EN 62287-1:2011

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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 (IEC 62287-1:2010)
Navigations- und Funkkommunikationsgeräte und -systeme für die Seeschifffahrt -
Geräte der Klasse B des automatischen Identifikationssystems (AIS) für Schiffe - Teil 1:
Zeitmultiplex-Vielfachzugriffstechniken mit Aktivitätserkennung (CSTDMA) (IEC 62287-
1:2010)
Matériels et systèmes de navigation et de radiocommunications maritimes -
Transpondeur embarqué du système d'identification automatique (AIS) de classe B -
Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute de
porteuse (CSTDMA) (CEI 62287-1:2010)
Ta slovenski standard je istoveten z: EN 62287-1:2011
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62287-1
NORME EUROPÉENNE
January 2011
EUROPÄISCHE NORM
ICS 47.020.70 Supersedes EN 62287-1:2006

English version
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
(IEC 62287-1:2010)
Matériels et systèmes de navigation et de Navigations- und
radiocommunications maritimes - Funkkommunikationsgeräte und -systeme
Transpondeur embarqué du système für die Seeschifffahrt -
d'identification automatique (AIS) de Geräte der Klasse B des automatischen
classe B - Identifikationssystems (AIS) für Schiffe -
Partie 1: Technique d'accès multiple par Teil 1: Zeitmultiplex-
répartition dans le temps avec écoute de Vielfachzugriffstechniken mit
porteuse (CSTDMA) Aktivitätserkennung (CSTDMA)
(CEI 62287-1:2010) (IEC 62287-1:2010)

This European Standard was approved by CENELEC on 2011-01-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62287-1:2011 E
Foreword
The text of document 80/605/FDIS, future edition 2 of IEC 62287-1, prepared by IEC TC 80, Maritime
navigation and radiocommunication equipment and systems, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 62287-1 on 2011-01-01.
This European Standard supersedes EN 62287-1:2006.
The major technical changes with respect to EN 62287-1:2006 are the following. The reference to the
relevant recommendation of the ITU has been updated from M.1371-1 to M.1371-4 with some
consequential small changes. A previous option of providing short safety-related messages in 6.5.1.5 has
been removed on advice from the IMO. A new requirement for a default MMSI has been added in 6.4 and
a further new requirement for protection from invalid control commands has been added in 6.8. Some test
methods have been updated and, in particular, small revisions have been made to the frequencies used
for testing in some of the test methods. The introduction has been deleted since it is only of historic
interest.
Some editorial rearrangement has been made.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62287-1:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO 9000 NOTE  Harmonized as EN ISO 9000.
__________
- 3 - EN 62287-1:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60945 2002 Maritime navigation and radiocommunication EN 60945 2002
equipment and systems - General
requirements - Methods of testing and
required test results
IEC 61108 Series Maritime navigation and radiocommunication EN 61108 Series
equipment and systems - Global navigation
satellite systems (GNSS)
IEC 61162 Series Maritime navigation and radiocommunication EN 61162-1 Series
equipment and systems - Digital interfaces

IEC 61993-2 - Maritime navigation and radiocommunication EN 61993-2 -
equipment and systems - Automatic
Identification Systems (AIS) -
Part 2: Class A shipborne equipment of the
universal automatic identification system (AIS)
- Operational and performance requirements,
methods of test and required test results

IEC 62320-1 - Maritime navigation and radiocommunication EN 62320-1 -
equipment and systems - Automatic
Identification Systems (AIS) -
Part 1: AIS Base Stations - Minimum
operational and performance requirements,
methods of testing and required test results

IMO MSC.140(76) - Recommendation for the protection of the AIS - -
VHF data link
ITU-R - Digital selective-calling system for use in the - -
Recommendation maritime mobile service
M.493-13
ITU-R - Characteristics of a transponder system - -
Recommendation using digital selective calling techniques for
M.825-3 use with vessel traffic services and ship-to-
ship identification
ITU-R - Interim solutions for improved efficiency in the - -
Recommendation use of the band 156-174 MHz by stations in
M.1084-4 the maritime mobile service

