com-pliance with the tank arrangement andsize requirements under § 157.19, or aletter from the government of the ves-sel’s flag state that certifies compli-ance with:

(1) Section 157.19; or(2) Regulations 24 of Annex I of the

International Convention for the Pre-vention of Pollution from Ships, 1973.

(b) Except for a new vessel that is aforeign vessel, calculations to substan-tiate compliance with subdivisions anddamage stability requirements under§ 157.21.

(c) Plans and calculations to substan-tiate compliance with the applicablesegregated ballast and double hull re-quirements in §§ 157.09, 157.10, 157.10a,157.10b, or 157.10d, or certification fromthe government of the vessel’s flagstate that the vessel complies with thesegregated ballast and double hull re-quirements in:

(1) Sections 157.09, 157.10, 157.10a,157.10b, or 157.10d, as applicable; or

(2) For a vessel to which § 157.10d doesnot apply, Regulations 13 and 13E ofthe MARPOL Protocol.

(d) Plans and specifications for thevessel that include:

(1) Design characteristics;(2) A lines plan;(3) Curves of form (hydrostatic

curves) or hydrostatic tables;(4) A general arrangement plan of

each deck and level;(5) Inboard and outboard profile plans

showing oiltight and watertight bulk-heads;

(6) A midship section plan;(7) A capacity plan showing the ca-

pacity and the vertical and longitu-dinal centers of gravity of each cargospace, tank, and similar space;

(8) Tank sounding tables or tank ca-pacity tables;

(9) Draft mark locations;(10) Detailed plans of watertight

doors; and

(11) Detailed plans of vents.

[CGD 75–240, 41 FR 54180, Dec. 13, 1976, asamended by CGD 77–058b, 45 FR 43708, June30, 1980; CGD 79–152, 45 FR 82250, Dec. 15, 1980;CGD 90–051, 57 FR 36244, Aug. 12, 1992]

§ 157.24a Submission of calculations,plans, and specifications for exist-ing vessels installing segregatedballast tanks.

(a) Before modifications are made toa U.S. tank vessel to meet§ 157.10a(a)(1), § 157.10a(c)(1),§ 157.10c(b)(1), or § 157.10c(c)(1), the ves-sel’s owner or operator must submitthe following to the Officer in Charge,Marine Inspection, of the zone wherethe modification will be made or to theappropriate Coast Guard technical of-fice listed in 157.100(b):

(1) A drawing or diagram of thepumping and piping system for the seg-regated ballast tanks.

(2) A drawing of the segregated bal-last tank arrangement.

(3) Documentation, calculations, orrevised stability information to showthat the vessel, with the addition ofthe segregated ballast tanks, meets thestability standards for load line assign-ment in 46 CFR Part 42.

(4) Documentation, calculations, or arevised loading manual to show thatthe vessel, with the addition of the seg-regated ballast tanks, meets the struc-tural standards in 46 CFR Part 32.

(5) Plans and calculations to showthat the vessel, as modified, complieswith the segregated ballast capacityand distribution requirements in§ 157.10a.

(b) Before each foreign vessel under§ 157.10a(a)(1) or § 157.10a(c)(1) enters thenavigable waters of the United States,the owner or operator of that vesselmust—

(1) Submit to the Commandant (G–MOC), U.S. Coast Guard, Washington,D.C. 20593–0001—

(i) A letter from the authority thatassigns the load line to the vessel find-ing that the location of the segregatedballast tanks is acceptable; and

(ii) Plans and calculations to sub-stantiate compliance with the seg-regated ballast capacity requirementsin § 157.09(b); or

(2) Submit to the Officer in Charge,Marine Inspection, of the zone in which


451


the first U.S. port call is made, a letteror document from the government ofvessel’s flag state certifying that thevessel complies with the segregatedballast capacity requirements in§ 157.09(b) or Regulation 13 of theMARPOL Protocol.

(c) On January 1, 1986, or 15 yearsafter the date it was delivered to theoriginal owner, or 15 years after thecompletion of a major conversion,whichever is later, before that vesselenters the navigable waters of theUnited States, the owner or operator ofan existing foreign vessel under§ 157.10c(b)(1) or § 157.10c(c)(1) must—

(1) Submit to the Commandant (G–MOC), U.S. Coast Guard, Washington,D.C. 20593–0001—

(i) A letter from the authority thatassigns the load line to the vessel find-ing that the location of the segregatedballast tanks is acceptable; and

(ii) Plans and calculations to sub-stantiate compliance with the applica-ble segregated ballast capacity require-ments in § 157.09(b) or § 157.10c(d); or

(2) Submit to the Officer in Charge,Marine Inspection, of the zone in whichthe first U.S. port call is made a letterfrom an authorized CS or the govern-ment of the vessel’s flag state certify-ing that the vessel complies with thesegregated ballast capacity require-ments in § 157.09(b) or § 157.10c(d).


[CGD 82–28, 50 FR 11626 and 11630, Mar. 22,1985, as amended by CGD 88–052, 53 FR 25122,July 1, 1988; CGD 96–026, 61 FR 33668, June 28,1996]

Subpart C—Vessel Operation

§ 157.25 Applicability of subpart C.

(a) This subpart applies to each ves-sel to which this part applies of 150gross tons or more, unless otherwiseindicated, that carries crude oil orproducts in bulk as cargo. This subpartdoes not apply to a foreign vesselwhich remains beyond the navigablewaters of the United States and doesnot transfer oil cargo at a port or placesubject to the jurisdiction of theUnited States.

(b) Sections 157.29, 157.31, 157.37(a)(5),157.37(a)(6) and 157.43 apply to foreignvessels when they discharge into thenavigable waters of the United States.

(c) Sections 157.35, 157.37, exceptparagraphs (a)(5) and (a)(6), 157.39,157.45, and 157.47 do not apply to foreignvessels.

[CGD 76–088b, 48 FR 45720, Oct. 6, 1983, asamended by CGD 90–051, 57 FR 36244, Aug. 12,1992]

§ 157.26 Operation of a tank vessel inviolation of regulations.

No person may cause or authorize theoperation of a tank vessel in violationof the regulations in this part.

[CGD 77–058b, 45 FR 43708, June 30, 1980]

§ 157.27 Discharges: Tank vessels car-rying oil exclusively on rivers,lakes, bays, sounds, and the GreatLakes, and seagoing tank vessels ofless than 150 gross tons.

Unless a tank vessel carrying oil ex-clusively on rivers, lakes, bays, sounds,and the Great Lakes, or a seagoingtank vessel of less than 150 gross tonsdischarges clean ballast or segregatedballast, the vessel must:

(a) Retain on board any oily mixture;or

(b) Transfer an oily mixture to a re-ception facility.

§ 157.28 Discharges from tank bargesexempted from certain design re-quirements.

The person in charge of a tank bargeexempted under § 157.08(g) from the re-quirements in §§ 157.11, 157.13, 157.15,and 157.23 shall ensure that while thebarge is proceeding en route:

(a) Cargo tanks are not ballasted orwashed; and

(b) Oil or oily mixtures are not dis-charged.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 76–088b, 48 FR 45721, Oct. 6,1983; CGD 90–051, 57 FR 36244, Aug. 12, 1992]

§ 157.29 Discharges: Seagoing tank ves-sels of 150 gross tons or more.

Unless a seagoing tank vessel of 150gross tons or more discharges an oilymixture in compliance with the re-quirements in § 157.37, § 157.39, or§ 157.43, the vessel must:

(a) Retain the mixture; or


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33 CFR Ch. I (7–1–98 Edition)§ 157.31

(b) Transfer the mixture to a recep-tion facility.

§ 157.31 Discharges: Chemical addi-tives.

No person may use a chemical addi-tive to circumvent the discharge re-quirements in §§ 157.27, 157.29, 157.37,157.39, and 157.43.

§ 157.33 Water ballast in oil fuel tanks.A new vessel may not carry ballast

water in an oil fuel tank.

§ 157.35 Ballast added to cargo tanks.The master of a tank vessel with seg-

regated ballast tanks or dedicatedclean ballast tanks under § 157.09,§ 157.10, § 157.10a(a)(1), § 157.10a(b),§ 157.10a(c), § 157.10b(a), § 157.10c(b)(1), or§ 157.10c(c) shall ensure that ballastwater is carried in a cargo tank onlyif—

(a) The vessel encounters abnormallysevere weather conditions;

(b) More ballast water than can becarried in segregated ballast tanks ordedicated clean ballast tanks is nec-essary for the safety of the vessel;

(c) The ballast water is processed anddischarged in compliance with § 157.37;and

(d) On a new vessel under § 157.10 thatcarries crude oil, the ballast water isonly carried in a cargo tank that iscrude oil washed in accordance withSubpart D of this part during or afterthe most recent discharge of crude oilfrom that tank.

[CGD 77–058b, 45 FR 43708, June 30, 1980, asamended by CGD 82–28, 50 FR 11626, Mar. 22,1985]

§ 157.37 Discharge of cargo residue.(a) A tank vessel may not discharge

an oily mixture into the sea from acargo tank, slop tank, or cargo pumproom bilge unless the vessel:

(1) Is more than 50 nautical milesfrom the nearest land;

(2) Is proceeding en route;(3) Is discharging at an instantaneous

rate of oil content not exceeding 60 li-ters per nautical mile;

(4) Is an existing vessel and the totalquantity of oil discharged into the seadoes not exceed 1/15,000 of the totalquantity of the cargo that the dis-charge formed a part, or is a new vessel

and the total quantity of oil dischargedinto the sea does not exceed 1/30,000 ofthe total quantity of the cargo that thedischarge formed a part;

(5) Discharges:(i) Through the above waterline dis-

charge point described in § 157.11(b)(2);(ii) In accordance with Paragraph 5 of

Appendix E to this part, if the vessel isan existing vessel with a Part FlowSystem meeting that appendix; or

(iii) Below the waterline in accord-ance with paragraph (e) of this section;

(6) Has in operation a cargo monitorand control system required by § 157.12that is designed for use with the oilymixture being discharged, except thatthe system may be operated manuallyif:

(i) The automatic system fails duringa ballast voyage;

(ii) The failure is recorded in the OilRecord Book;

(iii) The master ensures that the dis-charge is constantly monitored vis-ually and promptly terminated whenoil is detected in the discharge; and

(iv) The system is operated manuallyonly until the ballast voyage is com-pleted; and

(7) Is outside the ‘‘Special Areas’’ de-fined in Regulation 1 (10) of Annex I tothe MARPOL Protocol.

(b) A seagoing tank vessel of 150gross tons or more that carries asphaltor other products whose physical prop-erties inhibit effective product/waterseparation and monitoring must trans-fer all residues and tank washings fromsuch cargoes to a reception facility.

(c) Each cargo monitor must bemaintained and operated in accordancewith its instructions manual.

(d) All discharge data recorded by acargo monitor must be retained for atleast three years. The data for themost recent year must be retained onboard the vessel.

(e) Ballast containing an oily mix-ture may be discharged below the wa-terline at sea by gravity if:

(1) The ballast is not from a sloptank;

(2) Examination with an oil-waterinterface detector shows that oil-waterseparation has taken place; and


453


(3) The oil layer is high enough in thetank so that it will not be discharged.

(The information collection requirementcontained in paragraph (d) of this sectionwas approved by the Office of Managementand Budget under OMB control number 2115–0518)

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 76–088b, 48 FR 45721, Oct. 6,1983]

§ 157.39 Machinery space bilges.

(a) A tank vessel may discharge anoily mixture from a machinery spacebilge that is combined with an oilcargo mixture if the vessel dischargesin compliance with § 157.37.

(b) A tank vessel may discharge anoily mixture from a machinery spacebilge that is not combined with an oilcargo mixture if the vessel:

(1) Is more than 12 nautical milesfrom the nearest land;

(2) Is proceeding en route;(3) Is discharging an effluent with an

oil content of less than 100 parts permillion; and

(4) Has in operation an oil dischargemonitoring and control system ap-proved by the Coast Guard (specifica-tion regulation to be proposed) and oilwater separating equipment approvedby the Coast Guard (specification regu-lation to be proposed).

§ 157.41 Emergencies.

Sections 157.27, 157.29, 157.37, and157.39 do not apply to a tank vesselthat discharges into the sea oil or oilymixtures:

(a) For the purpose of securing thesafety of the vessel or for saving life atsea; or

(b) As a result of damage to the ves-sel or its equipment if:

(1) Reasonable precautions are takenafter the occurrence of the damage ordiscovery of the discharge for the pur-pose of preventing or minimizing thedischarge; and

(2) The owner, master or person incharge did not intend to cause damage,or did not act recklessly and withknowledge that damage of the environ-ment would probably result.

§ 157.43 Discharges of clean and seg-regated ballast: Seagoing tank ves-sels of 150 gross tons or more.

(a) Clean ballast may not be dis-charged overboard unless the dischargeis verified as clean ballast through useof an approved cargo monitor or, if dis-charged before the required cargo mon-itor installation date, by visual exam-ination of the ballast contents imme-diately before discharge. This para-graph applies to discharges of cleanballast:

(1) From dedicated clean ballasttanks; and

(2) Into the navigable waters of theUnited States from any other tank.

(b) Segregated ballast may not bedischarged overboard unless a visualexamination, or a test of the ballastcontents with an oil/water interface de-tector, immediately before the dis-charge shows that there is no oil mix-ture in the ballast. Use of a cargo mon-itor is not required. This paragraph ap-plies to discharges of segregated bal-last:

(1) Into the navigable waters of theUnited States; and

(2) Below the waterline at sea froman existing vessel that does not havean above the waterline discharge pointfor segregated ballast.

(c) All discharges of clean ballast andsegregated ballast must be through anabove waterline discharge point de-scribed in § 157.11(b)(2), except that:

(1) A vessel may discharge clean bal-last and segregated ballast below thewaterline when in port or at an off-shore terminal.

(2) A vessel may discharge clean bal-last and segregated ballast at sea bygravity below the waterline.

(3) An existing vessel that does nothave above waterline discharge pointsfor dedicated clean ballast tanks maydischarge clean ballast from thosetanks below the waterline at sea.

(4) An existing vessel that does nothave above waterline discharge pointsfor segregated ballast tanks may dis-charge segregated ballast below thewaterline at sea.

(d) This section applies only to sea-going tank vessels of 150 gross tons ormore.

[CGD 76–088b, 48 FR 45721, Oct. 6, 1983; 48 FR46985, Oct. 17, 1983]


454

33 CFR Ch. I (7–1–98 Edition)§ 157.45

§ 157.45 Valves in cargo or ballast pip-ing system.

When a tank vessel is at sea and thetanks contain oil, valves and closingdevices in the cargo or ballast pipingsystem or in the transfer system mustbe kept closed except they may beopened for cargo or ballast transfer totrim the vessel.

§ 157.47 Information for master.

A master or person in charge of anew vessel shall operate the vessel inaccordance with the information re-quired in 46 CFR 31.10–30(d) that in-cludes the following:

(a) Stability information.(b) Damage stability information de-

termined in accordance with the cri-teria contained in Appendix B of thispart.

(c) Loading and distribution of cargoinformation determined in compliancewith the damage stability criteria re-quired in Appendix B of this part.

[CGD 74–32, 40 FR 48283, Oct. 14, 1976, asamended by CGD 75–240, 41 FR 54180, Dec. 13,1976]

§ 157.49 Instruction manual.

The master of a tank vessel shall en-sure that the instruction manual under§ 157.23 is available and used when thecargo or ballast systems are operated.

Subpart D—Crude Oil Washing(COW) System on Tank Vessels

SOURCE: CGD 77–058b, 45 FR 43709, June 30,1980, unless otherwise noted.

GENERAL

§ 157.100 Plans for U.S. tank vessels:Submission.

(a) Before each U.S. tank vessel hav-ing a COW system under § 157.10(e),§ 157.10a(a)(2), or § 157.10c(b)(2) is in-spected under § 157.140, the owner or op-erator of that vessel must submit tothe Coast Guard plans that include—

(1) A drawing or diagram of the COWpumping and piping system that meets46 CFR 56.01–10(d);

(2) The design of each COW machine;(3) The arrangement, location, and

installation of the COW machines; and

(4) Except as allowed in § 157.104, theprojected direct impingement patternof crude oil from the nozzles of theCOW machines on the surfaces of eachtank, showing the surface areas notreached by direct impingement.

(b) Plans under paragraph (a) of thissection must be submitted to the Offi-cer in Charge, Marine Inspection, ofthe zone in which the COW system isinstalled or to the Commanding Offi-cer, U.S. Coast Guard Marine SafetyCenter, 400 7th Street, SW., Washing-ton, DC 20590–0001.


[CGD 77–058b, 45 FR 43709, June 30, 1980, asamended by CGD 82–28, 50 FR 11626 and 11630,Mar. 22, 1985; CDG 85–048a, 51 FR 15481, Apr.24, 1986; USCG–1998–3799, 63 FR 35531, June 30,1998]

§ 157.102 Plans for foreign tank ves-sels: Submission.

If the owner or operator of a foreigntank vessel having a COW systemunder § 157.10(e), § 157.10a(a)(2), or§ 157.10c(b)(2), desires the letter fromthe Coast Guard under § 157.106 accept-ing the plans submitted under thisparagraph, the owner or operator mustsubmit to the Commandant (G–MOC),U.S. Coast Guard, Washington, DC20593–0001, plans that include—

(a) A drawing or diagram of the COWpumping and piping system that meets46 CFR 56.01–10(d);

(b) The design of each COW machine;(c) The arrangement, location, and

installation of the COW machines; and(d) Except as allowed in § 157.104, the

projected direct impingement patternof crude oil from the nozzles of theCOW machines on the surfaces of eachtank, showing the surface areas notreached by direct impingement.


[CGD 77–058b, 45 FR 43709, June 30, 1980, asamended by CGD 82–28, 50 FR 11627 and 11630,Mar. 22, 1985; CGD 88–052, 53 FR 25122, July 1,1988; CGD 96–026, 61 FR 33668, June 28, 1996]

§ 157.104 Scale models.If the pattern under § 157.100(a)(4) or

§ 157.102(d) cannot be shown on a plan, a


455


scale model of each tank must be builtfor Coast Guard inspection to simulate,by a pinpoint of light, the projected di-rect impingement pattern on the sur-faces of the tank.

§ 157.106 Letter of acceptance.The Coast Guard informs the submit-

ter by letter that the plans submittedunder § 157.100 or § 157.102 are acceptedif:

(a) The plans submitted show thatthe COW system meets this subpart; or

(b) The plans submitted and the scalemodel under § 157.104 show that theCOW system meets this subpart.

