nes 512

Guide to Cables, Electrical and AssociatedItems

Part 1

General

Ministry of Defence Defence Standard 02-512 Part 1

Issue 2 Publication Date 16 September 2002

Category 2

AMENDMENTS ISSUED SINCE PUBLICATION

AMD NO DATE OFISSUE

TEXT AFFECTED SIGNATURE &DATE

Revision Note

This Issue of this Standard has been prepared to incorporate changes to text and presentation.The technical content has been updated in line with current practice.

Historical Record

NES 512, Part 1, Issue 1 Oct 91Def Stan 02-512, Part 1, Issue 1 Apr 00

1

DEFENCE STANDARD 02–512 (NES 512 )

GUIDE TO CABLES, ELECTRICAL AND ASSOCIATED ITEMS

PART 1 ISSUE 2

GENERAL

This Defence Standard is

authorized for use in MOD contracts

by the Defence Procurement Agency and

the Defence Logistics Organization

Published by:

Defence Procurement AgencyAn Executive Agency of The Ministry of DefenceUK Defence StandardizationKentigern House65 Brown StreetGlasgow G2 8EX

DEF STAN 02–512 PART 1 / ISSUE 2(NES 512)

2

SCOPE

1. This Part of the Defence Standard contains general information on categories, types, characteristics,application and selection of Electric Cables and Equipment Wires for use in HM Surface Ships andSubmarines.


3

FOREWORD

Sponsorship

1. This Defence Standard is sponsored by the Defence Logistics Organization (DLO), Ministry of Defence(MOD).

2. The complete Defence Standard 02–512 comprises:

Guide to Cables, Electrical and Associated Items

Part 1: General

Part 2: Cables, Electrical, Silicone Rubber Insulated, Limited Fire Hazard (LFH) orChlorosulphonated, Polyethylene (CSP) Sheathed for General Purposes

Part 3: Cables, Electrical, Ethylene Propylene (EP) Rubber Insulated and Halogen Free RubberInsulated, Limited Free Hazard (LFH) or Chlorosulphonated Polyethylene (CSP)Sheathed for General Services

Part 4: Withdrawn

Part 5: Cables, Electrical, Radio Frequency

Part 6: Cables, Electrical, Miniature and Sub–miniature and Equipment Wires

Part 7: Cables and Wires, Electrical, Miscellaneous for Special Services

Part 8: Cables, Electrical, Thin Wall Insulated, Limited Fire Hazard (LFH) for General Services

Part 9: Not Issued

Part 10: Terminations and Connectors

Part 11: Glands, Grommets and Deck Tubes

Part 12: Index of NATO Stock Numbers and Cable Specifications for Cables Listed in Parts 2to 8

Part 13: Cables (Imperial) Nearest Metric Equivalents

3. Any user of this standard either within MOD or in industry may propose an amendment to it. Proposalsfor amendments that are not directly applicable to a particular contract are to be made to the publishingauthority identified on Page (i), and those directly applicable to a particular contract are to be dealt withusing contract procedures.

4. If it is found to be unsuitable for any particular requirement MOD is to be informed in writing of thecircumstances.

5. No alteration is to be made to this standard except by the issue of an authorized amendment.

6. Unless otherwise stated, reference in this standard to approval, approved, authorized and similar terms,means by the MOD in writing.

7. Any significant amendments that may be made to this standard at a later date will be indicated by a verticalsideline. Deletions will be indicated by 000 appearing at the end of the line interval.

8. This standard has been reissued to reflect changes in Departmental Nomenclature due to the MODreorganization.

Conditions of Release

General

9. This Defence Standard has been devised solely for the use of the MOD, and its contractors in the executionof contracts for the MOD. To the extent permitted by law, the MOD hereby excludes all liability whatsoeverand howsoever arising (including but without limitation, liability resulting from negligence) for any lossor damage however caused when the Defence Standard is used for any other purpose.


4

10. This document is Crown Copyright and the information herein may be subject to Crown or third partyrights. It is not to be released, reproduced or published without written permission of the MOD.

11. The Crown reserves the right to amend or modify the contents of this Defence Standard without consultingor informing any holder.

