IEC 62287-1:2017

Maritime navigation and radiocommunication equipment and systems - Class B shipborne equiment of the automatic identification system (AIS) - Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

IEC 62287-1:2017 specifies the minimum operational and performance requirements, methods of testing and required test results for Class B shipborne automatic identification system (AIS) equipment using carrier-sense time division multiple access (CSTDMA) techniques. This document takes into account other associated IEC International Standards and existing national standards, as applicable. It is applicable for AIS equipment used on craft that are not covered by the mandatory carriage requirement of AIS under SOLAS Chapter V. An AIS station intended to operate in receive-only mode is not considered a Class B shipborne mobile AIS station. This edition includes the following significant technical change with respect to the previous edition: in the synchronisation method, addition of a direct method for synchronisation from an internal UTC source.

Matériels et systèmes de navigation et de radiocommunication maritimes - Transpondeur embarqué du système d’identification automatique (AIS) de classe B - Partie 1: Techniques d’accès multiple par répartition dans le temps avec écoute de porteuse (CSTDMA)

L’IEC 62287-1:2017 spécifie les exigences minimales opérationnelles et de performance, les méthodes d’essai et les résultats d’essai exigés pour le transpondeur embarqué du système d’identification automatique (AIS) de classe B utilisant les techniques d’accès multiple par répartition dans le temps avec détection de la porteuse (AMRTDP). Le présent document prend en compte d’autres Normes internationales IEC associées et des normes nationales existantes, selon le cas. Il s’applique aux matériels AIS utilisés sur le navire, qui ne sont pas visés par l’exigence relative aux AIS de bord obligatoires selon le Chapitre V de la convention SOLAS. Une station AIS conçue pour fonctionner en mode réception uniquement n’est pas considérée comme une station AIS mobile embarquée de Classe B.

General Information

• Status: Published
• Publication Date: 04-Apr-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 11.040.50 - Radiographic equipment
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: TC 80 - Maritime navigation and radiocommunication equipment and systems
• Drafting Committee: WG 15 - TC 80/WG 15
• Current Stage: PPUB - Publication issued
• Start Date: 21-Apr-2017
• Completion Date: 05-Apr-2017

Relations

• Amended By: IEC 62287-1:2017/AMD1:2022 - Amendment 1 - Maritime navigation and radiocommunication equipment and systems - Class B shipborne equipment of the automatic identification system (AIS) - Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
• Effective Date: 05-Sep-2023
• Revises: IEC 62287-1:2010/AMD1:2013 - Amendment 1 - Maritime navigation and radiocommunication equipment and systems - Class B shipborne equipment of the automatic identification system (AIS) - Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
• Effective Date: 05-Sep-2023
• Revises: IEC 62287-1:2010 - Maritime navigation and radiocommunication equipment and systems - Class B shipborne equipment of the automatic identification system (AIS) - Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62287-1 ®
Edition 3.0 2017-04
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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IEC 62287-1 ®
Edition 3.0 2017-04
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B

shipborne equipment of the automatic identification system (AIS) –

Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.70 ISBN 978-2-8322-4152-3

– 2 – IEC 62287-1:2017  IEC 2017
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviated terms . 12
3.1 Terms and definitions . 12
3.2 Abbreviated terms . 12
4 General requirements . 13
4.1 General . 13
4.1.1 Capabilities of the Class B "CS" AIS . 13
4.1.2 Quality assurance . 13
4.1.3 Safety of operation . 14
4.1.4 Additional features . 14
4.1.5 Modes of operation . 14
4.2 Manuals . 15
4.3 Marking and identification . 15
5 Environmental, power supply, interference and safety requirements . 15
6 Performance requirements. 16
6.1 Composition . 16
6.2 Operating frequency channels . 16
6.3 GNSS receiver for position reporting . 16
6.4 Identification . 17
6.5 AIS information . 17
6.5.1 Information content . 17
6.5.2 Information reporting intervals . 18
6.5.3 Permissible initialisation period . 18
6.6 Alarms and indications, fall-back arrangements . 18
6.6.1 Integrity and protection . 18
6.6.2 Transmitter shutdown procedure . 19
6.6.3 Position sensor fallback conditions . 19
6.6.4 SOG/COG sensor fallback conditions . 20
6.7 User interface . 20
6.7.1 Indicators and display . 20
6.7.2 Static data input . 20
6.7.3 External interfaces . 20
6.8 Protection from invalid control commands . 21
7 Technical requirements . 21
7.1 General . 21
7.2 Physical layer . 22
7.2.1 General . 22
7.2.2 Transceiver characteristics . 22
7.2.3 Transmitter requirements . 24
7.2.4 Receiver requirements . 24
7.3 Link layer . 25
7.3.1 General . 25