§ 157.108 Crude Oil Washing Oper-ations and Equipment Manual forU.S. tank vessels: Submission.

Before each U.S. tank vessel having aCOW system under § 157.10(e),§ 157.10a(a)(2), or § 157.10c(b)(2) is in-spected under § 157.140, the owner or op-erator of that vessel must submit twocopies of a manual that meets § 157.138,to the Officer in Charge, Marine In-spection, of the zone in which the COWsystem is installed or to the appro-priate Coast Guard field technical of-fice listed in § 157.100(b).


[CGD 82–28, 50 FR 11627 and 11630, Mar. 22,1985]

§ 157.110 Crude Oil Washing Oper-ations and Equipment Manual forforeign tank vessels: Submission.

If the owner or operator of a foreigntank vessel having a COW systemunder § 157.10(e), § 157.10a(a)(2), or§ 157.10c(b)(2) desires a Coast Guard ap-proved Crude Oil Washing Operationsand Equipment Manual under § 157.112,the owner or operator must submit twocopies of a manual that meets § 157.138to the Commandant (G–MOC), U.S.Coast Guard, Washington, DC 20593–1000.


[CGD 82–28, 50 FR 11627 and 11630, Mar. 22,1985, as amended by CGD 88–052, 53 FR 25122,July 1, 1988; CGD 96–026, 61 FR 33668, June 28,1996]

§ 157.112 Approved Crude Oil WashingOperations and Equipment Manual.

If the manuals submitted under§ 157.108 or § 157.110 meet § 157.138, theCoast Guard approves the manuals andforwards one of the approved manualsto the submitter.

§ 157.114 Crude Oil Washing Oper-ations and Equipment Manual: Notapproved.

If the manuals submitted under§ 157.108 or § 157.110 are not approved,the Coast Guard forwards a letter tothe submitter with the reasons why themanuals were not approved.

§ 157.116 Required documents: U.S.tank vessels.

The owner, operator, and master of aU.S. tank vessel having a COW systemunder § 157.10(e), § 157.10a(a)(2), or§ 157.10c(b)(2) shall ensure that the ves-sel does not engage in a voyage unlessthe vessel has on board the following:

(a) The Crude Oil Washing Operationsand Equipment Manual that—

(1) Is approved under § 157.112; or(2) Bears a certification by an au-

thorized CS that the manual containsthe information required under§ 157.138.

(b) Evidence of acceptance of thetank vessel’s COW system consistingof—

(1) A document from an authorizedCS that certifies the vessel meets§ 157.10c(b)(2) and each amending letterby the authorized CS approvingchanges in the design, equipment, orinstallation; or

(2) The letter of acceptance under§ 157.106 and each amending letterissued under § 157.158(c).

(c) Evidence that the COW systempassed the required inspections by—

(1) A document from an authorizedCS that the vessel has passed the in-spections under § 157.140; or

(2) The letter of acceptance under§ 157.142 after passing the inspectionunder § 157.140.


[CGD 82–28, 50 FR 11627 and 11630, Mar. 22,1985]


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33 CFR Ch. I (7–1–98 Edition)§ 157.118

§ 157.118 Required documents: Foreigntank vessels.

(a) The owner, operator, and masterof a foreign tank vessel under § 157.10(e)or § 157.10a(a)(2) shall ensure that thevessel does not enter the navigable wa-ters of the United States or transfercargo at a port or place subject to thejurisdiction of the United States unlessthe vessel has on board—

(1) The Crude Oil Washing Operationsand Equipment Manual that—

(i) Is approved under § 157.112; or(ii) Meets the manual standards in

Resolution 15 of the MARPOL Protocoland bears the approval of the govern-ment of the vessel’s flag state; and

(2) Either—(i) A document from the government

of the vessel’s flag state that certifiesthat the vessel complies with Resolu-tion 15 of the MARPOL Protocol; or

(ii) The following letters issued bythe Coast Guard:

(A) The letter of acceptance issuedunder § 157.106.

(B) The letter of acceptance issuedunder § 157.142.

(C) Each amending letter issuedunder § 157.158(c).

(b) On January 1, 1986, or 15 yearsafter the date it was delivered to theoriginal owner or 15 years after thecompletion of a major conversion,whichever is later, the owner, operator,and master of a foreign vessel having aCOW system under § 157.10c(b)(2) shallensure that the vessel does not enterthe navigable waters of the UnitedStates or transfer cargo at a port orplace subject to the jurisdiction of theUnited States unless the vessel has onboard—

(1) The Crude Oil Washing Operationsand Equipment Manual that—

(i) Is approved under § 157.112; or(ii) Bears a certification by an au-

thorized CS or the government of thevessel’s flag state that the manual con-tains the information required under§ 157.138;

(2) Evidence that the COW systempassed the required inspections by—

(i) A document from an authorizedCS or the government of the vessel’sflag state certifying that the vesselpassed the inspections under § 157.140;or

(ii) The letter of acceptance under§ 157.142 after passing the inspectionunder § 157.140; and

(3) Either—(i) A document from an authorized

CS or the government of the vessel’sflag state certifying that the vesselcomplies with the design, equipmentand installation standards in §§ 157.122through 157.136 and any amending let-ters approving changed COW systemcharacteristics; or

(ii) The letter of acceptance under§ 157.106 and any amending lettersissued under § 157.158(c).


[CGD 82–28, 50 FR 11627 and 11630, Mar. 22,1985]

§ 157.120 Waiver of required docu-ments.

The Coast Guard waives the require-ment for the letter under § 157.116(b), ifa U.S. tank vessel engages in a voyage,or under § 157.118(b)(2)(ii), if a foreigntank vessel enters the navigable watersof the United States or transfers cargoat a port or place subject to the juris-diction of the United States, for thepurpose of being inspected under§ 157.140.

DESIGN, EQUIPMENT, AND INSTALLATION

§ 157.122 Piping, valves, and fittings.(a) Except as allowed in paragraph (o)

of this section, the piping, valves, andfittings of each COW system must:

(1) Meet 46 CFR Part 56; and(2) Be of steel or an equivalent mate-

rial accepted by the Commandant.(b) The piping of each COW system

must be permanently installed.(c) The piping of each COW system

must be separate from other pipingsystems on the vessel, except that thevessel’s cargo piping may be a part ofthe COW piping if the cargo pipingmeets this section.

(d) The piping of each COW systemmust have overpressure relief valves orother means accepted by the Com-mandant to prevent overpressure in thepiping of the COW system, unless themaximum allowable working pressureof that system is greater than the shut-


457


off head of each pump that meets§ 157.126(b).

(e) Each overpressure relief valvemust discharge into the suction side ofa pump that meets § 157.126(b).

(f) The piping and equipment of aCOW system may not be in machineryspaces.

(g) Each hydrant valve for waterwashing in the piping of a COW systemmust:

(1) Have adequate strength to meet 46CFR Part 56 for the working pressurefor which the system is designed; and

(2) Be capable of being blanked off.(h) Each sensing instrument must

have an isolating valve at its connec-tion to the piping of the COW system,unless the opening to that connectionis 0.055 inches (1.4 millimeters) orsmaller.

(i) If the washing system for cargotanks has a steam heater used whenwater washing, it must be located out-side the engine room and must be capa-ble of being isolated from the piping ofthe COW system by:

(1) At least two shut-off valves in theinlet piping and at least two shut-offvalves in the outlet piping; or

(2) Blank flanges identifiable as beingclosed (e.g., spectacle flanges).

(j) If the COW system has a commonpiping system for oil washing andwater washing, that piping systemmust be designed to drain the crude oilinto a slop tank or a cargo tank.

(k) The piping of a COW system mustbe securely attached to the tank ves-sel’s structure with pipe anchors.

(l) When COW machines are used aspipe anchors, there must be othermeans available for anchoring the pip-ing if these machines are removed.

(m) There must be a means to allowmovement of the COW system piping asa result of thermal expansion andflexing of the tank vessel.

(n) The supply piping attached toeach deck mounted COW machine andeach COW machine that is audio in-spected under § 157.155(a)(4)(ii) musthave a shut-off valve.

(o) On combination carriers, piping ofthe COW system installed between eachCOW machine located in a cargo tankhatch cover and an adjacent locationjust outside the hatch coaming, may be

flexible hose with flanged connectionsthat is acceptable by the Commandant.

§ 157.124 COW tank washing machines.

(a) COW machines must be perma-nently mounted in each cargo tank.

(b) The COW machines in each tankmust have sufficient nozzles with theproper diameter, working pressure,movement, and timing to allow thetank vessel to pass the inspectionsunder § 157.140.

(c) Each COW machine and its supplypiping must be supported to withstandvibration and pressure surges.

(d) There must be one portable driveunit available on board the vessel forevery three COW machines that useportable drive units during COW oper-ations required by § 157.160 before eachballast voyage.

(e) Except as allowed in paragraph (f)of this section, each cargo tank musthave COW machines located to wash allhorizontal and vertical areas of thetank by direct impingement, jet deflec-tion, or splashing to allow the tankvessel to pass the inspections under§ 157.140. The following areas in eachtank must not be shielded from directimpingement by large primary struc-tural members or any other structuralmember determined to be equivalent toa large primary structural member bythe Commandant when reviewing theplans submitted under § 157.100 or§ 157.102:

(1) 90 percent or more of the totalhorizontal area of the:

(i) Tank bottom;(ii) Upper surfaces of large primary

structural members; and(iii) Upper surfaces of any other

structural member determined to beequivalent to a large primary struc-tural member by the Commandant.

(2) 85 percent or more of the totalvertical area of the tank sides andswash bulkheads.

(f) Each cargo tank on a vessel hav-ing a COW system under § 157.10a(a)(2)or § 157.10c(b)(2) with complicated in-ternal structural members does nothave to meet paragraph (e) of this sec-tion if the following areas of eachcargo tank are washed by direct im-pingement and the tank vessel can passthe inspections under § 157.140:


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33 CFR Ch. I (7–1–98 Edition)§ 157.126

(1) 90 percent or more of the totalhorizontal area of all the:

(i) Tank bottoms;(ii) Upper surfaces of large primary

structural members; and(iii) Upper surfaces of any other

structural member determined to beequivalent to a large primary struc-tural member by the Commandant.

(2) 85 percent or more of the totalvertical area of all the tank sides andswash bulkheads.

(g) Each single nozzle COW machinethat is mounted to the deck must havea means located outside of the cargotank that indicates the arc and rota-tion of the movement of the COW ma-chine during COW operations.

(h) Each multi-nozzle COW machinethat is mounted to the deck must havea means located outside of the cargotank that indicates the movement ofthe COW machine during COW oper-ations.

(i) Each COW machine mounted to orclose to the bottom of a tank withouta means located outside of the cargotank that indicates movement of themachine must not be programmable.

NOTES: 1. In the calculations to meet§ 157.124 (e) or (f), areas that are shieldedfrom direct impingement by structural mem-bers other than large primary structuralmembers or swash bulkheads can be cal-culated as areas being washed by direct im-pingement.

2. One or more types of COW machinescould be used to meet § 157.124 (e) or (f).


§ 157.126 Pumps.

(a) Crude oil must be supplied to theCOW machines by COW system pumpsor cargo pumps.

(b) The pumps under paragraph (a) ofthis section must be designed and ar-ranged with sufficient capacity to meetthe following:

(1) A sufficient pressure and flow issupplied to allow the simultaneous op-eration of those COW machines de-signed to operate simultaneously.

(2) If an eductor is used for tankstripping, enough driving fluid is pro-vided by the pumps to allow the educ-tor to meet § 157.128(a).

(c) There must be means on the tankvessel to maintain the pressure underparagraph (b) of this section whenshore terminal back pressure is lessthan the pressure under paragraph (b)of this section.

(d) The COW system must have twoor more pumps that are capable of sup-plying oil to the COW machines.

(e) The COW system must be designedto meet the requirements of this sub-part with any one pump not operating.

§ 157.128 Stripping system.

(a) Each tank vessel having a COWsystem under § 157.10(e), § 157.10a(a)(2),or § 157.10c(b)(2) must have a strippingsystem that is designed to removecrude oil from—

(1) Each cargo tank at 1.25 times therate at which all the COW machinesthat are designed to simultaneouslywash the bottom of the tank, are oper-ating; and

(2) The bottom of each tank to allowthe tank vessel to pass the inspectionunder § 157.140(a)(2).

(b) Each cargo tank must be designedto allow the level of crude oil in thetank to be determined by:

(1) Hand dipping at the aftermostportion of the tank and three other lo-cations; or

(2) Any other means accepted by theCommandant.

(c) Each stripping system must haveat least one of the following devices forstripping oil from each cargo tank:

(1) A positive displacement pump.(2) A self-priming centrifugal pump.(3) An eductor(4) Any other device accepted by the

Commandant.(d) There must be a means in the

stripping system piping between thedevice under paragraph (c) of this sec-tion and each cargo tank to isolateeach tank from the device.

(e) If the stripping system has a posi-tive displacement pump or a self-priming centrifugal pump, the strip-ping system must have the following:

(1) In the stripping system piping:(i) A pressure gauge at the inlet con-

nection to the pump; and(ii) A pressure gauge at the discharge

connection to the pump.


459


(2) At least one of the following mon-itoring devices to indicate operation ofthe pump.

(i) Flow indicator.(ii) Stroke counter.(iii) Revolution counter.(f) If the stripping system has an

eductor, the stripping system musthave:

(1) A pressure gauge at each drivingfluid intake and at each discharge; and

(2) A pressure/vacuum gauge at eachsuction intake.

(g) The equipment required underparagraphs (e) and (f) of this sectionmust have indicating devices in thecargo control room or another locationthat is accepted by the Commandant.


§ 157.130 Crude oil washing with morethan one grade of crude oil.

If a tank vessel having a COW systemunder §§ 157.10(e), 157.10a(a)(2), or157.10c(b)(2) carries more than onegrade of crude oil, the COW systemmust be capable of washing the cargotanks with the grades of crude oil thatthe vessel carries.

[CGD 82–28, 50 FR 11627, Mar. 22, 1985]

§ 157.132 Cargo tanks: Hydrocarbonvapor emissions.

Each tank vessel having a COW sys-tem under § 157.10a(a)(2) or § 157.10c(b)(2)without sufficient segregated ballasttanks or dedicated clean ballast tanksto allow the vessel to depart from anyport in the United States withoutballasting cargo tanks must have—

(a) A means to discharge hydro-carbon vapors from each cargo tankthat is ballasted to a cargo tank that isdischarging crude oil; or

(b) Any other means accepted by theCommandant that prevents hydro-carbon vapor emissions when the cargotanks are ballasted in port.


§ 157.134 Cargo tank drainage.

Each cargo tank must be designed forlongitudinal and transverse drainage of

crude oil to allow the tank vessel topass the inspections under § 157.140.

§ 157.136 Two-way voice communica-tions.

Each tank vessel having a COW sys-tem under § 157.10(e), § 157.10a(a)(2), or§ 157.10c(b)(2) must have a means thatenables two-way voice communicationsbetween the main deck watch requiredunder § 157.168 and each cargo dischargecontrol station.

[CGD 82–28, 50 FR 11628, Mar. 22, 1985]

§ 157.138 Crude Oil Washing Oper-ations and Equipment Manual.

(a) Each Crude Oil Washing Operationsand Equipment Manual must includethe following information:

(1) The text of the Annex of Resolu-tion 15 of the MARPOL Protocol.

(2) A line drawing of the tank vessel’sCOW system showing the locations ofpumps, piping, and COW machines.

(3) A description of the COW system.(4) The procedure for the inspection

of the COW system during COW oper-ations.

(5) Design characteristic informationof the COW system that includes thefollowing:

(i) Pressure and flow of the crude oilpumped to the COW machines.

(ii) Revolutions, number of cycles,and length of cycles of each COW ma-chine.

(iii) Pressure and flow of the strip-ping suction device.

(iv) Number and location of COW ma-chines operating simultaneously ineach cargo tank.

(6) The design oxygen content of thegas or mixture of gases that is suppliedby the inert gas system to each cargotank.

(7) The results of the inspections re-corded when passing the inspectionsunder § 157.140.

(8) Characteristics of the COW sys-tem recorded during the COW oper-ations when passing the inspectionsunder § 157.140 that includes the follow-ing:

(i) Pressure and flow of the crude oilpumped to the COW machines.

(ii) Revolutions, number of cycles,and length of cycles of each COW ma-chine.


460

33 CFR Ch. I (7–1–98 Edition)§ 157.140

(iii) Pressure and flow of the strip-ping device.

(iv) Number and location of COW ma-chines operating simultaneously ineach cargo tank.

(9) The oxygen content of the gas ormixture of gases that is supplied by theinert gas system to each cargo tank re-corded during COW operations whenpassing the inspections under § 157.140.

(10) The volume of water used forwater rinsing recorded during COW op-erations when passing the inspectionsunder § 157.140.

(11) The trim conditions of the tankvessel recorded during COW operationswhen passing the inspections under§ 157.140.

(12) The procedure for stripping cargotanks of crude oil.

(13) The procedure for draining andstripping the pumps and piping of theCOW system, cargo system, and strip-ping system after each crude oil cargodischarge.

(14) The procedure for crude oil wash-ing cargo tanks that includes the fol-lowing:

(i) The tanks to be crude oil washedto meet § 157.160.

(ii) The order in which those tanksare washed.

(iii) The single-stage or multi-stagemethod of washing each tank.

(iv) The number of COW machinesthat operate simultaneously in eachtank.

(v) The duration of the crude oil washand water rinse.

(vi) The volume of water to be usedfor water rinse in each tank.

(15) The procedures and equipmentneeded to prevent leakage of crude oilfrom the COW system.

(16) The procedures and equipmentneeded if leakage of crude oil from theCOW system occurs.

(17) The procedures for testing andinspecting the COW system for leakageof crude oil before operating the sys-tem.

(18) The procedures and equipmentneeded to prevent leakage of crude oilfrom the steam heater under § 157.122(i)to the engine room.

(19) The number of crew membersneeded to conduct the following:

(i) The discharge of cargo.

(ii) The crude oil washing of cargotanks.

(iii) The simultaneous operations inparagraphs (a)(19) (i) and (ii) of thissection.

(20) A description of the duties ofeach crew member under paragraph(a)(19) of this section.

(21) The procedures for ballasting anddeballasting cargo tanks.