MOD Tender or Contract Process

12. This Defence Standard is the property of the Crown. Unless otherwise authorized in writing by the MODmust be returned on completion of the contract, or submission of the tender, in connection with which itis issued.

13. When this standard is used in connection with a MOD tender or contract, the user is to ensure that he isin possession of the appropriate version of each document, including related documents, relevant to eachparticular tender or contract. Enquiries in this connection may be made to the authority named in the tenderor contract.

14. When Defence Standards are incorporated into MOD contracts, users are responsible for their correctapplication and for complying with contractual and other statutory requirements. Compliance with aDefence Standard does not of itself confer immunity from legal obligations.

Categories of Naval Defence Standard

15. The Category of this standard has been determined using the following criteria:

a. Category 1. If not applied may have a Critical affect on the following:

Safety of the vessel, its complement or third parties.

Operational performance of the vessel, its systems or equipment.

b. Category 2. If not applied may have a Significant affect on the following:

Safety of the vessel, its complement or third parties.

Operational performance of the vessel, its systems or equipment.

Through life costs and support.

c. Category 3. If not applied may have a Minor affect on the following:

MOD best practice and fleet commonality.

Corporate experience and knowledge.

Current support practice.

Related Documents

16. In the tender and procurement processes the related documents listed in each section and Annex A can beobtained as follows:

a. British Standards British Standards Institution,389 Chiswick High Road,London, W4 4AL

b. Defence Standards Defence Procurement AgencyAn Executive Agency of the Ministry of DefenceUK Defence StandardizationKentigern House65 Brown StreetGlasgow, G2 8EX.

c. Other documents Tender or Contract Sponsor to advise.

17. All applications to the MOD for related documents are to quote the relevant MOD Invitation to Tender orContract number and date, together with the sponsoring Directorate and the Tender or Contract Sponsor.


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18. Prime Contractors are responsible for supplying their subcontractors with relevant documentation,including specifications, standards and drawings.

Health and Safety

Warning

19. This Defence Standard may call for the use of processes, substances and/or procedures that are injuriousto health if adequate precautions are not taken. It refers only to technical suitability and in no way absolveseither the supplier or the user from statutory obligations relating to health and safety at any stage ofmanufacture or use. Where attention is drawn to hazards, those quoted may not necessarily be exhaustive.

20. This Defence Standard has been written and is to be used taking into account the policy stipulated in JSP430: MOD Ship Safety Management System Handbook.

Additional Information

21. To assist in the selection process reference is to be made to the following Parts of this standard:

a. Parts 2 to 8 – inclusive for Data sheets of individual cables and equipment wires, together with theirappropriate terminations to suit conductor size and corresponding types and sizes of equipmentglands/grommets, bulkhead glands and deck tubes.

b. Part 4 – Withdrawn.

c. Part 10 – for details of terminations and connectors.

d. Part 11 – for information on glands, grommets and deck tubes specified in the data sheets.

e. Part 12 – for list of NATO Stock Numbers (NSN) and associated cable specifications in NSNnumerical order.

f. Part 13 – for determining the nearest equivalent metric cable for an obsolete/ obsolescent imperialcable.

22. In accordance with Ministry of Defence (MOD) policy to reduce the dangers to personnel and damage toequipment from smoke, toxic fumes and corrosive gases when electrical wires and cables are subjected tofire, an extended range of Limited Fire Hazard (LFH)wires, cables and ancillary components is nowavailable. LFH components are to be used in all new construction MOD vessels and are also to beincorporated retrospectively in existing vessels when opportunities arise.

23. A listing of a wire or cable does not in itself guarantee availability off-the-shelf from Naval Stores. Itemsthat are low usage and, therefore, probably not readily available are shown in italics.


6

CONTENTS

Page No

TITLE PAGE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SCOPE 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FOREWORD 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sponsorship 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conditions of Release 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Categories of Naval Defence Standard 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documents 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Health and Safety 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Additional Information 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONTENTS 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1. PERFORMANCE SPECIFICATION 7. . . . . . . . . . .

SECTION 2. NATIONAL/INTERNATIONAL REGULATIONS 7

SECTION 3. MILITARY STANDARDS/REQUIREMENTS 7. . . .