7.3.2 Link sublayer 1: Medium access control (MAC) . 25
7.3.3 Link sublayer 2: Data Link Service (DLS) . 28
7.3.4 Link sublayer 3: Link management entity (LME) . 33
7.4 Network layer . 41
7.4.1 General . 41
7.4.2 Dual channel operation . 41
7.4.3 Channel management . 42
7.4.4 Distribution of transmission packets . 42
7.4.5 Data link congestion resolution . 42
7.5 Transport layer . 42
7.5.1 General . 42
7.5.2 Transmission packets . 43
7.5.3 Sequencing of data packets . 43
7.6 Digital selective calling (DSC) . 43
8 Test conditions . 43
8.1 General . 43
8.2 Normal and extreme test conditions . 43
8.2.1 Normal test conditions . 43
8.2.2 Extreme test conditions . 43
8.3 Test signals . 43
8.3.1 Standard test signal number 1 . 44
8.3.2 Standard test signal number 2 . 44
8.3.3 Standard test signal number 3 . 44
8.3.4 Standard test signal number 4 . 44
8.3.5 Standard test signal number 5 . 44
8.4 Test arrangements . 45
8.4.1 Standard test environment . 45
8.4.2 Modes of operation of the transmitter. 46
8.4.3 Common test conditions for protection from invalid controls . 46
8.4.4 Measurement uncertainties . 46
9 Power supply, environmental and EMC tests . 47
9.1 Test summary . 47
9.2 Vibration/shock . 49
9.2.1 Vibration . 49
9.2.2 Shock . 49
9.3 Performance tests/checks . 49
9.4 Undervoltage test (brown out) . 50
9.4.1 Purpose . 50
9.4.2 Method of test. 50
9.4.3 Required result . 50
10 Operational tests . 50
10.1 General . 50
10.1.1 Quality assurance . 50
10.1.2 Safety of operation . 50
10.1.3 Additional features . 50
10.2 Modes of operation . 51
10.2.1 Autonomous mode .
...

IEC 62287-1 ®
Edition 3.0 2017-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
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details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62287-1 ®
Edition 3.0 2017-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B

shipborne equipment of the automatic identification system (AIS) –

Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.70 ISBN 978-2-8322-4217-9

– 2 – IEC 62287-1:2017 RLV  IEC 2017
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviated terms . 12
3.1 Terms and definitions . 12
3.2 Abbreviated terms . 12
4 General requirements . 14
4.1 General . 14
4.1.1 Capabilities of the Class B "CS" AIS . 14
4.1.2 Quality assurance . 14
4.1.3 Safety of operation . 14
4.1.4 Additional features . 14
4.1.5 Modes of operation . 15
4.2 Manuals . 15
4.3 Marking and identification . 15
5 Environmental, power supply, interference and safety requirements . 16
6 Performance requirements. 16
6.1 Composition . 16
6.2 Operating frequency channels . 17
6.3 GNSS receiver for position reporting . 17
6.4 Identification . 17
6.5 AIS information . 18
6.5.1 Information content . 18
6.5.2 Information reporting intervals . 19
6.5.3 Permissible initialisation period . 19
6.6 Alarms and indications, fall-back arrangements . 19
6.6.1 Integrity and protection . 19
6.6.2 Transmitter shutdown procedure . 19
6.6.3 Position sensor fallback conditions . 20
6.6.4 SOG/COG sensor fallback conditions . 21
6.7 User interface . 21
6.7.1 Indicators and display . 21
6.7.2 Static data input . 21
6.7.3 External interfaces . 21
6.8 Protection from invalid control commands . 21
7 Technical requirements . 22
7.1 General . 22
7.2 Physical layer . 22
7.2.1 General . 22
7.2.2 Transceiver characteristics . 22
7.2.3 Transmitter requirements . 24
7.2.4 Receiver requirements . 24
7.3 Link layer . 25
7.3.1 General . 25