(22) The step by step procedure forthe inspection of the COW system byvessel personnel before COW operationsbegin that includes the procedure forinspecting and calibrating each instru-ment. (Operational Checklist)

(23) The intervals for on board inspec-tion and maintenance of the COWequipment. Informational references totechnical manuals supplied by themanufacturers may be included in thispart of the manual.

(24) A list of crude oils that are notto be used in COW operations.

(25) The procedure to meet§ 157.155(a)(4).

(b) In addition to meeting paragraph(a) of this section, each Crude Oil Wash-ing Operations and Equipment Manualon a tank vessel having a COW systemunder § 157.10a(a)(2) or § 157.10c(b)(2)must include the following:

(1) The procedure to meet § 157.166.(2) The procedures to meet

§ 157.155(b).


INSPECTIONS

§ 157.140 Tank vessel inspections.

(a) Before issuing a letter under§ 157.142, the Coast Guard makes an ini-tial inspection of each U.S. tank vesselhaving a COW system under § 157.10(e),§ 157.10(a)(2), or § 157.10c(b)(2) and eachforeign tank vessel whose owner or op-erator submitted the plans under§ 157.102 to determine whether or not,when entering a port, the cargo tanksthat carry crude oil meet the follow-ing:

(1) After each tank is crude oilwashed but not water rinsed, exceptthe bottom of the tank may be flushedwith water and stripped, each tank is


461


essentially free of oil clingage or de-posits of oil, or both to a degree accept-able to the Coast Guard inspector.

(2) After the tanks that are to beused as ballast tanks when leaving theport are crude oil washed and strippedbut not water rinsed or bottom flushed,they are filled with water and the totalvolume of crude oil floating on top ofthe water in these tanks is 0.085 per-cent or less of the total volume ofthese tanks.

(b) Except on a tank vessel under§ 157.10(e), if the initial inspectionunder paragraph (a) of this section hasbeen passed and the vessel arrives atthe first cargo loading port after com-pleting a ballast voyage, the CoastGuard monitors the discharge of efflu-ent from those tanks that have beencrude oil washed, water rinsed,stripped, and filled with ballast waterto determine whether or not the oilcontent of the effluent is 15 ppm orless.


§ 157.142 Letter of acceptance: Inspec-tions.

If the inspections under § 157.140 arepassed, the Coast Guard issues to thetank vessel a letter that states thatthe vessel complies with this subpart.

§ 157.144 Tank vessels of the sameclass: Inspections.

(a) If more than one tank vessel isconstructed from the same plans, theowner or operator may submit a writ-ten request to the Commandant (G–MOC), U.S. Coast Guard, Washington,D.C. 20593–0001, for only one of thosetank vessels to be inspected under§ 157.140.

(b) Only one tank vessel of the classis inspected under § 157.140, if the Com-mandant accepts the request submittedunder paragraph (a) of this section.

[CGD 77–058b, 45 FR 43709, June 30, 1980, asamended by CGD 82–28, 50 FR 11630, Mar. 22,1985; CGD 88–052, 53 FR 25122, July 1, 1988;CGD 96–026, 61 FR 33668, June 28, 1996]

§ 157.146 Similar tank design: Inspec-tions on U.S. tank vessels.

(a) If a U.S. tank vessel has tankssimilar in dimensions and internalstructure, the owner or operator maysubmit a written request to the Officerin Charge, Marine Inspection, of thezone in which the COW system is in-spected, for only one of those tanks tobe inspected under § 157.140(a)(1).

(b) Only one tank of a group of tankssimilar in dimensions and internalstructure is inspected under§ 157.140(a)(1), if the Officer in Charge,Marine Inspection, accepts the requestsubmitted under paragraph (a) of thissection.

§ 157.147 Similar tank design: Inspec-tions on foreign tank vessels.

(a) If a foreign tank vessel has tankssimilar in dimensions and internalstructure, the owner or operator maysubmit a written request to the Com-mandant (G–MOC), U.S. Coast Guard,Washington, D.C. 20593–0001, for onlyone of those tanks to be inspectedunder § 157.140(a)(1).

(b) Only one tank of a group of tankssimilar in dimensions and internalstructure is inspected under§ 157.140(a)(1), if the Commandant ac-cepts the request submitted underparagraph (a) of this section.


§ 157.148 COW system: Evidence for in-spections.

(a) Before the inspections under§ 157.140 are conducted by the CoastGuard, the owner or operator of a for-eign tank vessel that is to be inspectedmust submit to the Coast Guard in-spector evidence that the COW systemhas been installed in accordance withthe plans accepted under § 157.106.

(b) Before the inspections under§ 157.140 are conducted by the CoastGuard, the owner or operator of a tankvessel that is to be inspected must sub-mit to the Coast Guard inspector evi-dence that the COW piping system haspassed a test of 11⁄2 times the designworking pressure.


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33 CFR Ch. I (7–1–98 Edition)§ 157.150

§ 157.150 Crude Oil Washing Oper-ations and Equipment Manual: Re-cording information after inspec-tions.

After passing the inspections under§ 157.140, the owner, operator, and mas-ter shall ensure that the following arerecorded in the Crude Oil Washing Oper-ations and Equipment Manual approvedunder § 157.112:

(a) The results of the inspectionsunder § 157.140.

(b) The following characteristics usedto pass the inspections under § 157.140:

(1) Pressure and flow of the crude oilpumped to the COW machines.

(2) Revolutions, number of cycles,and length of cycles of each COW ma-chine.

(3) Pressure and flow of the strippingsuction device.

(4) Number and location of COW ma-chines operating simultaneously ineach cargo tank.

(5) Volume of water used for waterrinsing.

(6) Trim conditions of the tank ves-sel.

PERSONNEL

§ 157.152 Person in charge of COW op-erations.

The owner, operator, and master of atank vessel having a COW systemunder § 157.10(e), § 157.10(a)(2), or§ 157.10c(b)(2) shall ensure that the per-son designated as the person in chargeof COW operations—

(a) Knows the contents in the CrudeOil Washing Operations and EquipmentManual approved by the Coast Guardunder § 157.112 or by the government ofthe vessel’s flag state;

(b) On at least two occasions, hasparticipated in crude oil washing ofcargo tanks, one of those occasions oc-curring on:

(1) The tank vessel on which the per-son assumes duties as the person incharge of COW operations; or

(2) A tank vessel that is similar intank design and which has COW equip-ment similar to that used on the tankvessel on which the person assumes du-ties as the person in charge of COW op-erations; and

(c) Has one year or more of tank ves-sel duty that includes oil cargo dis-charge operations and:

(1) Crude oil washing of cargo tanks;or

(2) Has completed a training programin crude oil washing operations that isapproved by the Coast Guard or thegovernment of the vessel’s flag state.

NOTE: Standards of a Coast Guard approvedtraining program are to be developed.


§ 157.154 Assistant personnel.

The owner, operator, and master of atank vessel having a COW systemunder § 157.10(e), § 157.10a(a)(2), or§ 157.10c(b)(2) shall ensure that eachmember of the crew that has a des-ignated responsibility during COW op-erations—

(a) Has six months or more of tankvessel duty that includes oil cargo dis-charge operations;

(b) Has been instructed in the COWoperation of the tank vessel; and

(c) Is familiar with the contents ofthe Crude Oil Washing Operations andEquipment Manual approved by theCoast Guard under § 157.112 or by thegovernment of the vessel’s flag state.


COW OPERATIONS

§ 157.155 COW operations: General.

(a) The master of a tank vessel hav-ing a COW system under § 157.10(e),§ 157.10a(a)(2), or 157.10c(b)(2) shall en-sure that—

(1) Before crude oil washing a cargotank, the level in each tank with crudeoil that is used as a source for crude oilwashing is lowered at least one meter;

(2) A tank used as a slop tank is notused as a source for crude oil washinguntil:

(i) Its contents are discharged ashoreor to another tank; and

(ii) The tank contains only crude oil;(3) During COW operations:(i) The valves under § 157.122(i)(1) are

shut; or


463


(ii) The blanks under § 157.122(i)(2) areinstalled;

(4) The rotation of each COW ma-chine mounted to or close to the bot-tom of each cargo tank is verified by:

(i) A visual inspection of a means lo-cated outside of the cargo tank that in-dicates movement of the machine dur-ing COW operations;

(ii) An audio inspection during COWoperations; or

(iii) An inspection on a ballast voy-age, with water as the fluid flowingthrough the machine;

(5) During the audio inspection underparagraph (a)(4)(ii) of this section, theCOW machine being inspected is theonly one operating in that tank;

(6) Before the inspection under para-graph (a)(4)(iii) of this section, thetank that has the COW machine beinginspected in it, is gas freed;

(7) Each COW machine that is in-spected under paragraph (a)(4)(iii) ofthis section is inspected at least onceafter every sixth COW operation ofthat machine, but no less that onceevery 12 months;

(8) After each stripping operation iscompleted, each tank:

(i) Is sounded by a means under§ 157.128(b); and

(ii) Contains no oil except a minimalquantity near the stripping suction;

(9) Before the tank vessel begins eachballast voyage, each cargo tank andeach cargo main, stripping, and COWpiping is stripped of crude oil and thestrippings are conveyed ashore throughthe piping under §§ 157.11(d)(3) or157.11(e)(4);

(10) Before water washing the cargotanks, the piping of the COW system isdrained of crude oil;

(11) When the cargo tanks are notbeing water washed, the hydrant valvesunder § 157.122(g) are blanked off;

(12) If COW machines that are used asanchors for the piping of the COW sys-tem are removed, the means availableunder § 157.122(l) for anchoring the pip-ing are installed;

(13) The fire main is not connected tothe COW system; and

(14) On combination carriers, if flexi-ble hoses under § 157.122(o) are used,those hoses are protectively stowedwhen not installed in the COW pipingsystem.

(b) In addition to meeting paragraph(a) of this section, the master of a tankvessel having a COW system under§ 157.10a(a)(2) or § 157.10c(b)(2) shall en-sure that—

(1) Before ballasting cargo tanksupon leaving a port, each cargo pump,manifold, and piping that is used forballasting the cargo tanks is drained ofall crude oil; and

(2) Before ballasting or deballastingcargo tanks, except when ballastingcargo tanks to leave a port, the cargopiping that is used for ballasting ordeballasting the cargo tanks is waterwashed.


§ 157.156 COW operations: Meetingmanual requirements.

Except as allowed in § 157.158, themaster of a foreign tank vessel havinga COW system under §§ 157.10(e),157.10a(a)(2), or 157.10c(b)(2) that hasthe Crude Oil Washing Operations andEquipment Manual approved under§ 157.112 and is operating in the navi-gable waters of the United States ortransferring cargo at a port or placesubject to the jurisdiction of theUnited States and the master of a U.S.tank vessel having a COW systemunder § 157.10(e), § 157.10a(a)(2), or§ 157.10c(b)(2) shall ensure that duringeach COW operation—

(a) The procedures listed in the CrudeOil Washing Operations and EquipmentManual are followed; and

(b) The characteristics recorded inthe Crude Oil Washing Operations andEquipment Manual under § 157.150(b) aremet.


§ 157.158 COW operations: Changedcharacteristics.

The COW system may be operatedwith characteristics that do not meetthose recorded under § 157.150(b) only if:

(a) The tank vessel passes the inspec-tions under § 157.140 using the changedcharacteristics;

(b) The changed characteristics usedto pass the inspections under § 157.140are recorded in the Crude Oil Washing


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33 CFR Ch. I (7–1–98 Edition)§ 157.160

Operations and Equipment Manual ap-proved under § 157.112; and

(c) The Coast Guard issues to thetank vessel an amending letter statingthat the tank vessel complies with thissubpart with these characteristics.

§ 157.160 Tanks: Ballasting and crudeoil washing.

(a) The owner, operator, and masterof a tank vessel under § 157.10(e) shallensure that:

(1) Ballast water is carried in a cargotank only as allowed under § 157.35;

(2) For sludge control, at least 25 per-cent of the cargo tanks are crude oilwashed before each ballast voyage andthat each cargo tank is crude oilwashed at least once every fourth timecrude oil is discharged from the tank,but no tank need be crude oil washedmore than once during each 120 day pe-riod;

(3) Ballast water in a cargo tank thatis crude oil washed but not waterrinsed during or after the most recentdischarge of crude oil from that tank isdischarged in accordance with§ 157.37(a); and

(4) Cargo tanks are not crude oilwashed during a ballast voyage.

(b) The owner, operator, and masterof a tank vessel having a COW systemunder § 157.10a(a)(2) or § 157.10c(b)(2)shall ensure that—

(1) Ballast water is carried only in acargo tank that is crude oil washedduring or after the most recent dis-charge of crude oil from that tank;

(2) Before each ballast voyage a suffi-cient number of cargo tanks have beencrude oil washed during or after themost recent discharge of crude oil fromthose tanks to allow ballast water tobe carried in cargo tanks:

(i) With a total capacity to meet thedraft and trim requirements in§ 157.10a(d); and

(ii) For the vessel’s trading patternand expected weather conditions;

(3) For sludge control, at least 25 per-cent of the cargo tanks not used forcarrying ballast water under paragraph(b)(2)(i) of this section are crude oilwashed before each ballast voyage, andthat each cargo tank is crude oilwashed at least once every fourth timecrude oil is discharged from the tank,but no tank need be crude oil washed

more than once during each 120 day pe-riod;

(4) Cargo tanks are not crude oilwashed during a ballast voyage; and

(5) Ballast water in a cargo tank thatis crude oil washed but not waterrinsed during or after the most recentdischarge of crude oil from that tank isdischarged in accordance with§ 157.37(a).


§ 157.162 Crude oil washing during avoyage.

The master of a tank vessel having aCOW system under § 157.10(e),§ 157.10a(a)(2), or § 157.10c(b)(2) shall en-sure that each cargo tank that is crudeoil washed during a voyage other thana ballast voyage—

(a) Remains empty so that the tankmay be inspected upon arrival at thenext discharge port; and

(b) If it is to be used as a ballast tankwhen leaving the discharge port, isballasted before the vessel departsfrom that discharge port so that thetank may be inspected under§ 157.140(a)(2).


§ 157.164 Use of inert gas system.

(a) The master of a tank vessel hav-ing a COW system under § 157.10(e),§ 157.10a(a)(2), or § 157.10c(b)(2) shall en-sure the following:

(1) Before each cargo tank is crudeoil washed, the oxygen content in thetank is measured at each of the follow-ing locations in the tank:

(i) One meter from the deck.(ii) In the center of the ullage space.(2) Before each cargo tank with par-

tial bulkheads is crude oil washed, eacharea of that tank formed by each par-tial bulkhead is measured in accord-ance with paragraph (a)(1) of this sec-tion.

(3) Before each cargo tank is crudeoil washed, the oxygen content in thattank is 8 percent or less by volume atthe locations under paragraph (a)(1) ofthis section.


465


(4) During COW operations, the fol-lowing are maintained in each cargotank being crude oil washed:

(i) A gas or a mixture of gases withan oxygen content of 8 percent or lessby volume.

(ii) A positive atmospheric pressure.(5) During COW operations, a crew

member monitors the instrumentationunder 46 CFR 32.53–60(a)(1), except ifthat instrumentation has an alarmthat sounds in the cargo control roomwhen the oxygen content exceeds 8 per-cent by volume.

(b) Crude oil washing of the cargotanks must be terminated when para-graph (a)(4) of this section is not metand crude oil washing of that tank maynot be resumed until the requirementsof paragraph (a)(4) of this section aremet.


§ 157.166 Hydrocarbon emissions.

If the tank vessel having a COW sys-tem under § 157.10a(a)(2) or § 157.10c(b)(2)transfers cargo at a port in the UnitedStates that is in an area designated in40 CFR Part 81 as an area that does notmeet the national primary ambient airquality ozone standard under 40 CFRPart 50, issued under the Clean Air Act,as amended (42 U.S.C. 1857), the masterof the vessel shall ensure that whencargo tanks are ballasted in that portthe hydrocarbon vapors in each tankare contained by a means under§ 157.132.

NOTE: Questions relating to whether or nota particular port is located in an area des-ignated in 40 CFR Part 81 as an area thatdoes not meet the national primary ambientair quality standard under 40 CFR Part 50should be directed to the Plans Analysis Sec-tion of the Environmental Protection Agen-cy at (919) 541–5665.

[CGD 82–28, 50 FR 11628, Mar. 22, 1985]

§ 157.168 Crew member: Main deckwatch.

During COW operations, the mastershall ensure that at least one memberof the crew with a designated respon-sibility for monitoring COW operationsis on the main deck at all times.

§ 157.170 COW equipment: Removal.

(a) Whenever a deck mounted COWmachine is removed from the tank, themaster shall ensure that:

(1) The supply piping to that machineis blanked off; and

(2) The tank opening is sealed by asecured plate made of steel or an equiv-alent material accepted by the Com-mandant.

(b) If the equipment for the COW sys-tem is removed from a cargo tank forthe carriage of cargoes other thancrude oil and then reinstalled, the mas-ter shall ensure that, before COW oper-ations are conducted, the system hasno crude oil leakage.

§ 157.172 Limitations on grades ofcrude oil carried.

If a tank vessel having a COW systemmeeting § 157.10a(a)(2) or § 157.10c(b)(2)does not have segregated ballast tanksor dedicated clean ballast tanks thatmeet § 157.10c(c)(2), the owner, opera-tor, and master shall ensure that thevessel carries only the grades of crudeoil that can be used for crude oil wash-ing.

[CGD 82–28, 50 FR 11628, Mar. 22, 1985]

Subpart E—Dedicated CleanBallast Tanks on Tank Vessels

SOURCE: CGD 77–058b, 45 FR 43714, June 30,1980, unless otherwise noted.

GENERAL

§ 157.200 Plans for U.S. tank vessels:Submission.

(a) Before modifications are made toa U.S. vessel to meet § 157.10a(b),§ 157.10b(a)(2), § 157.10a(c)(2), or§ 157.10c(c)(2), the owner or operatormust submit to the Coast Guard plansor documents that include the follow-ing:

(1) The dedicated clean ballast tankarrangement.

(2) Documentation, calculations, orrevised stability information to showthat the vessel, with the addition ofthe dedicated clean ballast tanks,meets the stability standards for loadline assignment in 46 CFR Part 42.


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33 CFR Ch. I (7–1–98 Edition)§ 157.202

(3) Documentation, calculations, or aloading manual to show that the ves-sel, with the addition of the dedicatedclean ballast tanks, meets the struc-tural standards in 46 CFR Part 32.

(4) A drawing or diagram of thepumping and piping system for thededicated clean ballast tanks.