SECTION 4. DESIGN REQUIREMENTS/GUIDANCE 7. . . . . . . 4.1 Cables – Categories, Types, Characteristics,

Application and Selection 7. . . . . . . . . . . . . . . . . . . . . 4.1.1 Naval Shipwiring Cable Categories 7. . . . . . . . . . . . . Table 4.1 Cable Categories 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.2 Cables – Cable Insulation/Sheath Materials 8. . . . . . Table 4.2 Cable Insulation/Sheath Materials 8. . . . . . . . . . . . . . 4.1.3 Cable Selection – Procedure 9. . . . . . . . . . . . . . . . . . . 4.1.4 Cable Selection – General 10. . . . . . . . . . . . . . . . . . . . . 4.1.5 Cable Selection – Use of Fire Resisting Cable 10. . . . . 4.1.6 Cable Selection – Special Cables (see Clause 4.1.1) 104.1.7 Cable Selection – Radio Frequency (RF) Cable 10. . . 4.1.8 Cable Selection – Submarines 10. . . . . . . . . . . . . . . . . .

SECTION 5. CORPORATE EXPERIENCE & KNOWLEDGE 11.

ANNEX A RELATED DOCUMENTS 12. . . . . . . . . . . . . . . . . . . .

ANNEX B ABBREVIATIONS 14. . . . . . . . . . . . . . . . . . . . . . . . . . .

ALPHABETICAL INDEX 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DEF STAN 02–512 PART 1 / ISSUE 1(NES 512 Part 1)

7

1. PERFORMANCE SPECIFICATION

(No relevant information included)

2. NATIONAL/INTERNATIONAL REGULATIONS


3. MILITARY STANDARDS/REQUIREMENTS


4. DESIGN REQUIREMENTS/GUIDANCE

See Annex A.

4.1 Cables – Categories, Types, Characteristics, Application and Selection

4.1.1 Naval Shipwiring Cable Categories

a . The majority of cables used in naval shipwiring fall into the categories detailed

in Table 4.1.

CableCategory

Insulation Sheath OperatingTemperature

ConstructionSpecification

Group

FireResistant

SiliconeRubber

LFH up to 105�CDEF STAN02-527

1 and 2

Power EPR/LFH LFH up to 85�CDEF STAN02-526

1

Low Powerand Signal

Thin WallPolymer

LFH up to 85�CDEF STAN61-12 Part 25

1 and 2

RadioPolyethylene LFH up to 50�C DEF STAN 3Radio

Frequency(Co�ax) PTFE

FEP

Glass Braid>85�C

DEF STAN61-12 Part 9

NES 517 Part 3

DatabusPolyolefin/

PolyethyleneLFH up to 50�C

Manufacturer'sown

3

Fibre Optic - LFH up to 85�CDEF STAN60-1 Part 2

3

Submersible* Polyethylene Polyethylene up to 50�CDEF STAN02-517 Parts 2and 3

1, 2 and3

Table 4.1 Cable Categories

* For use outside hull of pressure hull

Definition of Groups:

1. Power Cable Conductor cross section 4 mm2 or greater, used for power supply toequipments, or for degaussing.

2. Signal Cable Conductor cross section 2.5 mm2 or less used for information transfer orminor power lighting circuits.

3. Special Cable Co�axial or data cables with defined electrical characteristics at high fre�quencies.


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4.1.2 Cables – Cable Insulation/Sheath Materials

a . Cable materials in common use are listed in Table 4.2, together with somematerials that may be found on older vessels.

b . Materials are selected to give the best compromise in electrical characteristics,environmental resistance to fluids and temperature, and low hazard in case offire or accident.

Material Use Name/Characteristics Remarks

CSP

(alsoCSP[LFH])

Sheath ChlorosulphonatedPolyethylene tough, oilresistant rubber.

Does not meet smoke andtoxicity requirements forshipboard materials. Nolonger acceptable forshipboard use.

EPR Insulation Ethylene Propylene Rubber.Good mechanical strengthand electrical properties.

Meets smoke and toxicityrequirements when coatedwith LFH compound.

LFH Sheath Limited Fire Hazardsheathing compound toDEF STAN 61-12Part 31. Tough, resistant tooil and other fluids.