7.3.2 Link sublayer 1: Medium access control (MAC) . 25
7.3.3 Link sublayer 2: Data Link Service (DLS) . 28
7.3.4 Link sublayer 3: Link management entity (LME) . 33
7.4 Network layer . 41
7.4.1 General . 41
7.4.2 Dual channel operation . 41
7.4.3 Channel management . 42
7.4.4 Distribution of transmission packets . 42
7.4.5 Data link congestion resolution . 42
7.5 Transport layer . 42
7.5.1 General . 42
7.5.2 Transmission packets . 43
7.5.3 Sequencing of data packets . 43
7.6 Digital selective calling (DSC) . 43
8 Test conditions . 43
8.1 General . 43
8.2 Normal and extreme test conditions . 43
8.2.1 Normal test conditions . 43
8.2.2 Extreme test conditions . 43
8.3 Test signals . 44
8.3.1 Standard test signal number 1 . 44
8.3.2 Standard test signal number 2 . 44
8.3.3 Standard test signal number 3 . 44
8.3.4 Standard test signal number 4 . 44
8.3.5 Standard test signal number 5 . 44
8.4 Test arrangements . 45
8.4.1 Standard test environment . 45
8.4.2 Modes of operation of the transmitter. 46
8.4.3 Common test conditions for protection from invalid controls . 46
8.4.4 Measurement uncertainties . 46
9 Power supply, environmental and EMC tests . 47
9.1 Test summary . 47
9.2 Vibration/shock . 49
9.2.1 Vibration . 49
9.2.2 Shock . 49
9.3 Performance tests/checks . 49
9.4 Undervoltage test (brown out) . 50
9.4.1 Purpose . 50
9.4.2 Method of test. 50
9.4.3 Required result . 50
10 Operational tests . 50
10.1 General . 50
10.1.1 Quality assurance . 50
10.1.2 Safety of operation . 50
10.1.3 Additional features . 50
10.2 Modes of operation . 51
10.2.1 Autonomous mode
...

IEC 62287-1 ®
Edition 3.1 2022-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems –
Class B shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
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The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62287-1 ®
Edition 3.1 2022-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems –
Class B shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.70 ISBN 978-2-8322-6128-6

IEC 62287-1 ®
Edition 3.1 2022-11
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Maritime navigation and radiocommunication equipment and systems –
Class B shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

– 2 – IEC 62287-1:2017+AMD1:2022 CSV
 IEC 2022
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviated terms . 12
3.1 Terms and definitions . 12
3.2 Abbreviated terms . 12
4 General requirements . 13
4.1 General . 13
4.1.1 Capabilities of the Class B "CS" AIS . 13
4.1.2 Quality assurance . 13
4.1.3 Safety of operation . 14
4.1.4 Additional features . 14
4.1.5 Modes of operation . 14
4.2 Manuals . 15
4.3 Marking and identification . 15
5 Environmental, power supply, interference and safety requirements . 15
6 Performance requirements. 16
6.1 Composition . 16
6.2 Operating frequency channels . 16
6.3 GNSS receiver for position reporting . 16
6.4 Identification . 17
6.5 AIS information . 17
6.5.1 Information content . 17
6.5.2 Information reporting intervals . 18
6.5.3 Permissible initialisation period . 18
6.6 Alarms and indications, fall-back arrangements . 18
6.6.1 Integrity and protection . 18
6.6.2 Transmitter shutdown procedure . 19
6.6.3 Position sensor fallback conditions . 19
6.6.4 SOG/COG sensor fallback conditions . 20
6.7 User interface . 20
6.7.1 Indicators and display . 20
6.7.2 Static data input . 20
6.7.3 External interfaces . 20
6.8 Protection from invalid control commands . 21
7 Technical requirements . 21
7.1 General . 21
7.2 Physical layer . 22
7.2.1 General . 22
7.2.2 Transceiver characteristics . 22
7.2.3 Transmitter requirements . 24
7.2.4 Receiver requirements . 24
7.3 Link layer . 25
7.3.1 General . 25

 IEC 2022
7.3.2 Link sublayer 1: Medium access control (MAC) . 25
7.3.3 Link sublayer 2: Data Link Service (DLS) . 28
7.3.4 Link sublayer 3: Link management entity (LME) . 33
7.4 Network layer . 41
7.4.1 General . 41
7.4.2 Dual channel operation . 41
7.4.3 Channel management . 42
7.4.4 Distribution of transmission packets . 42
7.4.5 Data link congestion resolution . 42
7.5 Transport layer . 42
7.5.1 General . 42
7.5.2 Transmission packets . 43
7.5.3 Sequencing of data packets . 43
7.6 Digital selective calling (DSC) . 43
8 Test conditions . 43
8.1 General . 43
8.2 Normal and extreme test conditions . 43
8.2.1 Normal test conditions . 43
8.2.2 Extreme test conditions . 43
8.3 Test signals . 43
8.3.1 Standard test signal number 1 . 44
8.3.2 Standard test signal number 2 . 44
8.3.3 Standard test signal number 3 . 44
8.3.4 Standard test signal number 4 . 44
8.3.5 Standard test signal number 5 . 44
8.4 Test arrangements . 45
8.4.1 Standard test environment . 45
8.4.2 Modes of operation of the transmitter. 46
8.4.3 Common test conditions for protection from invalid controls . 46
8.4.4 Measurement uncertainties . 46
9 Power supply, environmental and EMC tests . 47
9.1 Test summary . 47
9.2 Vibration/shock . 49
9.2.1 Vibration . 49
9.2.2 Shock . 49
9.3 Performance tests/checks . 49
9.4 Undervoltage test (brown out) . 50
9.4.1 Purpose . 50
9.4.2 Method of test. 50
9.4.3 Required result . 50
10 Operational tests . 50
10.1 General . 50
10.1.1 Quality assurance . 50
10.1.2 Safety of operation . 50
10.1.3 Additional features . 50
10.2 Modes of operation . 51
10.2.1 Autonomous mode .
...