ITU-R - Technical characteristics for an automatic - -
Recommendation identification system using time-division
M.1371-4 multiple access in the VHF maritime mobile
band
Publication Year Title EN/HD Year

ITU Radio - Table of transmitting frequencies in the VHF - -
Regulations, maritime mobile band
Appendix 18
IEC 62287-1 ®
Edition 2.0 2010-11
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
PRICE CODE
XD
ICS 47.020.70 ISBN 978-2-88912-257-8
– 2 – 62287-1 ã IEC:2010(E)
CONTENTS
FOREW ORD . 7
1 Sc o pe . 9
2 Normative references . 9
3 Abbreviations . 10
4 General requirements . 11
4.1 General . 11
4.1.1 Capabilities of the Class B“CS” AIS. 11
4.1.2 Quality assurance . 12
4.1.3 Safety of operation . 12
4.1.4 Additional features . 12
4.1.5 Modes of operation. 12
4.2 Manuals . 13
4.3 Marking and identification . 13
5 Environmental, power supply, interference and safety requirements. 13
6 Performance requirements. 14
6.1 Composition . 14
6.2 Operating frequency channels . 14
6.3 GNSS receiver for position reporting . 14
6.4 Identification . 15
6.5 AIS information . 15
6.5.1 Information content . 15
6.5.2 Information reporting intervals . 16
6.5.3 Permissible initialisation period. 17
6.6 Alarms and indications, fall-back arrangements . 17
6.6.1 Integrity and protection . 17
6.6.2 Transmitter shutdown procedure . 17
6.6.3 Position sensor fallback conditions. 17
6.6.4 SOG/COG sensor fallback conditions . 19
6.7 User interface . 19
6.7.1 Indicators and display . 19
6.7.2 Static data input . 19
6.7.3 External interfaces . 19
6.8 Protection from invalid control commands . 19
7 Technical requirements . 20
7.1 General . 20
7.2 Physical layer . 20
7.2.1 General . 20
7.2.2 Transceiver characteristics . 21
7.2.3 Transmitter requirements . 22
7.2.4 Receiver requirements . 22
7.3 Link layer . 23
7.3.1 General . 23
7.3.2 Link sublayer 1: Medium access control (MAC) . 23
7.3.3 Link sublayer 2: Data Link Service (DLS) . 26
7.3.4 Link sublayer 3: Link management entity (LME) . 30

62287-1 ã IEC:2010(E) – 3 –
7.4 Network layer . 39
7.4.1 General . 39
7.4.2 Dual channel operation . 39
7.4.3 Channel management . 40
7.4.4 Distribution of transmission packets . 40
7.4.5 Data link congestion resolution . 40
7.5 Transport layer . 40
7.5.1 General . 40
7.5.2 Transmission packets . 41
7.5.3 Sequencing of data packets . 41
7.6 Digital selective calling (DSC) . 41
8 Test conditions . 41
8.1 General . 41
8.2 Normal and extreme test conditions . 41
8.2.1 Normal test conditions . 41
8.2.2 Extreme test conditions. 41
8.3 Test signals . 41
8.3.1 Standard test signal number 1 . 42
8.3.2 Standard test signal number 2 . 42
8.3.3 Standard test signal number 3 . 42
8.3.4 Standard test signal number 4 . 42
8.3.5 Standard test signal number 5 . 42
8.4 Test arrangements . 43
8.4.1 Standard test environment . 43
8.4.2 Modes of operation of the transmitter . 44
8.4.3 Common test conditions for protection from invalid controls . 44
8.4.4 Measurement uncertainties . 44
9 Power supply, environmental and EMC tests . 45
9.1 Test summary . 45
9.2 Vibration/shock . 46
9.2.1 Vibration . 46
9.2.2 Shock . 46
9.3 Performance tests/checks . 46
9.4 Undervoltage test (brown out) . 47
9.4.1 Purpose . 47
9.4.2 Method of test . 47
9.4.3 Required result . 47
10 Operational tests . 47
10.1 General . 47
10.1.1 Quality assurance . 47
10.1.2 Safety of operation . 47
10.1.3 Additional features . 47
10.2 Modes of operation . 48
10.2.1 Autonomous mode . 48
10.2.2 Assigned mode . 49
10.2.3 Polled mode/interrogation response . 50
10.3 Messages extending one time period . 51
10.3.1 Method of measurement . 51
10.3.2 Required results . 51