Meets smoke and toxicityrequirements. There arevarious proprietaryformulations, depending onthe cable type andmanufacturing process.

`Mineral' Insulation Usually magnesium oxide.Excellent fire resistance,needs copper sheath forwater resistance.

MI cable. Used only wherefire or extreme temperatureresistance is required.

PE Sheath andInsulation

Polyethylene. Excellentelectrical properties andmoderate mechanicalstrength.

Best material for waterresistance. Used only inspecial cables inboard, due tolimited fire performance.

PTFE Sheath andInsulation

Polytetrafluoroethylene.Excellent high temperatureinsulation (260�C) Highlyresistant to oil and otherfluids.

Fails toxicity requirement.Only to be used where itsproperties are essential, e.g.gearbox instrumentation orGT module wiring.

PVC Sheath andInsulation

Polyvinyl chloride. Tough,with moderate electricalproperties and temperatureresistant.

Fails smoke and toxicityrequirements. No longeracceptable for shipboard use.

Silicone Insulation Silicone rubber. Moderateelectrical properties, goodtemperature resistance.

Forms insulating ash whenburnt. Used for highly loadedcable or for fire survival.Meets smoke requirementwhen combined with LFHsheath.

Thin Wall Insulation Shorthand for insulation toDEF STAN 61-12 Part 18.Good electrical properties.Radial thickness nominally0.2 mm.

Meets smoke and toxicityrequirements. Variousproprietary formulations.Used as equipment wire or ascores in cable.

Table 4.2 Cable Insulation/Sheath materials


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4.1.3 Cable Selection – Procedure

a . Many factors are to be considered in selecting a cable for a particularapplication and the following stages are to be assessed:

(1) Number of Cores

(a) Initially the number of cores required is to be established with sparecores allocated to give total number of cores required;

(b) As a guide for main run signal cables the spare cores normally are tobe within the range of 10 to 20 per cent of the total at the completionof installation.

(2) Conductor Size

(a) The conductor size will depend on the loading and the volt droplimitations (transient and steady state). To determine the latter it isnecessary to know the final calculated length of cable. In high powerinstallations, full load, allowable overload margin, startingcurrents, maximum prospective fault current, diversity factor,maximum permitted temperature rise and possible growth are to betaken into account. Minimum cable sizes for services from MouldedCase Circuit Breaker (MCCB) are given in DEF STAN 08-109.Excessive sizes of cables are to be avoided in order to minimize cost,weight and bulk. There are exceptions to this general rule however,e.g. supply cable to motors having thermistor protection mayrequire a larger cable than that indicated by the power rating of themotor. DEF STAN 08-109 gives further details.

(3) External Influences

(a) Fixed glands and terminals will influence the type and sizes of cableto be used in certain circumstances;

(b) The physical conditions involved, e.g. type of bends, movement,twisting motion etc. may require the use of flexible or speciallyflexing cables;

(c) The type of insulation and sheathing will depend on the service,ambient temperatures and physical conditions.

(4) Special Conditions

(a) EMC and RF requirements may dictate that screened cables/coresor twisted pairs/triples are to be used. Guidance is given inDEF STAN 59-41 Part 7;

(b) Where connectors are to be used, cables are to be selected from thepreferred list of cables and connector combinations (see BR 4596);

(c) It is imperative that Equipment and System Designers specify inthe Installation Documentation the permissible losses andcharacteristics for interconnecting cables, together with any otherspecial requirements, e.g. circuit integrity in a fire.


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4.1.4 Cable Selection – General

a . Cables are to be selected from the range detailed in DEF STAN 02-512 Parts 2to 8. Whenever possible, cables constructed to DEF STAN 02-526, DEF STAN02-527 or DEF STAN 61-12 Part 25 are to be specified for shipwiring, as thesehave been developed to give greatly reduced levels of toxic fumes, smoke andcorrosive products if burnt while retaining properties of toughness, fluidresistance and long life in normal service.

4.1.5 Cable Selection – Use of Fire Resisting Cable

a . Cable with silicone rubber insulation to DEF STAN 02-527 has some degree ofcircuit integrity in fire test situations and has a higher current rating due to thegreater capability of the material.

b . Because of their higher cost, silicone insulated cables are to be restricted in useto the following services:

(1) Permanently run emergency cables.