(b) Plans under paragraph (a) of thissection must be submitted to the Offi-cer in Charge, Marine Inspection, ofthe zone in which the dedicated cleanballast tank system is installed or tothe Commanding Officer, U.S. CoastGuard Marine Safety Center, 400 7thStreet, SW., Washington, DC 20590–0001.


[CGD 77–058b, 45 FR 43714, June 30, 1980, asamended by CGD 79–152, 45 FR 82250, Dec. 15,1980; CGD 82–28, 50 FR 11628, and 11630, Mar.22, 1985; CGD 85–048a, 51 FR 15481, Apr. 24,1986; USCG–1998–3799, 63 FR 35531, June 30,1998]

§ 157.202 Plans and documents for for-eign tank vessels: Submission.

The owner or operator of a foreigntank vessel under § 150.10a(b),§ 157.10a(c)(2), or § 157.10b(a)(2) who de-sires the letter from the Coast Guardunder § 157.204 accepting the plans sub-mitted under this paragraph, and theowner or operator of a foreign tankvessel under § 150.10c(c)(2) must submitto the Commandant (G–MOC), U.S.Coast Guard, Washington, D.C. 20593–0001—

(a) Plans that include:(1) The dedicated clean ballast tank

arrangement; and(2) A drawing or diagram of the

pumping and piping system for thededicated clean ballast tanks; and

(b) Documentation from the author-ity that assigned the load line to thetank vessel that states that the loca-tion of the dedicated clean ballasttanks is acceptable to that authority.


§ 157.204 Letter of acceptance.The Coast Guard informs the submit-

ter by letter that the plans submittedunder § 157.200 or the plans and docu-

ments submitted under § 157.202 are ac-cepted, if the plans submitted under§ 157.200 or the plans and documentssubmitted under § 157.202 show that thededicated clean ballast tank systemmeets this subpart.

§ 157.206 Dedicated Clean BallastTanks Operations Manual for U.S.tank vessels: Submission.

The owner or operator of a U.S. tankvessel meeting § 157.10a(b),§157.10a(c)(2), § 157.10b(a)(2), or§ 157.10c(c)(2) must submit two copies ofa manual that meets § 157.224 to the Of-ficer in Charge, Marine Inspection, ofthe zone in which the dedicated cleanballast tank system is installed or tothe appropriate Coast Guard field tech-nical office listed in § 157.200(b).


[CGD 82–28, 50 FR 11629, and 11630, Mar. 22,1985]

§ 157.208 Dedicated Clean BallastTanks Operations Manual for for-eign tank vessels: Submission.

If the owner or operator of a foreigntank vessel meeting § 157.10a(b),§ 157.10a(c)(2), § 157.10b(a)(2), or§ 157.10c(c)(2) desires a Coast Guard ap-proved Dedicated Clean Ballast TanksOperations Manual under § 157.210, theowner or operator must submit twocopies of a manual that meets § 157.224to the Commandant (G–MOC), U.S.Coast Guard, Washington, D.C. 20593–0001.


[CGD 82–28, 50 FR 11629, and 11630, Mar. 22,1985, as amended by CGD 88–052, 53 FR 25122,July 1, 1988; CGD 96–026, 61 FR 33668, June 28,1996]

§ 157.210 Approved Dedicated CleanBallast Tanks Operations Manual.

If the manuals submitted under§ 157.206 or § 157.208 meet § 157.224, theCoast Guard approves the manuals andforwards one of the approved manualsto the submitter.


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§ 157.212 Dedicated Clean BallastTanks Operations Manual: Not ap-proved.

If the Dedicated Clean Ballast TanksOperations Manual submitted under§ 157.206 or § 157.208 is not approved, theCoast Guard forwards a letter to thesubmitter with the reasons why themanual was not approved.

§ 157.214 Required documents: U.S.tank vessels.

The owner, operator, and master of aU.S. tank vessel meeting § 157.10a(b),§ 157.10a(c)(2), § 157.10b(a)(2), or§ 157.10c(c)(2) shall ensure that the ves-sel does not engage in a voyage unlessthe vessel has on board—

(a) The letter under § 157.204 accept-ing the dedicated clean ballast tanksystem plans;

(b) The Coast Guard approved Dedi-cated Clean Ballast Tanks OperationsManual under § 157.210; and

(c) Any amending letters issuedunder § 157.218 approving alterations.


[CGD 77–058b, 45 FR 43714, June 30, 1980, asamended by CGD 82–28, 50 FR 11629, and 11630,Mar. 22, 1985]

§ 157.216 Required documents: Foreigntank vessels.

(a) The owner, operator, and masterof a foreign tank vessel meeting§ 157.10a(b), § 157.10a(c)(2), § 157.10b(a)(2),or § 157.10c(c)(2) shall ensure that thevessel does not enter the navigable wa-ters of the United States or transfercargo at a port or place subject to thejurisdiction of the United States unlessthe vessel has on board—

(1) The Dedicated Clean Ballast TankOperations Manual that—

(i) Is approved under § 157.210; or(ii) Is certified by the government of

the vessel’s flag state because it meetsthe manual standards in Resolution 14of the MARPOL Protocol; and

(2) Either of the following:(i) A letter from the government of

the vessel’s flag state that certifiesthat the vessel complies with Resolu-tion 14 of the MARPOL Protocol.

(ii) The letter of acceptance under§ 157.204 and each amending letterissued under § 157.218(c).

(b) On January 1, 1986, or 15 yearsafter the date it was delivered to theoriginal owner or 15 years after thecompletion of a major conversion,whichever is later, the owner, operator,and master of a foreign tank vesselunder § 157.10c(c)(2) shall ensure thatthe vessel does not enter the navigablewaters of the United States or transfercargo at a port or place subject to thejurisdiction of the United States unlessthe vessel has on board—

(1) The Dedicated Clean Ballast TankOperations Manual that—

(i) Is approved under § 157.210; or(ii) Bears a certification by an au-

thorized CS or the government of thevessel’s flag state that the manualmeets § 157.224; and

(2) Either of the following:(i) A letter from an authorized CS or

the government of the vessel’s flagstate certifying the vessel complieswith §§ 157.220 and 157.222, and anyamending letters issued approviding al-terations.

(ii) The letter of acceptance under§ 157.204 and each amending letterissued under § 157.218.


[CGD 82–28, 50 FR 11629, and 11630, Mar. 22,1985]

§ 157.218 Dedicated clean ballasttanks: Alterations.

The dedicated clean ballast tanks orequipment on a tank vessel that has aletter issued under § 157.204 may not bealtered so that they no longer meet theplans accepted under that section un-less:

(a) The owner or operator of that ves-sel submits plans that show the alter-ations to the Coast Guard official towhich the plans were submitted under§ 157.200 or § 157.202;

(b) The owner or operator of that ves-sel submits changes to the manualunder § 157.224 that show and describethe alterations to the Coast Guard offi-cial to which the manuals were submit-ted under § 157.206 or § 157.208; and


468

33 CFR Ch. I (7–1–98 Edition)§ 157.220

(c) The Coast Guard issues to thetank vessel an amending letter statingthat the vessel, as altered, complieswith this subpart.

DESIGN AND EQUIPMENT

§ 157.220 Dedicated clean ballasttanks: Standards.

(a) Cargo tanks that are designatedas dedicated clean ballast tanks mustallow the tank vessel to meet the draftand trim requirements under§§ 157.10a(d) and 157.10b(b).

(b) Each tank under paragraph (a) ofthis section must be:

(1) A wing tank; or(2) Any other tank that is accepted

by the Commandant.

[CGD 77–058b, 45 FR 43714, June 30, 1980, asamended by CGD 79–152, 45 FR 82250, Dec. 15,1980]

§ 157.222 Pump and piping arrange-ments.

(a) Dedicated clean ballast tanksmust be connected to the least prac-ticable:

(1) Number of pumps; and(2) Amount of piping.(b) Each piping system that is ar-

ranged to convey clean ballast andcargo must be designed to be flushed tothe slop tank with water.

(c) The piping system of each dedi-cated clean ballast tank must be ar-ranged so that oily water does notenter any dedicated clean ballast tankwhen the piping system is flushed.

(d) The piping system of each dedi-cated clean ballast tank must have atleast two valves that isolate that tankfrom each cargo tank.

(e) The piping system of the dedi-cated clean ballast tanks must have asample point that is located in a verti-cal section of discharge piping.

NOTE: An example of a sample point isshown in 46 CFR Figure 162.050–17(e).

§ 157.224 Dedicated Clean BallastTanks Operations Manual.

Each Dedicated Clean Ballast TanksOperations Manual must include thefollowing information:

(a) The text of the Annex of Resolu-tion 14 of the MARPOL Protocol.

(b) A description of the dedicatedclean ballast tanks system.

(c) A procedure for dedicated cleanballast tanks operations.

NOTE: Appendix D is an example of such aprocedure.

DEDICATED CLEAN BALLAST TANKSOPERATIONS

§ 157.225 Dedicated clean ballast tanksoperations: General.

The master of a tank vessel meeting§ 157.10a(b), § 157.10a(c)(2), § 157.10b(a)(2),or § 157.10c(c)(2) shall ensure that—

(a) Before clean ballast in any dedi-cated clean ballast tank is dischargedor transferred, the pump and pipingsystem for conveying the clean ballastare flushed with water;

(b) Before any dedicated clean ballasttank is ballasted, the pump and pipingsystem for conveying the ballast areflushed with water;

(c) Before the pump and piping sys-tem of the dedicated clean ballasttanks are used for cargo transfer:

(1) If water in the dedicated cleanballast tanks is used for flushing thepump and piping system, the volume ofwater for flushing is equal to at least10 times the volume of the piping to beflushed;

(2) The piping system is drained offluid; and

(3) The valves under § 157.222(d) areclosed;

(d) Flushing water is pumped from asea chest or a dedicated clean ballasttank through the pump and piping sys-tem of the dedicated clean ballasttanks and then to a slop tank;

(e) Clean ballast from each dedicatedclean ballast tank is discharged in ac-cordance with § 157.43;

(f) When the pump and piping systemare being flushed:

(1) The oil content of the flushingwater in the piping system is mon-itored; and

(2) The pump and piping system areflushed until the oil content of theflushing water in the piping stabilizes;and

(g) If any pump or piping system thatis flushed to meet paragraph (f) of thissection is used to convey cargo duringan emergency, that pump or piping sys-tem is flushed again to meet paragraph


469


(f) of this section before being used toconvey clean ballast.


§ 157.226 Dedicated Clean BallastTanks Operations Manual: Proce-dures to be followed.

The master of a foreign tank vesselmeeting § 157.10a(b), § 157.10a(c)(2),§ 157.10b(a)(2), or § 157.10c(c)(2) that hasthe Dedicated Clean Ballast Tanks Oper-ations Manual approved under § 157.210and is operating in the navigable wa-ters of the United States or transfer-ring cargo at a port or place subject tothe jurisdiction of the United Statesand the master of a U.S. tank vesselmeeting § 157.10a(b), § 157.10a(c)(2),§ 157.10b(a), or § 157.10c(c)(1) shall ensurethat the procedure listed in the Dedi-cated Clean Ballast Tanks OperationsManual are followed.

[CGD 82–28, 50 FR 11629, Mar. 22, 1985]

§ 157.228 Isolating Valves: Closed dur-ing a voyage.

(a) The master of each U.S. tank ves-sel under § 157.10a(b), § 157.10a(c)(2),§ 157.10b(a)(2), or § 157.10c(c)(2) shall en-sure that the valves under § 157.222(d)remain closed during each voyage.

(b) The master of each foreign tankvessel meeting § 157.10a(b),§ 157.10a(c)(2), § 157.10b(a)(2), or§ 157.10c(c)(2) shall ensure that thevalves under § 157.222(d) remain closedwhen the vessel is on a voyage in thenavigable waters of the United States.

[CGD 82–28, 50 FR 11629, Mar. 22, 1985]

Subpart F—Exemption From§ 157.10a or § 157.10c

SOURCE: CGD 79–126, 46 FR 3513, Jan. 15,1981, unless otherwise noted.

§ 157.300 Qualifications for exemptionsunder this part.

(a) Each vessel under § 157.10a or§ 157.10c of this part may qualify for anexemption from the requirements of§ 157.10a or § 157.10c of this part if—

(1) The vessel loads and dischargescargo only at ports or places within theUnited States, its territories, or itspossessions; and

(2) The application for exemptionmeets § 157.302.

(b) Except where the owner can showgood cause, a vessel is not granted anexemption under this subpart if a pre-vious exemption for the vessel has beenrevoked by the Coast Guard under§ 157.308(a)(1) or § 157.308 (a)(2).

[CGD 79–126, 46 FR 3513, Jan. 15, 1981, asamended by CGD 82–28, 50 FR 11630, Mar. 22,1985]

§ 157.302 Applying for an exemption orrequesting modification of an ex-emption.

(a) Each application for an exemp-tion or modification must be in writingand submitted to the Commandant (G–MOC), U.S. Coast Guard, Washington,D.C. 20593–0001.

(b) Each application for exemptionmust include the following: (1) Thename and official number of the vesselfor which the exemption is requested.

(2) A list of each port or place wherethe vessel would load cargo.

(3) The name, address, and telephonenumber for each shore-based receptionfacility at each port listed under para-graph (b)(2) of this section where thevessel would discharge its ballast waterand cargo residues, including:

(i) The name or title of the person ateach facility who should be contactedfor information concerning the oper-ation of the reception facility; and

(ii) A statement from the facilityowner disclosing whether or not, basedon current operating conditions, the fa-cility has the capability of processingthe anticipated volume and type of dis-charges from the vessel without ad-versely affecting the service of the fa-cility to current users.

(4) The number of the permit underthe National Pollutant DischargeElimination System (NPDES permit)issued to each listed shore-based recep-tion facility.

(5) A list of each type of oil cargothat the vessel would load.

(6) A description of the method bywhich the vessel would discharge bal-last water and cargo residues to eachlisted shore based reception facility.

(c) Each request for modification toan exemption must include the follow-ing:


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33 CFR Ch. I (7–1–98 Edition)§ 157.304

(1) The name and official number ofthe vessel for which the modificationto the exemption is requested.

(2) The reason for requesting modi-fication of the exemption.

(3) Any additional information whichis pertinent to the modification.

[CGD 79–126, 46 FR 3513, Jan. 15, 1981, asamended by CGD 82–28, 50 FR 11630, Mar. 22,1985; CGD 88–052, 53 FR 25122, July 1, 1988;CGD 96–026, 61 FR 33668, June 28, 1996]

§ 157.304 Shore-based reception facil-ity: standards.

No shore-based reception facilitymay be listed to meet § 157.302(b)(3) un-less that reception facility has:

(a) A valid NPDES permit which al-lows it to process the ballast water andcargo residues of the vessel for whichthe exemption is being requested; and

(b) The capacity to receive and storea volume of dirty ballast water equiva-lent to 30 percent of the deadweight,less the segregated ballast volume, ofthe vessel for which the exemption isbeing requested.

§ 157.306 Granting, denying, or modify-ing an exemption.

(a) The Assistant Commandant forMarine Safety and Environmental Pro-tection issues a written decision con-cerning the grant or denial of each ex-emption or modification requestedunder § 157.302.

(b) If the exemption or request formodification is denied, the decisionunder paragraph (a) of this section in-cludes the reasons for the denial.

(c) Any person directly affected by,and not satisfied with, a decision madeunder paragraph (a) of this section mayappeal that decision, in writing, to theCommandant (G–MOC), U.S CoastGuard, Washington, DC 20593–0001. Theappeal may contain any supportingdocumentation or evidence that the ap-pellant wishes to have considered.

(d) The Commandant, U.S. CoastGuard issues a ruling after reviewingthe appeal submitted under paragraph(c) of this section. This ruling is finalagency action.

[CGD 79–126,46 FR 3513, Jan. 15, 1981, asamended by CGD 88–052, 53 FR 25122, July 1,1988; CGD 96–026, 61 FR 33668, June 28, 1996;CGD 97–023, 62 FR 33364, June 19, 1997]

§ 157.308 Revocation of exemption:procedure and appeals.

(a) The Officer in Charge, Marine In-spection may consider the revocationof the exemption granted under thissubpart when:

(1) Requested by the vessel’s owner;(2) There is evidence that the vessel’s

owner, operator, or master has failedto comply with the requirements ofthis subpart; or

(3) There have been changes to theNPDES permit of a reception facilitylisted to meet § 157.304(b)(3) that wouldadversely affect the ability of that fa-cility to process the vessel’s dis-charges.

(b) The Officer in Charge, Marine In-spection, of the zone in which an occur-rence under paragraph (a)(2) or (a)(3) ofthis section takes place notifies theowner, operator, and master of the ex-empted vessel of the specific reasonsfor considering the revocation of theexemption.

(c) Evidence or arguments for the re-tention of the exemption that are sub-mitted to the Officer in Charge, MarineInspection within thirty days of receiptof the notice under paragraph (b) ofthis section will be considered before aruling is made.

(d) If the owner is not satisfied withthe ruling made under this section bythe Officer in Charge, Marine Inspec-tion, that ruling may be appealedunder the procedure in § 157.06 of thispart.

§ 157.310 Exempted vessels: oper-ations.

The owner, operator, and master ofeach vessel that has been granted anexemption under this subpart must en-sure that:

(a) The vessel trades only betweenports or places within the UnitedStates, its territories or possessions;

(b) The vessel loads cargo only atports or places listed in the exemption;

(c) Except as allowed under § 157.41 (a)and (b) of this part, any ballast water,except segregated ballast discharged inaccordance with § 157.43(b) of this part,and any tank washing or cargo residuesare:

(1) Retained on board; or


471


(2) Transferred to a shore-based re-ception facility that is listed in the ap-plication for exemption, or in the caseof an emergency or a shipyard entry,an alternative acceptable to the cog-nizant Officer in Charge, Marine In-spection;

(d) The vessel loads only those car-goes listed in the exemption; and

(e) The letter under § 157.306 thatgrants the exemption is on board thevessel; or

(f) The certificate of inspection bear-ing the following endorsement is onboard the vessel:

Exempted under 33 CFR 157.306 fromthe requirements of (33 CFR 157.10a or157.10c, whichever is appropriate, will beinserted). This vessel may not dischargecargo in any foreign port, nor may itload cargo in a port other than the fol-lowing: (a list of ports contained in theapplication that is accepted by the CoastGuard for the exempted vessel will be in-serted here).