IEC 62287-1 ®
Edition 3.0 2017-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

Matériels et systèmes de navigation et de radiocommunication maritimes –
Transpondeur embarqué du système d’identification automatique (AIS) de
classe B –
Partie 1: Techniques d’accès multiple par répartition dans le temps avec écoute
de porteuse (CSTDMA)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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containing more than 22 000 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 18 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

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IEC 62287-1 ®
Edition 3.0 2017-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B

shipborne equipment of the automatic identification system (AIS) –

Part 1: Carrier-sense time division multiple access (CSTDMA) techniques

Matériels et systèmes de navigation et de radiocommunication maritimes –

Transpondeur embarqué du système d’identification automatique (AIS) de

classe B –
Partie 1: Techniques d’accès multiple par répartition dans le temps avec écoute

de porteuse (CSTDMA)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-1039-9

– 2 – IEC 62287-1:2017  IEC 2017
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviated terms . 12
3.1 Terms and definitions . 12
3.2 Abbreviated terms . 12
4 General requirements . 13
4.1 General . 13
4.1.1 Capabilities of the Class B "CS" AIS . 13
4.1.2 Quality assurance . 13
4.1.3 Safety of operation . 14
4.1.4 Additional features . 14
4.1.5 Modes of operation . 14
4.2 Manuals . 15
4.3 Marking and identification . 15
5 Environmental, power supply, interference and safety requirements . 15
6 Performance requirements. 16
6.1 Composition . 16
6.2 Operating frequency channels . 16
6.3 GNSS receiver for position reporting . 16
6.4 Identification . 17
6.5 AIS information . 17
6.5.1 Information content . 17
6.5.2 Information reporting intervals . 18
6.5.3 Permissible initialisation period . 18
6.6 Alarms and indications, fall-back arrangements . 18
6.6.1 Integrity and protection . 18
6.6.2 Transmitter shutdown procedure . 19
6.6.3 Position sensor fallback conditions . 19
6.6.4 SOG/COG sensor fallback conditions . 20
6.7 User interface . 20
6.7.1 Indicators and display . 20
6.7.2 Static data input . 20
6.7.3 External interfaces . 20
6.8 Protection from invalid control commands . 21
7 Technical requirements . 21
7.1 General . 21
7.2 Physical layer . 22
7.2.1 General . 22
7.2.2 Transceiver characteristics . 22
7.2.3 Transmitter requirements . 24
7.2.4 Receiver requirements . 24
7.3 Link layer . 25
7.3.1 General . 25
7.3.2 Link sublayer 1: Medium access control (MAC) . 25

7.3.3 Link sublayer 2: Data Link Service (DLS) . 28
7.3.4 Link sublayer 3: Link management entity (LME) . 33
7.4 Network layer . 41
7.4.1 General . 41
7.4.2 Dual channel operation . 41
7.4.3 Channel management . 42
7.4.4 Distribution of transmission packets . 42
7.4.5 Data link congestion resolution . 42
7.5 Transport layer . 42
7.5.1 General . 42
7.5.2 Transmission packets . 43
7.5.3 Sequencing of data packets . 43
7.6 Digital selective calling (DSC) . 43
8 Test conditions . 43
8.1 General . 43
8.2 Normal and extreme test conditions . 43
8.2.1 Normal test conditions . 43
8.2.2 Extreme test conditions . 43
8.3 Test signals . 43
8.3.1 Standard test signal number 1 . 44
8.3.2 Standard test signal number 2 . 44
8.3.3 Standard test signal number 3 . 44
8.3.4 Standard test signal number 4 .
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