(2) Degaussing cables.

(3) Cables for services essential to float and move the ship. (This includescable connecting generators and electrical load centres to the mainswitchboards).

(4) Cables in areas where the ambient temperature would lead to anunacceptable derating of a cable to alternative specifications.

4.1.6 Cable Selection – Special Cables (see Clause 4.1.1)

a . Some circuit requirements lead to cable designs which are not covered in thestandard range. In this case, special cables shall have halogen free internalmaterials appropriate to their characteristics, with an LFH sheath complyingwith the requirements of DEF STAN 61-12 Part 31.

4.1.7 Cable Selection – Radio Frequency (RF) Cable

a . RF cables are to be selected from DEF STAN 02-512 Part 5.

NOTE Screened coaxial (i.e. tri�axial) cables are not to be used for sync and videocircuits carrying pulses in the intermediate voltage range up to 30 volts,since normal coaxial cables are adequate in this region. Where additionalscreening is required, either for sensitive or high power circuits, then solidmetal outer cables are preferred. Advice and guidance on the selection ofthese cables is to be obtained from WSA/MLSIPT/MLS2.

b . For rigid co-axial transmission lines, select in accordance with the instructionsin DEF STAN 59-6.

4.1.8 Cable Selection – Submarines

a . The criteria for the selection of cables in Submarines is to be the same as for HMSurface Ships. Particular requirements are:

(1) Power cables in the main ac and dc systems down to load centre level, andcables for degaussing coils shall be silicone�rubber insulated as specifiedin DEF STAN 02-527;


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(2) Circuits that are vital for Submarine safety and that have a fire resistancerequirement shall have cable to DEF STAN 02-527;

(3) Wherever possible, cables external to the pressure hull are to bePolyethylene (PE) insulated and sheathed;

(4) All other cables shall be constructed to DEF STAN 02-526 or DEF STAN61-12 Part 25 as appropriate (see Clause 4.1.4). Where cables transitpressure�tight bulkheads or the pressure hull, penetrators and glands toDEF STAN 02-524 Parts 1, 2 and 3 are to be used.

NOTE 1. Some special cable designs also defined in DEF STAN 02-525 and DEFSTAN 02-643.

2. Pressure tight cable was used to transit bulkheads in some olderSubmarine designs. Details of this obsolescent cable can be obtained fromWSA/MLSIPT/MLS2.

5. CORPORATE EXPERIENCE & KNOWLEDGE



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ANNEX A.

RELATED DOCUMENTS

A1. The following documents and publications are referred to in this standard:

DEF STAN 02-512 Pt 2






(NES 512 )

Part 2: Cables, Electrical, Silicone Rubber Insulated, LimitedFire Hazard (LFH) or Chlorosulphonated Polyethylene (CSP)Sheathed for General Service

Part 3: Cables, Electrical, Ethylene Propylene (EP)Rubber Insulated and Halogen Free RubberInsulated, Limited Free Hazard (LFH) orChlorosulphonated Polyethylene (CSP) Sheathedfor General Services

Part 5: Cables, Electrical, Radio Frequency (RF)

Part 6: Cables, Electrical, Miniature and Sub-miniatureand Equipment Wires

Part 7: Cables and Wires, Electrical, Miscellaneous forSpecial Services

Part 8: Cables, Electrical, Thin Wall Insulated, LimitedFire Hazard (LFH)for General Service

Guide to Cables, Electrical and Associated Items



(NES 517)

Part 2: Polyolefin Insulated

Part 3: Co�axial

Requirements for Cables, Electric




(NES 524)

Part 1: Pressure Hull Glands

Part 2: Pressure Equipment and Disc Seal Glands

Part 3: Bulkhead Penetrators and Gland Tubes

Guide to the Selection of Cable Glands for Use in Submarines

DEF STAN 02-525

(NES 525)

Requirements for Thin�wall Insulated, Limited Fire Hazard(LFH)

DEF STAN 02-526

(NES 526)

Requirements for Cables, Electric Rubber Insulated LimitedFire Hazard Sheathed for General Services.

DEF STAN 02-527

(NES 527)

Requirements for Cables, Electric, Fire Survival, HighTemperature Zones and Limited Fire Hazard Sheathed.