[CGD 79–126, 46 FR 3513, Jan. 15, 1981, asamended by CGD 82–28, 50 FR 11630, Mar. 22,1985]

Subpart G—Interim Measures forCertain Tank Vessels WithoutDouble Hulls Carrying Petro-leum Oils

SOURCE: CGD 91–045, 59 FR 40188, Aug. 5,1994, unless otherwise noted.

§ 157.400 Purpose and applicability.

(a) The purpose of this subpart is toestablish mandatory safety and oper-ational requirements to reduce envi-ronmental damage resulting from pe-troleum oil spills.

(b) This subpart applies to each tankvessel specified in § 157.01 of this partthat—

(1) Is 5,000 gross tons or more;(2) Carries petroleum oil in bulk as

cargo or cargo residue; and(3) Is not equipped with a double hull

meeting § 157.10d of this part, or anequivalent to the requirements of§ 157.10d, but required to be equippedwith a double hull at a date set forth in46 U.S.C. 3703a (b)(3) and (c)(3).

[CGD 91–045, 61 FR 39788, July 30, 1996]

§ 157.410 Emergency lightering re-quirements for oil tankers.

Each oil tanker, to which this sub-part applies, shall carry the equipmentlisted in paragraphs (a), (b), and (c) ofthis section. This equipment shall belocated on the main deck, in the cargocontrol room, in the pump room, or inthe forecastle locker. This equipmentmust be protected from the weatherand must be stored in one separate andmarked location which is as convenientto the cargo manifold, as is prac-ticable.

(a) Reducers, adapters, bolts, wash-ers, nuts, and gaskets to allow at leasttwo simultaneous transfer connectionsto be made from the vessel’s cargomanifold to 15-centimeter (6-inch), 20-centimeter (8-inch), and 25-centimeter(10-inch) cargo hoses. All reducers mustbe permanently marked with sizes.

(b) One extra set of adapters, bolts,washers, nuts, and gaskets per reducerset must be carried as spares.

(c) Reducers, bolts, and gaskets mustmeet the requirements of 46 CFR 56.25.Cast iron and malleable iron must notbe used.

[CGD 91–045, 59 FR 40188, Aug. 5, 1994, asamended by CGD 91–045, 61 FR 39789, July 30,1996; USCG–1998–3799, 63 FR 35531, June 30,1998]

§ 157.415 Bridge resource managementpolicy and procedures.

(a) Not later than February 1, 1997, atankship owner or operator shall pro-vide written policy and procedures tomasters and officers in charge of thenavigational watch concerning theneed for continuously reassessing howbridge-watch resources are being allo-cated and used, based on bridge re-source management principles. Thiswritten policy and procedures must in-clude vessel and crew specific examplesthat address the following:

(1) The number of qualified individ-uals that should be on watch to ensurethat all duties can be performed effec-tively.

(2) The appropriate qualifications ofall members of the navigational watch,the importance of confirming that allmembers of the watch are fit for duty,and the need to ensure that all mem-bers of the navigational watch are notimpaired by fatigue.


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33 CFR Ch. I (7–1–98 Edition)§ 157.420

(3) The need to take into account anyknown limitation in qualifications orfitness of individuals when makingnavigational and operational decisions.

(4) The need to be clear and unambig-uous in assigning duties and the needto establish that the individual under-stands his or her responsibilities.

(5) The need to perform tasks in aclear order of priority and to adjust thepriority of tasks as circumstances mayrequire.

(6) The importance of assigning andreassigning members of the watch tolocations where they can perform theirduties most effectively.

(7) Conditions that warrant task re-assignment among members of thewatch.

(8) The instruments and equipmentnecessary for the effective performanceof each task and appropriate actions ifthe instruments and equipment are notavailable or not functioning properly.

(9) The need for, and examples of,clear, immediate, reliable, and relevantcommunication among members of thenavigational watch.

(10) The action to be taken to sup-press, remove, and avoid nonessentialactivity and distractions on the bridge.

(11) The importance of collecting,processing, and interpreting all essen-tial information and making it conven-iently available to other members ofthe navigational watch and the pilot,as necessary to perform their duties.

(12) The need to ensure that non-essential materials are not placed onthe bridge.

(13) The need to ensure that membersof the navigational watch are preparedto respond at all times efficiently andeffectively to changes in cir-cumstances.

(b) Beginning not later than Feb-ruary 1, 1997, a tank barge owner or op-erator shall not permit the barge to betowed unless those individuals assignedto duties that are similar to the dutiesof the officer in charge of a naviga-tional watch on the primary towingvessel have been provided writtenbridge resource management policyand procedures as specified in para-graph (a) of this section.

[CGD 91–045, 61 FR 39789, July 30, 1996]

§ 157.420 Vessel specific watch policyand procedures.

(a) Not later than February 1, 1997,the owner or operator of a tankshipshall provide written policy and proce-dures to masters concerning the needfor each individual who is newly em-ployed on board the vessel to have areasonable opportunity to become fa-miliar with the shipboard equipment,operating procedures, and other ar-rangements needed for the proper per-formance of their duties, before beingassigned to such duties. This writtenpolicy and procedures shall be followedby the master and shall include the fol-lowing:

(1) Allocation of a reasonable and ap-propriate time period for each newlyemployed individual to allow him orher the opportunity to become ac-quainted with the following:

(i) The specific equipment the indi-vidual will be using or operating; and

(ii) The vessel specific watchkeeping,safety, environmental protection, andemergency procedures and arrange-ments the individual needs to know toperform the assigned duties properly.

(2) Designation of a knowledgeablecrew member who will be responsiblefor ensuring that an opportunity is pro-vided to each newly employed individ-ual to receive essential information ina language the individual understands.

(b) Beginning not later than Feb-ruary 1, 1997, a tank barge owner or op-erator shall not permit the barge to betowed unless those individuals assignedto duties as master or operator on theprimary towing vessel have been pro-vided written policy and procedures asspecified in paragraph (a) of this sec-tion.

[CGD 91–045, 61 FR 39789, July 30, 1996]

§ 157.430 Enhanced survey require-ments.

Beginning at each tank vessel’s nextregularly scheduled drydock examina-tion and continuing as required under46 CFR part 31, or, for each foreignflagged tank vessel, beginning at thenext drydock and continuing as re-quired under the foreign vessel’s flagadministration, a tank vessel owner oroperator shall—


473


(a) Implement an enhanced surveyprogram that complies with the stand-ards of IMO Resolution A.744(18),Annex B sections 1.1.3–1.1.4, 1.2–1.3, 2.1,2.3–2.6, 3–8, and Annexes 1–10 with ap-pendices;

(b) Implement a vessel specific sur-vey program that provides a level ofprotection equivalent to the require-ments in paragraph (a)(1) of this sec-tion and is approved by the Com-mandant (G–MOC). A written requestfor program equivalency under thisparagraph must be submitted to theCommandant (G–MOC); or

(c) For a tankship of less than 20,000deadweight tons (dwt) carrying crudeoil, a tankship of less than 30,000 dwtcarrying product, or a tank barge, im-plement an enhanced survey programthat—

(1) Includes oversight of the programby the Coast Guard, the vessel’s flagadministration, an authorized classi-fication society as described in § 157.04of this part, or a licensed professionalengineer;

(2) Has the frequency of survey whichis no less than the inspections requiredby 46 CFR subpart 31.10;

(3) Has survey scope and record-keeping requirements that are com-parable to the requirements of para-graph (a)(1) of this section; and

(4) Includes keeping a copy of themost recent survey on board the vesselor, upon request by the Coast Guard,making the surveys available within 24hours for examination.

[CGD 91–045, 61 FR 39789, July 30, 1996]

§ 157.435 Vital systems surveys.(a) A tank vessel owner or operator

shall ensure that surveys of the follow-ing systems are conducted:

(1) Cargo systems. The survey must in-clude the examination and testing ofthe items listed in chapters 6, 7, and 10of the International Safety Guide forOil Tankers and Terminals, if applica-ble, prior to cargo transfer operations.

(2) Mooring systems. The survey mustinclude a visual examination of theemergency towline, the anchor releas-ing mechanism, and mooring linesprior to entering the port or place ofdestination, if weather permits, orprior to getting underway.

(b) Surveys must be conducted bycompany management personnel, com-pany designated individuals, or vesselofficers knowledgeable about theequipment operating parameters andhaving the authority, capability, andresponsibility to initiate corrective ac-tion when the equipment is not func-tioning properly.

(c) The results of the survey requiredin paragraph (a) of this section, includ-ing the material condition of each sys-tem, must be recorded in the tank ves-sel’s deck log or other onboard docu-mentation.

[CGD 91–045, 61 FR 39789, July 30, 1996; 61 FR41685, Aug. 9, 1996]

§ 157.440 Autopilot alarm or indicator.(a) A tankship owner or operator

shall ensure that each installed auto-pilot unit without automatic manualoverride has an audible and visualalarm, which is distinct from other re-quired bridge alarms, that will activateif the helm is manually moved whilethe autopilot is engaged.

(b) A tank barge owner or operatorshall ensure that each autopilot unitwithout automatic manual override in-stalled on the primary towing vesselhas a means to clearly indicate theautopilot status and warns personnel ofthe requirement to disengage the auto-pilot if positive rudder control is need-ed.

[CGD 91–045, 61 FR 39790, July 30, 1996]

§ 157.445 Maneuvering performancecapability.

(a) A tankship owner or operatorshall ensure that maneuvering tests inaccordance with IMO ResolutionA.751(18), sections 1.2, 2.3–2.4, 3–4.2, and5 (with Explanatory Notes in MSC/Circ.644) have been conducted by July29, 1997. Completion of maneuveringperformance tests must be shown by—

(1) For a foreign flag tankship, a let-ter from the flag administration or anauthorized classification society, as de-scribed in § 157.04 of this part, statingthe requirements in paragraph (a) ofthis section have been met; or

(2) For a U.S. flag tankship, resultsfrom the vessel owner confirming thecompletion of the tests or a letter froman authorized classification society, as


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33 CFR Ch. I (7–1–98 Edition)§ 157.450

described in § 157.04 of this part, statingthe requirements in paragraph (a) ofthis section have been met.

(b) If a tankship undergoes a majorconversion or alteration affecting thecontrol systems, control surfaces, pro-pulsion system, or other areas whichmay be expected to alter maneuveringperformance, the tankship owner or op-erator shall ensure that new maneuver-ing tests are conducted as required byparagraph (a) of this section.

(c) If a tankship is one of a class ofvessels with identical propulsion, steer-ing, hydrodynamic, and other relevantdesign characteristics, maneuveringperformance test results for any tank-ship in the class may be used to satisfythe requirements of paragraph (a) ofthis section.

(d) The tankship owner or operatorshall ensure that the performance testresults, recorded in the format of Ap-pendix 6 of the Explanatory Notes inMSC/Circ.644, are prominently dis-played in the wheelhouse.

(e) Prior to entering the port or placeof destination and prior to getting un-derway, the tankship master shall dis-cuss the results of the performancetests with the pilot while reviewing theanticipated transit and the possible im-pact of the tankship’s maneuvering ca-pability on the transit.

[CGD 91–045, 61 FR 39790, July 30, 1996; 61 FR41685, Aug. 9, 1996]

§ 157.450 Maneuvering and vessel sta-tus information.

A tankship owner, master, or opera-tor shall comply with IMO ResolutionA.601(15), Annex sections 1.1, 2.3, 3.1,and 3.2, with appendices.

[CGD 91–045, 61 FR 39790, July 30, 1996]

§ 157.455 Minimum under-keel clear-ance.

(a) The owner or operator of a tank-ship, that is not fitted with a doublebottom that covers the entire cargotank length, shall provide the tankshipmaster with written under-keel clear-ance guidance that includes—

(1) Factors to consider when calculat-ing the ship’s deepest navigationaldraft;

(2) Factors to consider when calculat-ing the anticipated controlling depth;

(3) Consideration of weather or envi-ronmental conditions; and

(4) Conditions which mandate whenthe tankship owner or operator shall becontacted prior to port entry or get-ting underway; if no such conditionsexist, the guidance must contain astatement to that effect.

(b) Prior to entering the port or placeof destination and prior to getting un-derway, the master of a tankship thatis not fitted with the double bottomthat covers the entire cargo tanklength shall plan the ship’s passageusing guidance issued under paragraph(a) of this section and estimate the an-ticipated under-keel clearance. Thetankship master and the pilot shall dis-cuss the ship’s planned transit includ-ing the anticipated under-keel clear-ance. An entry must be made in thetankship’s official log or in other on-board documentation reflecting discus-sion of the ship’s anticipated passage.

(c) The owner or operator of a tankbarge, that is not fitted with a doublebottom that covers the entire cargotank length, shall not permit the bargeto be towed unless the primary towingvessel master or operator has been pro-vided with written under-keel clear-ance guidance that includes—

(1) Factors to consider when calculat-ing the tank barge’s deepest naviga-tional draft;

(2) Factors to consider when calculat-ing the anticipated controlling depth;

(3) Consideration of weather or envi-ronmental conditions; and

(4) Conditions which mandate whenthe tank barge owner or operator shallbe contacted prior to port entry or get-ting underway; if no such conditionsexist, the guidance must contain astatement to that effect.

[CGD 91–045, 62 FR 49608, Sept. 23, 1997]

§ 157.460 Additional operational re-quirements for tank barges.

(a) Emergency steering capability. Theowner or operator of each tank bargeshall not permit the barge to be towedunless, by November 27, 1997, the pri-mary towing vessel has—

(1) A steering gear system with amain power unit, an alternative powerunit, and two remote steering gear con-trol systems, except that separatesteering wheels or steering levers are


475

Coast Guard, DOT Pt. 157, App. A

not required. The steering gear controlsystems must be arranged so that ifthe system in operation fails, the othersystem can be brought into immediateoperation from a position on the navi-gating bridge; or

(2) Twin screw propulsion with sepa-rate control systems for each propeller.

(b) Fendering system. An owner or op-erator of a tank barge shall not permitthe barge to be towed unless the pri-mary towing vessel and any fleeting orassist towing vessels have a fenderingsystem that is of substantial size andcomposition to prevent metal to metalcontact between the towing vessel andthe barge during maneuvering oper-ations.

[CGD 91–045, 61 FR 39790, July 30, 1996; 61 FR41685, Aug. 9, 1996]

Subpart H—Interim Measures forCertain Tank Vessels WithoutDouble Hulls Carrying AnimalFat or Vegetable Oil

SOURCE; CGD 91–045, 61 FR 39791, July 30,1996, unless otherwise noted.


(a) The purpose of this subpart is toestablish mandatory safety and oper-ational requirements to reduce envi-ronmental damage resulting from thedischarge of animal fat or vegetableoil.


(1) Is 5,000 gross tons or more;(2) Carries animal fat or vegetable oil

in bulk as cargo or cargo residue; and(3) Is not equipped with a double hull


§ 157.510 Operational measures.

An owner or operator of a tank vesselthat carries animal fat or vegetable oilin bulk as cargo or cargo residue shallcomply with the requirements in allsections of subpart G of this part.

Subpart I—Interim Measures forCertain Tank Vessels WithoutDouble Hulls Carrying OtherNon–Petroleum Oil

SOURCE; CGD 91–045, 61 FR 39791, July 30,1996, unless otherwise noted.


(a) The purpose of this subpart is toestablish mandatory safety and oper-ational requirements to reduce envi-ronmental damage resulting from thedischarge of other non-petroleum oil.


(1) Is 5,000 gross tons or more;(2) Carries other non-petroleum oil in

bulk as cargo or cargo residue; and(3) Is not equipped with a double hull


§ 157.610 Operational measures.

An owner or operator of a tank vesselthat carries other non-petroleum oil inbulk as cargo or cargo residue shallcomply with the requirements in allsections of subpart G of this part.

APPENDICES TO PART 157

APPENDIX A—DAMAGE ASSUMPTIONS,HYPOTHETICAL OUTFLOWS, ANDCARGO TANK SIZE AND ARRANGE-MENTS

1. Source. The procedures for the damageassumption calculations contained in thisAppendix conform to Regulations 22, 23, and24 of Annex I of the International Conven-tion for the Prevention of the Pollution fromShips, 1973, done at London, November 2,1973.

2. Assumptions. For the purpose of calculat-ing hypothetical outflow from tank vessels,three dimensions of the extent of damage ofa parallelepiped on the side and bottom ofthe vessel are assumed.

(a) For side damage, the conditions are asfollows:

Damage Conditions

(1) Longitudinal extent lc .............. 1⁄3 L2/3 or 14.5 m, which-ever is less.


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33 CFR Ch. I (7–1–98 Edition)Pt. 157, App. A

Damage Conditions

(2) Transverse extent (tc) (inboardfrom the vessel’s side at rightangles to the centerline at thelevel corresponding to the as-signed summer freeboard).

B—or 11.5 m, whichever

is 5 less.

Damage Conditions

(3) Vertical extent (vc) .................. From the base line up-wards without limit.

(b) For bottom damage, two conditions tobe applied individually to the stated portionsof the vessel, as follows:

DamageConditions

For 0.3L from the forward perpendicular of ship Any other part of ship

(1) Longitudinal extent (l s) ............... L/10 ......................................................................... L/10 or 5 meters, whichever is less.(2) Transverse extent (t s) ................ B/6 or 10 meters, whichever is less but not less

than 5 meters.5 meters.

(3) Vertical extent from the base line(vs).

B/15 or 6 meters, whichever is less ....................... B/15 or 6 meters, whichever is less.

3. Hypothetical Outflow of Oil. (a) The hypo-thetical outflow of oil in the case of sidedamage (Oc) and bottom damage (Os) is cal-culated by the following formula with re-spect to compartments breached by damageto all conceivable locations along the lengthof the vessel to the extent as defined in sec-tion 2 of this Appendix.

(1) For side damages: FormulaOc = Σ Wi+Σ KiCi

(2) For bottom damage: Formula IIOs = 1⁄3(Σ ZiWi+Σ ZiCi)

Where:Wi=Volume of a wing tank assumed to be

breached by the damage as specified in sec-tion 2 of this Appendix; Wi for a segregatedballast tank may be taken equal to zero;

Ci=Volume of a center tank assumed to bebreached by the damage as specified in sec-tion 2 of this Appendix; Ci for a segregatedballast tank may be taken equal to zero;

Ki = −1b

ti

cwhen bi is equal to or greater than tc, Ki isequal to zero;

Zh

vi = −1 i

swhen hi is equal to or greater than vs, Zi isequal to zero;bi=Minimum width of wing tank under con-

sideration measured inboard from the ves-sel’s side at right angles to the centerlineat the level corresponding to the assignedsummer freeboard; and

hi=Minimum depth of the double bottomunder consideration; where no double bot-tom is fitted, hi is equal to zero.(b) If a void space or segregated ballast

tank of a length less than lc is located be-tween wing oil tanks, Oc in formula I of thissection may be calculated on the basis ofvolume Wi being the actual volume of onesuch tank (where they are of equal capacity)

or the smaller of the two tanks (if they differin capacity), adjacent to such space, multi-plied by Si as defined below and taking forall other wing tanks involved in such a colli-sion the value of the actual full volume.

Sl

li = −1 i

c

Where li=length of void space or segregatedballast tank under consideration.

(c) Credit is only given in respect to doublebottom tanks which are either empty or car-rying clean water when cargo is carried inthe tanks above.

(1) If the double bottom does not extend forthe full length and width of the tank in-volved, the double bottom is considered non-existent and the volume of the tanks abovethe area of the bottom damage must be in-cluded in formula II of this section even ifthe tank is not considered breached becauseof the installation of such a partial doublebottom.

(2) Suction wells may be neglected in thedetermination of the value hi if such wellsare not excessive in area and extend belowthe tank for a minimum distance and in nocase more than half the height of the doublebottom. If the depth of such a well exceedshalf the height of the double bottom, hi istaken equal to the double bottom heightminus the well height.

(d) In the case where bottom damage si-multaneously involves four center tanks, thevalue of Os may be calculated according toformula III as follows:

Os = 1⁄4(Σ ZiWi+Σ ZiCi)(e) Credit for reduced oil outflow from bot-

tom damage may be applied to formula IIIfor an installed emergency high suctioncargo transfer system that:

(1) transfers within two hours oil equal toone half of the volume of the largest tank in-volved;

(2) has sufficient ballast or cargo tankageavailable to receive the transferred oil; and


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Coast Guard, DOT Pt. 157, App. B

(3) has the high suction piping installed ata height not less than the vertical extent ofbottom damage (vs).

4. Allowable volumes of cargo tanks.(a) The allowable volume of a wing cargo

tank (VOLw) is equal to seventy-five percentof OA. In a segregated ballast tank vesselVOLw may equal OA for a wing cargo oiltank located between two segregated ballasttanks each of length greater than lc andwidth greater than tc.

(b) The allowable volume of a center cargotank (VOLc) is 50,000 cubic meters.

5. Allowable length of cargo tanks.The length of each cargo tank (1 a) must

not exceed 10 meters or the distance cal-culated from (a), (b), or (c), as appropriate,whichever is greater:

(a) Where no longitudinal bulkhead is pro-vided inside the cargo tanks: 1 a=[0.5(bi/B)+0.1] L, but not to exceed 0.2L.

(b) Where a centerline longitudinal bulk-head is provided inside the cargo tanks: 1a=[0.25(bi/B)+0.15] L, but not to exceed 0.2L.

(c) Where two or more longitudinal bulk-heads are provided inside the cargo tanks:

(1) For wing cargo tanks: 1 a = 0.2L.(2) For center cargo tanks:(i) If (bi/B) is equal to or greater than 0.2,

1 a = 0.2L.(ii) If (bi/B) is less than 0.2:(A) Where no centerline longitudinal bulk-

head is provided, 1 a = [0.5(bi/B) + 0.1] L.(B) Where a centerline longitudinal bulk-

head is provided, 1 a = [0.25(bi/B) + 0.15] L.(d) ‘‘bi’’ is the minimum distance from the

ship’s side to the outer longitudinal bulk-head of the tank in question, measured in-board at right angles to the centerline at thelevel corresponding to the assigned summerfreeboard.

[CGD 74–32, 40 FR 48283, Oct. 14, 1975, asamended by CGD 74–32, 40 FR 49328, Oct. 22,1975; CGD 90–051, 57 FR 36245, Aug. 12, 1992]

APPENDIX B—SUBDIVISION ANDSTABILITY ASSUMPTIONS

1. Source. The procedures for the loadingassumption calculations contained in thisAppendix conform to Regulation 25 of AnnexI of the International Convention for thePrevention of the Pollution from Ships, 1973,done at London, November 2, 1973.

2. Loading Assumptions. For the purpose ofcalculating subdivision and damage stabilityfor a tank vessel, the operating drafts mustreflect actual partial or full load conditionsconsistent with trim and strength of the ves-sel. Ballast conditions need not be consid-ered if the tank vessel is not carrying oil incargo tanks excluding oily residues. Loadingcondition must reflect the specific gravitiesof the cargo.

3. Damage Assumptions.

(a) Damage is applied to all conceivable lo-cations along the length of the vessel as fol-lows:

(1) For a vessel of more than 225 meters inlength, anywhere in the vessel’s length.

(2) For a vessel of more than 150 meters,but not exceeding 225 meters in length, any-where in the vessel’s length except where theafter or forward bulkhead bounding a ma-chinery space located aft is involved in thedamage assumption. The machinery space iscalculated as a single floodable compart-ment.

(3) For a vessel 150 meters or less in length,anywhere in the vessel’s length between ad-jacent transverse bulkheads except the ma-chinery space.

(b) The extent and the character of the as-sumed side or bottom damage, as defined insection 2 of Appendix A of this part, must beapplied except longitudinal bottom damagewithin 0.3L from the forward perpendicularmust be assumed to be the same as that forside damage. If any damage of lesser extentresults in a more severe condition, such dam-age must be assumed.

(c) If damage involves transverse bulk-heads as specified in paragraphs (a)(1) and (2)of this section, transverse watertight bulk-heads must be spaced at least at a distanceequal to the longitudinal extent of the as-sumed damage specified in paragraph (b) ofthis section in order to be considered effec-tive. Where transverse bulkheads are spacedat a lesser distance, one or more of thesebulkheads within such extent of damagemust be assumed as nonexistent for the pur-pose of determining flooded compartments.

(d) If the damages between adjacent trans-verse watertight bulkheads is within the def-inition contained in paragraph (a)(3) of thissection, no main transverse bulkhead or atransverse bulkhead bounding side tanks ordouble bottom tanks is to be assumed dam-aged, unless:

(1) the spacing of the adjacent bulkheads isless than the longitudinal extent of assumeddamage defined in paragraph (b) of this sec-tion; or

(2) there is a step or a recess in a trans-verse bulkhead of more than 3.05 meters inlength, located within the extent of penetra-tions of assumed damage. The step formed bythe after peak bulkhead and after peak tanktop is not regarded as a step for these cal-culations.

(e) If pipes, ducts, or tunnels are situatedwithin the assumed extent of damage, theremust be arrangements so that progressiveflooding may not thereby extend to compart-ments other than those assumed to befloodable for each case of damage.

4. Characteristic and Condition Assumptionfor Calculations.

(a) Account must be taken of any empty orpartially filled tanks, the specific gravity of


478

33 CFR Ch. I (7–1–98 Edition)Pt. 157, App. C

cargoes carried, and any outflow of liquidsfrom damaged compartments.

(b) The permeabilities are assumed as fol-lows:

Intended space use Permeability

Stores ................................................................. 0.60Accommodation ................................................. 0.95Machinery .......................................................... 0.85Voids .................................................................. 0.95Consumable liquids ........................................... 1 0 or 0.95Other liquids ....................................................... 2 10 or 0.95

1 Whichever results in the more severe requirements.2 The permeability of partially filled compartments must be

consistent with actual density and the amount of liquid carried.

(c) The buoyancy of any superstructure di-rectly above the side damage is to be dis-regarded. The unflooded parts of super-structures beyond the extent of damage maybe taken into consideration if they are sepa-rated from the damaged space by watertightbulkheads and no progressive flooding ofthese intact spaces takes place. Class I doorsare allowed in watertight bulkheads in thesuperstructure.

(d) The free surface effect is to be cal-culated:

(1) at an angle of heel of 5 degrees for eachindividual compartment; or

(2) by assessing the shift of liquids by mo-ment of transference calculations.

(e) In calculating the effect of free surfacesof consumable liquids, it is to be assumedthat, for each type of liquid, at least onetransverse pair or a single centerline tankhas a free surface and the tank or combina-tion of tanks to be taken into account is tobe those where the effect of free surface isthe greatest.

APPENDIX C—PROCEDURE FOR DETER-MINING DISTRIBUTION OF SEG-REGATED BALLAST TANKS TO PRO-VIDE PROTECTION AGAINST OIL OUT-FLOW IN THE EVENT OF GROUNDING,RAMMING, OR COLLISION

1. Source. The procedure for determiningthe distribution of segregated ballast tankscontained in this appendix conforms to Reg-ulation 13E of the MARPOL Protocol.

2. Procedure. Protective location of seg-regated ballast tanks, voids, and otherspaces that do not carry cargo which arewithin the cargo tank length is determinedfrom the following:

Σ PAc + Σ PAs =J[Lt(B+2D)]Where:PAc=the side shell area in square meters

based on projected molded dimensionsfor each segregated ballast tank, void, orother space that does not carry cargo andwhich complies with paragraph 2(b) ofthis appendix;

PAs=the bottom shell area in square metersbased on projected molded dimensions

for each segregated ballast tank, void, orother space that does not carry cargo andwhich complies with paragraph 2(b) ofthis appendix;

Lt=the length in meters between the forwardand after extremities of the cargo tanks;

B=the maximum breadth of the ship in me-ters measured amidship to the moldedline of the frame; and

D=the molded depth in meters measured ver-tically from the top of the keel plate tothe top of the freeboard deck beam at theside amidships. In tank vessels havingrounded gunwales, the molded depth ismeasured from the top of the keel plateto the point of intersection of the moldedlines of the deck and side shell plating,the lines being extended as though thegunwale were of angular design.

(a) Method of determining a value for J.(1) For tank vessels for 20,000 DWT, J=0.45.(2) For tank vessels of 200,000 DWT or

more:(i) J=0.30; or(ii) J=the greater of 0.20, or

0 3040

. ,− −+( )

aO Oc s

A

where:a=0.25 for tank vessels of 200,000 DWT.a=0.40 for tank vessels of 300,000 DWT.a=0.50 for tank vessels of 420,000 DWT.

For values of DWT between 200,000 and300,000 DWT, 300,000 and 420,000 DWT, andgreater than 420,000 DWT, the value of ‘‘a’’ isdetermined by linear interpolation.

Oc = as calculated in Appendix A of this part.Os = as calculated in Appendix A of this part.OA = the allowable oil outflow meeting

§ 157.19(b)(1) of this part.(3) For values of DWT between 20,000 and

200,000 DWT, the value of ‘‘J’’ is determinedby linear interpolation between 0.45 and 0.30respectively.

(b) PAc and PAs: Criteria for determining thesegregated ballast tanks, voids, and other spacesthat do not carry cargo.

The following criteria are to be met for asegregated ballast tank, void, or space thatdoes not carry cargo, to be used in determin-ing PAc and PAs:

(1) The minimum width of each wing tankor space, either of which extends for the fulldepth of the vessel’s side or from the maindeck to the top of the double bottoms is 2meters or more. The width is measured in-board from the vessel’s side shell plating atright angles to the vessel’s center line. If awing tank or space has a width anywherewithin it that is less than 2 meters, thatwing tank or space is not used when cal-culating PAc.


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Coast Guard, DOT Pt. 157, App. E

(2) The minimum vertical depth of eachdouble bottom tank or space is B/15 or 2 me-ters, whichever is smaller. If a double bot-tom tank or space has a depth less than B/15or 2 meters, whichever is smaller, anywherewithin it, the double bottom or space is notto be used when calculating PAs.

(3) The minimum width of a wing tank orspace is not measured in the way of—

(i) the turn of the bilge area; or(ii) a rounded gunwale area.(4) The minimum depth of a double bottom

tank or space is not measured in the way ofthe turn of the bilge area.

[CGD 77–058b, 45 FR 43716, June 30, 1980]

APPENDIX D—EXAMPLE OF A PROCEDUREFOR DEDICATED CLEAN BALLASTTANKS OPERATIONS

1. Source. The example procedure for dedi-cated clean ballast tanks operation con-tained in this appendix conforms to theAnnex of Resolution 14 of the MARPOL Pro-tocol.

2. Example Procedure. Dedicated clean bal-last tanks operational procedure:

(a) Before arrival at the loading port:(1) Transfer all remaining slop to a cargo

tank.(2) Ensure that the pumping and piping

designated for clean ballast operation havebeen properly cleaned to accommodate si-multaneous discharge of clean ballast whileloading.

(3) Ensure that all valves to the slop tankand the cargo tanks are closed.

(4) Perform visual inspection of all dedi-cated clean ballast tanks and their contents,if any, for signs of contamination.

(5) Discharge a sufficient amount of cleanballast water to ensure that remaining bal-last water and cargo to be loaded will not ex-ceed the permissible deadweight or draft.Leave a sufficient amount of water for flush-ing the piping, and as a minimum, a quan-tity equal to 10 times the volume of the af-fected piping.

(6) Ensure that all valves to the dedicatedclean ballast tanks are closed.

(7) If no further ballast discharge is antici-pated, drain the clean ballast piping.

(b) In the loading port:(1) Perform normal loading operations of

cargo tanks.(2) Ensure sufficient slop tank capacity is

available for subsequent reception of cargopump and piping flushings.

(3) When applicable, discharge remainingclean ballast before entire piping system isused for loading. Leave the required mini-mum quantity of flushing water in ballasttanks.

(4) Ensure that all valves to the dedicatedclean ballast tanks are closed.

(5) Ensure that all valves to the cargo tankare closed upon completion of loading.

(c) After departure from the loading port:(1) Flush appropriate pumping and piping

with sufficient water from dedicated cleanballast tanks into a slop tank.

(2) Ensure that valves to the slop tank areclosed before pumping the remaining cleanwater overboard and monitoring oil contentof the water.

(3) Ensure that all valves in the dedicatedclean ballast tanks are closed.

(d) Before arrival at the unloading port:(1) Ensure that all valves to the slop tank

and cargo tanks are closed.(2) Recheck that the pumping and piping

designated for clean ballast operation havebeen properly cleaned.

(3) Ballast through clean cargo pumps andpiping, considering the port’s draft require-ments.

(4) Ensure that all valves in the dedicatedclean ballast tanks are closed.

(e) In the unloading port:(1) Allocate pumping and piping intended

for clean ballast operation.(2) Perform normal unloading operations.(3) As soon as draft conditions permit,

complete ballasting to departure conditions.(4) Ensure that all valves to the dedicated

clean ballast tanks are closed.(5) Complete unloading.(f) After departure from the unloading

port:(1) Flush pumps and piping servicing the

dedicated clean ballast tanks into the sloptank.

(2) Top up dedicated clean ballast tanks.(3) Process the slop tank content in accord-

ance with load on top (LOT) procedures.

[CGD 77–058b, 45 FR 43717, June 30, 1980]

APPENDIX E—SPECIFICATIONS FOR THEDESIGN, INSTALLATION AND OPER-ATION OF A PART FLOW SYSTEM FORCONTROL OF OVERBOARD DIS-CHARGES

Source. Appendix 2 to Annex 5 of IMO’s Ma-rine Environment Protection Committeedocument MEPC/Circ. 97. Paragraphs 1 and 2are printed for information. Paragraphs 3, 4,and 5 are incorporated into §§ 157.11 and157.37.

Note: Information in square brackets onFigure 1 has been added by the Coast Guardfor clarity.

1 Purpose

The purpose of these Specifications is toprovide specific design criteria and installa-tion and operational requirements for thepart flow system referred to in Regulation18(6)(e) of Annex I of the International Con-vention for the Prevention of Pollution from


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Ships, 1973 as modified by the Protocol of1978 relating thereto.

2 Application

2.1 Existing oil tankers may, in accord-ance with Regulation 18(6)(e) of Annex I ofMARPOL 73/78, discharge dirty ballast waterand oil contaminated water from cargo tankareas below the waterline, provided part ofthe flow is led through permanent piping toa readily accessible location on the upperdeck or above where it may be visually ob-served during the discharge operation andprovided that the arrangements comply withthe requirements established by the Admin-istration and which shall at least contain allthe provisions of these Specifications.

2.2 The part flow concept is based on theprinciple that the observation of a represent-ative part flow of the overboard effluent isequivalent to observing the entire effluentstream. These specifications provide the de-tails of the design installation, and oper-ation of a part flow system.

3 General Provisions

3.1 The part flow system shall be so fittedthat it can effectively provide a representa-tive sample of the overboard effluent for vis-ual display under all normal operating con-ditions.

3.2 The part flow system is in many re-spects similar to the sampling system for anoil discharge monitoring and control systembut shall have pumping and piping arrange-ments separate from such a system, or com-bined equivalent arrangements acceptable tothe Administration.

3.3 The display of the part flow shall bearranged in a sheltered and readily acces-sible location on the upper deck or above, ap-proved by the Administration (e.g. the en-trance to the pump room). Regard should begiven to effective communication betweenthe location of the part flow display and thedischarge control position.

3.4 Samples shall be taken from relevantsections of the overboard discharge pipingand be passed to the display arrangementthrough a permanent piping system.

3.5 The part flow system shall include thefollowing components:

.1 Sampling probes;

.2 Sample water piping system;

.3 Sample feed pump(s);

.4 Display arrangement;

.5 Sample discharge arrangement; and,subject to the diameter of the sample piping:

.6 Flushing arrangement.

.3.6 The part flow system shall complywith the applicable safety requirements.

4 System Arrangement

4.1 Sampling points.4.1.1 Sampling point locations:

.1 Sampling points shall be so locatedthat relevant samples can be obtained of theeffluent being discharged through outletsbelow the waterline which are being used foroperational discharges.

.2 Sampling points shall as far as prac-ticable be located in pipe sections where aturbulent flow is normally encountered.

.3 Sampling points shall as far as prac-ticable be arranged in accessible locations invertical sections of the discharge piping.

4.1.2 Sampling probes:.1 Sampling probes shall be arranged to

protrude into the pipe a distance of aboutone fourth of the pipe diameter.

.2 Sampling probes shall be arranged foreasy withdrawal for cleaning.

.3 The part flow system shall have a stopvalve fitted adjacent to each probe, exceptthat were the probe is mounted in a cargoline, two stop valves shall be fitted in series,in the sample line.

.4 Sampling probes should be of corrosionresistant and oil resistant material, of ade-quate strength, properly jointed and sup-ported.