DEF STAN 08-109

(NES 532)

Guide to the Design of Electrical Supply and DistributionSystems in Surface Ships.

DEF STAN 02-643

(NES 643)

Requirements for Cables, Electrical, Sub�miniature and SmallMulticore Limited Fire Hazard for Special Purposes.

DEF STAN 59-6 Lines, Radio Frequency Transmission (Rigid Co�axial)

DEF STAN 59�41 Electromagnetic Compatibility:

Part 7: Code of Practice for HM Ships - InstallationGuidelines.

DEF STAN 60�1 Cables, Fibre Optic.

Part 2: Cables, Fibre Optics Limited Fire Hazard forMarine Applications


13

DEF STAN 61�12 Wires, Cords and Cables, Electrical - Metric Units:

Part 9: Cables, Radio Frequency including Limited FireHazard (LFH) Variants

Part 18: Equipment Wires, Limited Fire Hazard (LFH);

Part 25: Cables Electrical Limited Fire Hazard (LFH) up to10 mm2 (cross sectional area);

Part 31: Sheaths Limited Fire Hazard (LFH).

BR 4596 Electrical Connectors Pattern 608.

JSP 430 MOD Ship Safety Management System Handbook


14

ANNEX B.

ABBREVIATIONS

B1. For the purposes of this standard the following Abbreviations apply:

BR Book of Reference

CSP Chlorosulphonated Polyethylene

DEF STAN Defence Standard

DLO Defence Logistics Organization

DPA Defence Procurement Agency

EMC Electromagnetic Compatibility

EP Ethylene Propylene

EPR Ethylene Propylene Rubber

JSP Joint Services Publication

LFH Limited Fire Hazard

MOD Ministry of Defence

NSN Nato Stock Number

NATO North Atlantic Treaty Organization

NES Naval Engineering Standard

MCCB Moulded Case Circuit Breaker

MLSIPT Marine Electrical Systems Integrated Project Team

PE Polyethylene

PTFE Polytetrafluorethylene

PVC Polyvinyl Chloride

RF Radio Frequency

WSA Warships Support Agency


15

ALPHABETICAL INDEX

(Note: Page numbers are given)

CCable

categories, 7external to pressure hull, 10insulation/sheath materials, 8penetrators, 10Selection, conductor size, 9Selection, external influences, 9Selection, general, 10Selection, non pressure tight, 10Selection, number of cores, 9Selection, polyethylene, 10Selection, pressure tight, 10Selection, procedure, 9Selection, radio frequency, 10Selection, silicone rubber insulated, 10Selection, special conditions, 9Selection, submarines, 10

Inside Rear Cover

© Crown Copyright 2002

Copying Only as Agreed with DStan

Defence Standards are Published by and Obtainable from:

Defence Procurement AgencyAn Executive Agency of The Ministry of Defence

UK Defence StandardizationKentigern House65 Brown Street

GLASGOW G2 8EX

DStan Helpdesk

Tel 0141 224 2531/2 Fax 0141 224 2503

Internet e-mail [email protected]

File Reference

The DStan file reference relating to work on this standard is D/DStan/69/02/512 Pt 1.

Contract Requirements

When Defence Standards are incorporated into contracts users are responsible for their correctapplication and for complying with contractual and statutory requirements. Compliance witha Defence Standard does not in itself confer immunity from legal obligations.

Revision of Defence Standards

Defence Standards are revised as necessary by up issue or amendment. It is important thatusers of Defence Standards should ascertain that they are in possession of the latest issue oramendment. Information on all Defence Standards is contained in Def Stan 00-00 Standardsfor Defence Part 3 , Index of Standards for Defence Procurement Section 4 ‘Index of DefenceStandards and Defence Specifications’ published annually and supplemented regularly byStandards in Defence News (SID News). Any person who, when making use of a DefenceStandard encounters an inaccuracy or ambiguity is requested to notify the Directorate ofStandardization (DStan) without delay in order that the matter may be investigated andappropriate action taken.

nes 512

Documents

limited free hazard

nato stock numbers

limited fire hazard

corporate experience

defence logistics organization

thin wall insulated

silicone rubber insulated

hm surface ships