.5 Sampling probes shall have a shapethat is not prone to becoming clogged byparticle contaminants and should not gen-erate high hydrodynamic pressures at thesampling probe tip. Figure 1 is an example ofone suitable shape of a sampling probe.

.6 Sampling probes shall have the samenominal bore as the sample piping.

4.2 Sample piping:.1 The sample piping shall be arranged as

straight as possible between the samplingpoints and the display arrangement. Sharpbends and pockets where settled oil or sedi-ment may accumulate should be avoided.

.2 The sample piping shall be so arrangedthat sample water is conveyed to the displayarrangement within 20 seconds. The flow ve-locity in the piping should not be less than2 metres per second.

.3 The diameter of the piping shall not beless than 40 millimetres if no fixed flushingarrangement is provided and shall not be lessthan 25 millimetres if a pressurized flushingarrangement as detailed in paragraph 4.4 isinstalled.

.4 The sample piping should be of corro-sion-resistant and oil-resistant material, ofadequate strength, properly jointed and sup-ported.

.5 Where several sampling points are in-stalled the piping shall be connected to avalve chest at the suction side of the samplefeed pump.

4.3 Sample feed pump:.1 The sample feed pump capacity shall be

suitable to allow the flow rate of the samplewater to comply with 4.2.2.

4.4 Flushing arrangement:.1 If the diameter of sample piping is less

than 40 millimetres, a fixed connexion from


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Coast Guard, DOT Pt. 157, App. E

a pressurized sea or fresh water piping sys-tem shall be installed to enable flushing ofthe sample piping system.

4.5 Display arrangement:.1 The display arrangement shall consist

of a display chamber provided with a sightglass. The chamber should be of a size thatwill allow a free fall stream of the samplewater to be clearly visible over a length of atleast 200 millimetres. The Administrationmay approve equivalent arrangements.

.2 The display arrangement shall incor-porate valves and piping in order to allow apart of the sample water to bypass the dis-play chamber to obtain a laminar flow fordisplay in the chamber.

.3 The display arrangement shall be de-signed to be easily opened and cleaned.

.4 The internal of the display chambershall be white except for the backgroundwall which shall be so coloured in order tofacilitate the observation of any change inthe quality of the sample water.

.5 The lower part of the display chambershall be shaped as a funnel for collection ofthe sample water.

.6 A test cock for taking a grab sampleshall be provided in order that a sample ofthe water can be examined independent ofthat in the chamber.

.7 The display arrangement shall be ade-quately lighted to facilitate visual observa-tion of the sample water.

4.6 Sample discharge arrangement:

.1 The sample water leaving the displaychamber shall be routed to the sea or to aslop tank through piping of adequate diame-ter.

5 Operation

5.1 When a discharge of dirty ballastwater or other oil contaminated water fromthe cargo tank area is taking place throughan outlet below the waterline, the part flowsystem shall provide sample water from therelevant discharge outlet at all times.

5.2 The sample water should be observedparticularly during those phases of the dis-charge operation when the greatest possibil-ity of oil contamination occurs. The dis-charge shall be stopped whenever any tracesof oil are visible in the flow and when the oilcontent meter reading indicates oil contentexceeds permissible limits.

5.3 On those systems that are fitted withflushing arrangements, the sample pipingshould be flushed after contamination hasbeen observed and additionally it is rec-ommended that the sample piping be flushedafter each period of usage.

5.4 The ship’s cargo and ballast handlingmanuals and, where applicable, those manu-als required for crude oil washing systems ordedicated clean ballast tanks operation shallclearly describe the use of the part flow sys-tem in conjunction with the ballast dis-charge and the slop tank decanting proce-dures.


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33 CFR Ch. I (7–1–98 Edition)Pt. 157, App. E

[CGD 75–124a, 48 FR 45721, Oct. 6, 1983]


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Coast Guard, DOT Pt. 157, App. F

APPENDIX F—GUIDELINES AND SPECI-FICATIONS FOR OIL DISCHARGE MON-ITORING AND CONTROL SYSTEMS FORTANKERS

Source. IMO Resolution A.496(XII). Para-graphs 1, 2, 3, and 7 are printed for informa-tion. Paragraphs 4, 5, and 6 are incorporatedinto § 157.12.

Mandatory Language. Wherever the word‘‘should’’ is used in this appendix, substitutethe word ‘‘shall’’. Compliance with these pro-visions is mandatory.

Note. Numbered footnotes have been addedby the Coast Guard for clarity. Footnotes inthe original text have been inserted par-enthetically in the text and are identified byan asterisk.

1 Purpose

1.1 The purpose of these Guidelines andSpecifications is:

.1 To provide a uniform interpretation ofthe requirements of Regulation 15(3)(a) ofAnnex I to the MARPOL 73/78 Convention(1),and

.2 To assist Administrations in determin-ing appropriate design, construction andoperational parameters for oil dischargemonitoring and control systems when suchsystems are fitted in ships flying the flag oftheir State.

2 Background

2.1 The requirements of Annex I to theMARPOL 73/78 Convention relating to oilcontent monitoring of oil tanker ballast andtank washing water are contained in Regula-tion 15(3)(a), which stipulates that oil tank-ers of 150 tons gross tonnage and above shallbe equipped with an approved oil dischargemonitoring and control system and that thesystem shall record continuously:

.1 The discharge of oil in litres per nau-tical mile and total quantity of oil dis-charge; or

.2 In lieu of the total quantity of oil dis-charged, the oil content of the effluent andrate of discharge.

In both cases the record shall be ‘‘identifi-able as to time and date’’ and shall be keptfor at least three years.

2.2 Regulation 15 also stipulates that thesystem shall come into operation when thereis any discharge of effluent into the sea andshall be such as will ensure that any dis-charge of oily mixture is automaticallystopped when the instantaneous rate of dis-charge of oil exceeds that permitted by Reg-ulation 9(1)(a). In existing oil tankers thestopping of the discharge may be performedmanually and the rate of discharge may beestimated from the pump characteristics.

2.3 A test and performance specificationfor the basic oil content meter, indicating

oil content in ppm, has been adopted by Res-olution A.393(X).

2.4 Resolution A.445(XI) recognizes theneed for early installation of oil dischargemonitoring and control systems in orderthat operational experience can be gained.That resolution further invites the MarineEnvironment Protection Committee (MEPC)to develop guidelines for the progressive in-stallation of oil discharge monitoring andcontrol systems for new and existing oiltankers.

3 Application

3.1 An oil discharge monitoring and con-trol system, approved by the Administra-tion, shall be fitted in every oil tanker of 150tons gross tonnage and above, and shall befitted in:

.1 New (*as defined in Regulation 1(6))(2)tankers, on the date of entry into force ofthe Convention;

.2 Existing tankers, within three years ofthe date of entry into force of the Conven-tion.

3.2 Existing tankers operating with atank cleaning procedure using crude oilwashing in accordance with Regulation 13(8)or with dedicated clean ballast tanks in ac-cordance with Regulation 13(9) must fit anoil content meter not later than the firstscheduled shipyard visit after entry intoforce of the Convention.

3.3 An incentive scheme to encourage theearly installation of oil discharge monitor-ing and control systems (ResolutionA.445(XI)) has been developed which allowsdifferent requirements depending on the dateof installation of the system and the size andbuilding date of the oil tanker. The termsused in the description of the various re-quirements are defined in section 4 below.

4 Definitions

4.1 ‘‘Oil discharge monitoring and controlsystem’’

4.1.1 Oil discharge monitoring and controlsystem is a general term covering any one ofthe units referred to in paragraphs 4.2, 4.3,and 4.4.

4.2 ‘‘Control unit’’4.2.1 A control unit is a system which re-

ceives automatic signals of:.1 Oil content;.2 Flow rate of discharge;.3 Ship’s speed;.4 Date and time (G.M.T.); and.5 Discharge valve position (open or

closed).4.2.2 The unit shall make automatic re-

cordings of:.1 Instantaneous rate of discharge of oil;.2 Total quantity of oil discharged;.3 Date and time (G.M.T.);.4 Discharge valve position (open or

closed);


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.5 Alarm condition;

.6 Failure (i.e. no flow, fault etc.); and

.7 Override action (i.e. manual override,flushing, calibration etc.).

4.2.3 The unit shall be fitted with a start-ing interlock and discharge valve control ca-pability. The unit shall meet the specifica-tions contained in the relevant paragraphs ofsection 6.

4.3 ‘‘Computing unit’’.4.3.1 A computing unit is a system which

receives automatic signals of:.1 Oil content;.2 Date and time (G.M.T.);.3 Discharge valve activation;.4 Flow rate of discharge; and.5 Ship’s speed in knots.

The flow rate and ship’s speed may be manu-ally inserted into the unit.

4.3.2 The unit shall make automatic re-cordings of:

.1 Instantaneous rate of discharge of oil;

.2 Total quantity of oil discharged;

.3 Date and time (G.M.T.);

.4 Discharge valve position (open orclosed);

.5 Alarm condition;

.6 Failure (i.e. no flow, fault etc.);

.7 Override action;

.8 Manual input (i.e. speed, flow); and

.9 Oil content if the flow rate has beenmanually inserted.

4.3.3 Unless explicitly stated in the Imple-mentation Requirements (see section 5below) the unit need not be fitted with astarting interlock or discharge valve controlcapability.

4.3.4 The unit shall meet the specifica-tions contained in the relevant paragraphs ofsection 6.

4.4 ‘‘Calculating unit’’.4.4.1 A calculating unit is a system which

received automatic signals of:.1 Oil content;.2 Flow rate of discharge; and.3 Ship’s speed.

The flow rate and ship’s speed may be manu-ally inserted into the unit.

4.4.2 The unit shall make an automaticrecording of:

.1 Oil content, unless the oil contentmeter is provided with a recorder.

4.4.3 The unit shall display:.1 Instantaneous rate of discharge of oil;.2 Total quantity of oil discharged, unless

permitted to be calculated manually.4.4.4 The time and date, instantaneous

rate of discharge of oil and, the total quan-tity of oil discharged may be recorded manu-ally.

4.4.5 The unit need not be fitted with astarting interlock nor discharge valve con-trol capability.

4.4.6 The unit shall meet the specifica-tions contained in the relevant paragraphs ofsection 6.

4.5 ‘‘Starting interlock’’ is an automaticdevice which prevents the initiation of theopening of the discharge valve before themonitoring and control system is fully oper-ational when use of this system is requiredby the Convention.

4.6 The ‘‘discharge valve control’’ is anautomatic device which initiates the se-quence to stop the overboard discharge.

5 Implementation Requirements

5.1 To assist in the implementation ofResolution A.445(XI), an implementationscheme has been developed by the MEPCwhich provides slightly different require-ments for oil discharge monitoring and con-trol systems depending on size and buildingdate of the oil tanker. The scheme also al-lows for different requirements, dependingon the installation date of the system.

5.2 Under the implementation schemecontained in paragraph 5.4 oil tankers of 150tons gross tonnage and above have been ar-ranged into five categories. Each category ofoil tanker shall be fitted with an oil dis-charge monitoring and control system as setout below. The definitions given in section 4should be consulted for a description of thedifferent systems.

5.3 The implementation scheme set out inparagraph 5.4 gives details, with reference toparagraph 4, of the minimum equipment re-quired to comply with this scheme. Where itis expedient to fit equipment of a higher cat-egory than required no objection shall beraised to this arrangement.

5.4 Implementation scheme:5.4.1 Category I—.1 An oil tanker of this category is of 4,000

tons deadweight and above and is a ‘‘newship’’ as defined in Regulation 1(6) of AnnexI of MARPOL 73/78 and the oil dischargemonitoring and control system is installedon or after 1 June 1982.

.2 This category of ship shall be fittedwith a control unit as defined under para-graph 4.2.

5.4.2 Category II—.1 An oil tanker of this category is of 4,000

tons deadweight and above and is a ‘‘newship’’ as defined in Regulation 1(6) of AnnexI of MARPOL 73/78 and the oil dischargemonitoring and control system is installedbefore 1 June 1982.

.2 This category of ship shall be fittedwith a computing unit as defined under para-graph 4.3.

.3 The system shall also be fitted with astarting interlock and a discharge valve con-trol.

5.4.3 Category III—.1 An oil tanker of this category is of 150

tons gross tonnage and above, but less than4,000 tons deadweight and is a ‘‘new ship’’ asdefined in Regulation 1(6) of Annex I ofMARPOL 73/78.


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.3 No automatic devices are required toactivate overboard discharge valve closure,neither is a starting interlock required.

5.4.4 Category IV(a)—.1 An oil tanker of this category is of

20,000 tons deadweight and above and is an‘‘existing ship’’ as defined in Regulation 1(7)of Annex I of MARPOL 73/78 and the oil dis-charge monitoring and control system is in-stalled between one year and three yearsafter the date of entry into force of MARPOL73/78.


.3 The system shall also be fitted with astarting interlock, but need not be fittedwith a discharge valve control.

.4 For oil tankers within this category upto and including 100,000 tons deadweight,where the overboard discharge has localmanual control or where control is providedby means of extension rods, Administrationsmay grant waivers or exemptions from therequirement to fit a starting interlock sys-tem (3).

5.4.5 Category IV(b)—.1 An oil tanker of this category is of

20,000 tons deadweight and above and is an‘‘existing ship’’ as defined in Regulation 1(7)of Annex I of MARPOL 73/78 and the oil dis-charge monitoring and control system is in-stalled not later than one year after the dateof entry into force of MARPOL 73/78.



5.4.6 Category V(a)—.1 An oil tanker of this category is of 150

tons gross tonnage and above but less than20,000 tons deadweight and is an ‘‘existingship’’ as defined in Regulation 1(7) of AnnexI of MARPOL 73/78 and the oil dischargemonitoring and control system is installedbetween one year and three years after theentry into force of MARPOL 73/78.

.2 This category of ship shall be fittedwith a calculating unit as defined underparagraph 4.4.


5.4.7 Category V(b)—.1 An oil tanker of this category is of 150

tons gross tonnage and above but less than20,000 tons deadweight and is an ‘‘existingship’’ as defined in Regulation 1(7) of AnnexI to MARPOL 73/78 and the oil dischargemonitoring and control system is installednot later than one year after the entry intoforce of MARPOL 73/78.

.2 This category of ship shall be fittedwith a calculating unit as defined underparagraph 4.4. However, the total quantity ofoil discharged may be computed manually.


5.5 Shown at the Appendix is a summary,in tabular form, of the implementation re-quirements (4).

6 Technical Specifications

6.1 Oil discharge monitoring and controlsystem:

6.1.1 The oil discharge monitoring andcontrol system shall be so fitted that it caneffectively monitor and control the dis-charge of any effluent into the sea throughthose overboard discharge outlets permittedby Regulation 18(2) which in the opinion ofthe Administration are necessary to fulfillthe operational requirements of the tanker(5). The system should additionally cover:

.1 The gravitational discharge of ballastwater from cargo tanks; and

.2 The midship cargo manifold arrange-ment when used to meet the requirements ofRegulation 18.

6.1.2 The discharge of dirty ballast wateror oil contaminated water into the seathrough outlets which are not controlled bythe monitoring and control system is an in-fringement of the Convention (6).

6.1.3 The system should function effec-tively, according to the criteria shownbelow, under all environmental conditionswhich vessels are normally assumed to en-counter, and shall be designed and con-structed to withstand the environmentalconditions as specified in paragraph 6.1.6 ofthese Guidelines and Specifications:

.1 Except where manual operation of thesystem is permitted the system shall be sodesigned that no ballast discharge can takeplace unless the monitor is in the normal op-erating mode and the relevant samplingpoint has been connected to the monitor.

.2 Preferably the system should have aminimum number of discharge outlets andsampling points so arranged that dischargecan take place via only one sampling pointat a time.

.3 Where it is intended that more thanone line is used for simultaneous dischargepurposes, one oil content meter (7), togetherwith a flow meter, shall be installed per dis-charge line. These instruments shall be con-nected to a common processing unit.

.4 In order to avoid alarms due to shortterm high oil concentration signals (spikes)causing indications of high instantaneousrates of discharge, the short term high ppmsignal may be suppressed for a maximum of10 seconds by employing a delay relay. Alter-natively, the instantaneous rate of dischargemay be the average during the preceding 20


486


seconds or less as computed from instanta-neous ppm values produced by the oil con-tent meter with intervals of a maximum of 5seconds.

6.1.4 The system should comprise the fol-lowing:

.1 An oil content meter to measure the oilcontent of the effluent in parts per million.This meter shall be approved in accordancewith the provisions contained in resolutionA.393(X)(8) and certified to take into accountthe range of cargoes carried;

.2 A flow rate system to indicate thequantity of effluent being discharged in aunit of time (see also paragraphs 6.3.7 and6.3.8);

.3 A vessel speed indicating device; to givethe vessel’s speed in knots (see also para-graphs 6.4.2 and 6.4.3);

.4 A sampling system to convey a rep-resentative sample of the effluent to the oilcontent meter;

.5 A control section which includes:

.5.1 A processor, which accepts signals ofoil content, flow rate and the vessel’s speedand converts them into litres per nauticalmile and the total quantity of oil discharged(see also paragraph 6.5.3);

.5.2 A transmitting device to providealarms and, where required, command sig-nals to the discharge control arrangement;

.5.3 A recording device to provide, whererequired, a continuous record of the effluentdischarge;

.5.4 A manual override system to be usedin the event of failure of the monitoring andcontrol system; and

.5.5 Where required a transmitting deviceto provide signals to a starting interlockpreventing the discharge of effluent beforethe oil content meter is fully operative.

6.1.5 The electrical components of the sys-tem installed in a hazardous area of a vesselshall meet the appropriate safety require-ments (*As contained in the provisions ofIEC Publication 92 or its equivalent.) (9) pro-vided for these areas.

6.1.6 The control section of an oil dis-charge monitoring and control system shallbe capable of operating satisfactorily underthe following environmental conditions:.1 Ambient air temperature: 0° C to 55° C in en-

closed spaces; ¥25° C to 55° C on open decks.2 Vibration: 2.0 Hz to 13.2 Hz, with displace-

ment amplitude of ±1.0 mm 13.2 Hz to 80.0Hz, with an acceleration amplitude of ±0.7g

.3 Voltage variations for alternating current:permanent variation of ±10%

.4 Inclination: inclination at angles of up to22.5° in any place from the normal oper-ational position6.2 Sampling system:6.2.1 Sampling points should be so located

that relevant samples can be obtained fromthose outlets that are used for operationaldischarges in accordance with paragraph

6.1.1. The sampling probes located in theoverboard discharge lines and the piping sys-tem connecting the sampling probes to theoil content meter should meet the followingrequirements:

.1 The piping and probes shall be of corro-sion-resistant and oil-resistant material, ofadequate strength, properly jointed and sup-ported;

.2 The system shall have a stop valvefitted adjacent to each probe, except thatwhere the probe is mounted in a cargo line,e.g. to the midship cargo manifold arrange-ment, two stop valves shall be fitted, in se-ries, in the sample line;

.3 Sampling probes should be arranged foreasy withdrawal and should as far as prac-ticable be mounted at an accessible locationin a vertical section of the discharge line. Ifa sampling point has to be made in a hori-zontal section then suitable arrangementsshould be made to obtain representativesamples. Sampling probes should normallypenetrate inside the discharge pipe to a dis-tance of one quarter the diameter of thatpipe;

.4 Means shall be provided for cleaningthe probes and piping system by the provi-sion of permanent clean water flushing ar-rangements or some other equivalent meth-od, especially in the case of probes mountedin a cargo line. The design of the probes andpiping should be such as to minimize theirclogging by oil, oily residue and other mat-ter;

.5 The velocity of the fluid in the pipingshall be such that, taking into considerationthe length of the piping, the overall responsetime should be as short as possible betweenan alteration in the mixture being pumpedand the alteration in the meter reading andin any case not more than 40 seconds;

.6 The location of sampling probes in rela-tion to any point of flow diversion to a sloptank shall be selected with regard to theneed for sampling the oily water in the recir-culation mode;

.7 The arrangements for driving the sam-pling pump or any other pumps such as thoseprovided for washing windows shall have re-gard to the safety requirements of the spacein which the pump is located;

.8 The flushing arrangements should besuch that where necessary they can be uti-lized for stabilizing the oil content meterand for correcting zero setting;

.9 Sample water when returned to theslop tank shall not be allowed to free fallinto the tank.

6.3 Flow rate indicating system:6.3.1 A flow meter for measuring the rate

of discharge should be installed in a verticalsection of a discharge line or in any othersection of discharge line as appropriate, so asto be always filled with the liquid.


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6.3.2 A flow meter should employ an oper-ating principle which is suitable for ship-board use and, where relevant, can be used inlarge diameter pipes.

6.3.3 A flow meter should be suitable forthe full range of flow rates that may be en-countered during normal operation. Alter-natively, arrangements such as the use oftwo flow meters of different ranges or a re-striction of the operational flow rate rangemay be necessary to meet this requirement.

6.3.4 The flow meter, as installed, shouldhave an accuracy of ±15 percent, or better, ofthe instantaneous rate throughout the oper-ating range.

6.3.5 Any component part of the flowmeter in contact with the effluent dischargeincluding associated piping, if fitted, shall beof corrosion-resistant and oil-resistant mate-rial of adequate strength.

6.3.6 The design of the flow metering ar-rangements shall have regard to the safetyrequirements of the space in which such me-tering arrangements are located.

6.3.7 In ships fitted with a computing unitthe flow rate may be determined from thepump characteristics and the data manuallyinserted into the unit.

6.3.8 In ships fitted with a calculatingunit the flow rate may be manually insertedinto the unit. The flow rate is to be esti-mated from the best available source e.g.pump characteristics, speed of pump(s),ullages or knowledge of pumping rates forparticular tanks on the ship.

6.3.9 In oil tankers where the gravita-tional discharges of ballast water from thecargo tanks is an established practice, in ac-cordance with Regulation 18(6)(d), means,such as calibration curves, shall be providedto estimate the flow rate of discharge.

6.4 Vessel’s speed indicating system:6.4.1 The automatic speed signal required

for the control unit shall be obtained fromthe vessel’s speed indicating device (*See‘‘Recommendation on Performance Stand-ards for Devices to Indicate Speed and Dis-tance (Annex to Resolution A.478(XII)).) bymeans of a repeater signal. This informationshall be readily available in a form that canbe accepted by a processor. The speed infor-mation used may be either speed over theground or speed through the water dependingupon the speed measuring equipment in-stalled on board.

6.4.2 In ships where a computing unit isrequired the vessel’s speed may be manuallyinserted into the unit. This data shall be ob-tained from the ship’s log or from an indicat-ing device which transmits signals whichneed not be in a form which can be acceptedby a computer system.

6.4.3 The vessel’s speed on ships requiredto install a calculating unit may be obtainedfrom the ship’s log or from the navigationcharts and shall be estimated from the mostreliable source.

6.5 Processor and transmitting device:6.5.1 The processor should receive, at time

intervals not exceeding 5 seconds, signalsfrom the oil content meter, the flow ratemeasuring system, and the vessel’s speed in-dicator and automatically compute the fol-lowing:

.1 Instantaneous rate of discharge of oilin litres per nautical mile; and

.2 Total quantity of oil discharged pervoyage in cubic meters or litres.

6.5.2 When the calculations of the proc-essor exceed the limits imposed by Regula-tion 9(1)(a) (iv) and (v) (10) the transmittingdevice will provide alarms and, in new ships,it will also provide command signals to thedischarge valve control which will cause thedischarge of effluent into the sea to stop.

6.5.3 In existing ships fitted with a cal-culating unit where the unit is installedearly, the total quantity of oil dischargedmay be computed manually.

6.6 Recording devices:6.6.1 Control Unit—.1 The recording device for a control unit

should include a digital printer or an ana-logue recorder or the combination of both ora recorded visible display. The record shallbe identifiable as to the time and date andshall be kept for at least three years (11).

.2 The data to be automatically recordedshall include at least the following items:

.2.1 Instantaneous rate of discharge of oil(litres per nautical mile);

.2.2 The total quantity of oil discharged(litres);

.2.3 Time and date (G.m.t.);

.2.4 The discharge valve position (open orclosed);

.2.5 Alarm condition;

.2.6 Failure (i.e. no flow, fault, etc.); and

.2.7 Override action (i.e. manual override,flushing, calibrating, etc.).

6.6.2 Computing Unit—.1 The recording device for a computing

unit should include a digital printer or ananalogue recorder or the combination ofboth or a recorded visible display. The recordshall be identifiable as to the time and dateand shall be kept for at least three years (11).Manual input information should be identifi-able on the record.

.2 The data to be automatically recordedshall include at least the following items:

.2.1 Instantaneous rate of discharge of oil(litres per nautical mile);

.2.2 The total quantity of oil discharged(litres);

.2.3 Time and date (G.m.t.);

.2.4 Manual input information;

.2.5 The valve position (open or closed);

.2.6 Alarm condition;

.2.7 Failure (i.e. no flow, fault, etc.);

.2.8 Override action (i.e. manual override,flushing, calibration, etc.); and

.2.9 Oil content if flow rate is manuallyinserted.


488


6.6.3 Calculating Unit—.1 An automatic recording device is not

required for a calculating unit, but, wherefitted, the recording device should include adigital printer or an analogue recorder or thecombination of both or a recorded acceptablevisible display. The record shall be identifi-able as to time and date, which may be en-tered manually, and shall be kept for at leastthree years (11).

.2 The data to be automatically recordedon the above-mentioned recording deviceshall include at least the following item: Oilcontent in ppm, unless the oil content meteris provided with a recorder.

6.6.4 Recording for digital printers.Occasions of recordings. Data required in

paragraphs 6.6.1.2, 6.6.2.2, and 6.6.3.2 of theseSpecifications shall be printed out with thefollowing minimum frequency:

.1 When the discharge is started;

.2 When the discharge is stopped;

.3 At intervals of not more than 10 min-utes;

.4 When an alarm condition is developed;

.5 When normal conditions are restored;

.6 At the change of valve order or valveposition;

.7 When introducing input data;

.8 Whenever the computed rate of dis-charge varies by 10 litres/nautical mile, un-less an equivalent trend-indicating arrange-ment is provided;

.9 When selecting zero setting or calibra-tion mode; and

.10 On manual command.6.6.5 Recording for analogue recorders.Data required in paragraphs 6.6.1.2, 6.6.2.2

and 6.6.3.2 of these Specifications should becontinuously recorded in such a way aswould satisfy the following requirements:

.1 The chart speed should be indicated. Ifthe speed is controllable, the recorder shallbe provided with a marker to identify thespeed of the chart paper; and

.2 Means shall be provided to enable thechart paper to be interpreted as to time, dateand readings after it has been removed fromthe recorder.

6.7 Data display.6.7.1 The current data shall be visibly dis-

played.6.7.2 The recording device and the data

display should be located in a position easilyaccessible to the person in charge of the op-eration of discharging the effluent over-board.

6.8 Manually operated alternatives.6.8.1 The alternative means and informa-

tion for use in case of any one failure in thesystem should be as follows:

.1 Oil Content meter: visual observationof the surface of the water (12);

.2 Sampling pump: visual observation ofthe surface of the water;

.3 Flow meter: pump characteristics, etc.;

.4 Vessel’s speed indicating device: mainengine R.P.M., etc.;

.5 Processor: manual calculation andmanual recording; and

.6 Discharge valve control: manual oper-ation of pumps and valves.

6.9 Alarm conditions resulting in thestopping of discharge.

6.9.1 Audio-visual alarms shall be initi-ated for any of the following conditions:

.1 Whenever the instantaneous rate of dis-charge of oil exceeds 60 litres per nauticalmile;

.2 When the total quantity of oil dis-charged reaches the allowable limit pre-scribed by the provisions of the relevantRegulations;

.3 Failure of the system’s operation, suchas:

.3.1 Power failure;

.3.2 Loss of sample;

.3.3 Failure of the measuring or recordingsystem; or

.3.4 When the input signal of the sensorsexceeds the effective capacity of the system.

6.10 Location of alarm indicator6.10.1 The alarm indicator of the system

shall be installed in the cargo control roomwhere provided and/or other places where itwill attract immediate attention and action.

7 Equipment, Operation and MaintenanceManuals

7.1 Administrations shall ensure that ap-proved equipment, operational and/or main-tenance manuals for the various items com-prising the oil discharge monitoring and con-trol systems are on board the vessel. Thesemanuals shall cover the oil content meter,control, computing or calculating unit, flowmeter and ship’s speed indicator, where re-quired.

FOOTNOTES: (ADDED BY THE U.S. COASTGUARD FOR CLARITY.)

(1) The ‘‘MARPOL 73/78 Convention’’ is re-ferred to as the MARPOL Protocol’’ in 33CFR, Part 157.

(2) Also defined in § 157.03(i).(3) The Coast Guard has determined that a

starting interlock system is not required onCategory IV(a) vessels that are 100,000 DWTor less.

(4) The Coast Guard is not publishing thisAppendix.

(5) Section 157.11(b)(2) requires at least onedischarge point.

(6) Section 157.37(a) requires all overboarddischarges of oily mixtures to be monitored.

(7) The ‘‘oil content meter’’ is referred toas a ‘‘cargo monitor’’ in 33 CFR Part 157 and46 CFR Subpart 162.050.

(8) Approval under 46 CFR Subpart 162.050constitutes compliance with this resolution.


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Coast Guard, DOT Pt. 157, App. G

Section 157.12(b) requires that monitors in-stalled on U.S. vessels must be approvedunder 46 CFR Subpart 162.050.

(9) U.S. vessels are required to meet 46 CFRParts 110–113, Electrical Engineering Regula-tions, which also constitutes compliancewith IEC Publication 92.

(10) Sections 157.37(a) (3) and (4) impose thesame limits. These limits relate to instanta-neous rate and total quantity of oil dis-charged.

(11) Section 157.37(d) also requires that dis-charge data be kept for three years.

(12) Section 157.37(a)(6) also requires visualobservation of the discharge if the systemfails.

[CGD 75–124a, 48 FR 45723, Oct. 6, 1983]

APPENDIX G—TIMETABLES FOR APPLICA-TION OF DOUBLE HULL REQUIRE-MENTS

1. Source. These timetables conform to 46U.S.C. 3703a(c).

2. Timetables.(a) In this section, the age of a vessel is de-

termined from the later of the date on whichthe vessel is—

(1) Delivered after original construction;(2) Delivered after completion of a major

conversion; or(3) Qualified for documentation under sec-

tion 4136 of the Revised Statutes of theUnited States (46 U.S.C. app. 14).

(b) A vessel of less than 5,000 gross tons forwhich a building contract or contract formajor conversion was placed before June 30,1990, and that is delivered under that con-tract before January 1, 1994, and a vesselthat had its appraised salvage value deter-mined by the Coast Guard before June 30,1990, and that qualifies for documentationunder section 4136 of the Revised Statutes ofthe United States (46 U.S.C. app. 14) beforeJanuary 1, 1994, may not operate in the navi-gable waters or the Exclusive Economic Zoneof the United States after January 1, 2015,unless equipped with a double hull or with adouble containment system determined bythe Coast Guard to be as effective as a dou-ble hull for the prevention of a discharge ofoil.

(c) A vessel for which a building contractor contract for major conversion was placedbefore June 30, 1990, and that is deliveredunder that contract before January 1, 1994,and a vessel that had its appraised salvagedetermined by the Coast Guard before June30, 1990, and that qualifies for documentationunder 46 CFR subpart 67.19 before January 1,1994, may not operate in the navigable wa-ters or Exclusive Economic Zone of theUnited States unless equipped with a doublehull—

(1) In the case of vessel of at least 5,000gross tons but less than 15,000 gross tons—

(i) After January 1, 1995, if the vessel is 40years old or older and has a single hull, or is45 years old or older and has a double bottomor double sides;

(ii) After January 1, 1996, if the vessel is 39years old or older and has a single hull, or is44 years old or older and has a double bottomor double sides;

(iii) After January 1, 1997, if the vessel is 38years old or older and has a single hull, or is43 years old or older and has a double bottomor double sides;

(iv) After Janaury 1, 1998, is the vessel is 37years old or older and has a single hull, or is42 years old or older and has a double bottomor double sides;

(v) After January 1, 1999, if the vessel is 36years old or older and has a single hull, or is41 years old or older and has a double bottomor double sides;

(vi) After January 1, 2000, if the vessel is 35years old or older and has a single hull, or is40 years old or older and has a double bottomor double sides;

(vii) After January 1, 2005, if the vessel is25 years old or older and has a single hull, oris 30 years old or older and has a double bot-tom or double sides;

(2) In the case of a vessel of at least 15,000gross tons but less than 30,000 gross tons—



(iii) After January 1, 1997, if the vessel is 36years old or older and has a single hull, or is41 years old or older and has a double bottomor double side;

(iv) After January 1, 1998, if the vessel is 34years old or older and has a single hull, or is39 years old or older and has a double bottomor double sides;



(vii) After January 1, 2001, if the vessel is29 years old or older and has a single hull, oris 34 years old or older and has a double bot-tom or double sides;

(viii) After January 1, 2002, if the vessel is28 years old or older and has a single hull, oris 33 years old or older and has a double bot-tom or double sides;

(ix) After January 1, 2003, if the vessel is 27years old or older and has a single hull, or is32 years old or older and has a double bottomor double sides;


490

33 CFR Ch. I (7–1–98 Edition)Pt. 158

(x) After Janaury 1, 2004, if the vessel is 26years old or older and has a single hull, or is31 years old or older and has a double bottomor double sides;

(xi) After January 1, 2005, if the vessel is 25years old or older and has a single hull, or is30 years old or older and has a double bottomor double sides; and

(3) In the case of a vessel of at least 30,000gross tons—



(iii) After January 1, 1997, if the vessel is 26years old or older and has a single hull, or is31 years old or older and has a double bottomor double sides;

(iv) After January 1, 1998, if the vessel is 25years old or older and has a single hull, or is30 years old or older and has a double bottomor double sides;



(d) Except as provided in paragraph (b) ofthis section—

(1) A vessel that has a single hull may notoperate after January 1, 2010, and

(2) A vessel that has a double bottom ordouble sides may not operate after January1, 2015.

NOTE: Double sides and double bottomsmust meet the relevant requirements in§ 157.10d (c) or (d), as appropriate. A vesselwill be considered to have a single hull if ithas neither double sides nor a double bottomthat meets the relevant requirements in§ 157.10d(c) or § 157.10d(d).

[CGD 90–051, 57 FR 36245, Aug. 12, 1992]

PART 158—RECEPTION FACILITIESFOR OIL, NOXIOUS LIQUID SUB-STANCES, AND GARBAGE

Subpart A—General

Sec.158.100 Purpose.158.110 Applicability.158.115 Penalties for violation.158.120 Definitions and acronyms.158.130 Delegations.158.133 Which ports and terminals must pro-

vide reception facilities?

158.135 Which ports and terminals musthave Certificates of Adequacy?

158.140 Applying for a Certificate of Ade-quacy.

158.150 Waivers and alternatives.158.160 Issuance and termination of a Cer-

tificate of Adequacy.158.163 Reception facility operations.158.165 Certificate of Adequacy: Change of

information.158.167 Reporting inadequate reception fa-

cilities.

SUSPENSION, REVOCATION, AND APPEALS

158.170 Grounds for suspension.158.172 Notification of a suspension order.158.174 Suspension of a Certificate of Ade-

quacy: Procedure.158.176 Effect of suspension of a Certificate

of Adequacy.158.178 Actions during a suspension.158.180 Certificate of Adequacy: Procedure

after revocation or the part no longer ap-plies.

158.190 Appeals.

Subpart B—Criteria for Reception Facilities:Residues and Mixtures Containing Oil

158.200 General.158.210 Ports and terminals loading crude

oil.158.220 Ports and terminals loading more

than 1,000 metric tons of oil other thancrude oil or bunker oil.

158.230 Ports and terminals other than portsand terminals under §§ 158.210, 158.220, and158.240.

158.240 Ship repair yards.158.250 Standard discharge connection.

Subpart C—Criteria for Certifying That aPort’s or Terminal’s Facilities Are Ade-quate for Receiving NLS Residue

158.300 Purpose.158.310 Reception facilities: General.158.320 Reception facilities: Capacity and

exceptions.158.330 Ports and terminals: Equipment.

Subpart D—Criteria for Adequacy ofReception Facilities: Garbage

158.400 Purpose.158.410 Reception facilities: General.158.420 Reception facilities: Capacity and

exceptions.

Subpart E—Port and Terminal Operations

158.500 Draining cargo area and piping sys-tems.

158.520 Following the instruction manual.

AUTHORITY: 33 U.S.C. 1903(b); 49 CFR 1.46.


pt. 157 33 cfr ch. i (7–1–98 edition) · 157.10csegregated ballast tanks, crude oil washing...

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