– 4 – 62287-1 ã IEC:2010(E)
10.4 Channel selection . 51
10.4.1 Valid channels . 51
10.4.2 Invalid channels . 51
10.5 Internal GNSS receiver . 51
10.6 AIS information . 52
10.6.1 Information content . 52
10.6.2 Information update rates . 53
10.7 Initialisation period . 54
10.7.1 Method of measurement . 54
10.7.2 Required results . 54
10.8 Alarms and indications, fall-back arrangements . 54
10.8.1 Built-in integrity test . 55
10.8.2 Transceiver protection . 55
10.8.3 Transmitter shutdown procedure . 55
10.8.4 Position sensor fallback conditions. 55
10.8.5 Speed sensors . 56
10.9 User interface . 56
10.9.1 Display . 56
10.9.2 Message display . 56
10.9.3 Static data input . 57
10.9.4 External interfaces . 57
11 Physical tests . 57
11.1 TDMA transmitter . 57
11.1.1 Frequency error . 57
11.1.2 Carrier power . 58
11.1.3 Transmission spectrum . 59
11.1.4 Modulation accuracy . 60
11.1.5 Transmitter output power versus time function . 61
11.2 TDMA receivers . 62
11.2.1 Sensitivity . 62
11.2.2 Error behaviour at high input levels . 62
11.2.3 Co-channel rejection. 63
11.2.4 Adjacent channel selectivity . 64
11.2.5 Spurious response rejection . 64
11.2.6 Intermodulation response rejection . 67
11.2.7 Blocking or desensitisation . 68
11.3 Conducted spurious emissions . 69
11.3.1 Spurious emissions from the receiver . 69
11.3.2 Spurious emissions from the transmitter . 69
12 Specific tests of link layer . 70
12.1 TDMA synchronisation . 70
12.1.1 Synchronisation test sync mode 1 . 70
12.1.2 Synchronisation test sync mode 2 . 71
12.1.3 Synchronisation test with UTC . 71
12.2 Carrier-sense tests . 71
12.2.1 Threshold level . 71
12.2.2 Carrier-sense timing . 73
12.3 VDL state/reservations . 74
12.3.1 Method of measurement . 74

62287-1 ã IEC:2010(E) – 5 –
12.3.2 Required results . 74
12.4 Data encoding (bit stuffing) . 74
12.4.1 Method of measurement . 74
12.4.2 Required results . 74
12.5 Frame check sequence . 74
12.5.1 Method of measurement . 74
12.5.2 Required results . 74
12.6 Slot allocation (channel access protocol) . 74
12.6.1 Autonomous mode allocation . 74
12.6.2 DSC listening periods . 75
12.7 Assigned operation . 75
12.7.1 Assignment priority . 75
12.7.2 Entering rate assignment . 75
12.7.3 Reverting from rate assignment . 76
12.7.4 Reverting from quiet mode . 76
12.7.5 Retry of interrogation response . 76
12.8 Message formats. 76
12.8.1 Received messages . 76
12.8.2 Transmitted messages . 77
13 Specific tests of network layer. 77
13.1 Regional area designation by VDL message . 77
13.1.1 Method of measurement . 77
13.1.2 Required results . 78
13.2 Regional area designation by serial message or manually . 78
13.2.1 Method of measurement . 78
13.2.2 Required result . 78
13.3 Management of received regional operating settings . 78
13.3.1 Replacement or erasure of dated or remote regional operating
settings . 78
13.3.2 Channel management by addressed Message 22 . 79
13.3.3 Invalid regional operating areas . 79
13.3.4 Continuation of autonomous mode reporting rate . 80
13.3.5 Other conditions . 80
Annex A (informative) Results of computer simulations and testing of CSTDMA
technology . 81
Annex B (informative) Description of the system . 84
Annex C (normative) DSC channel management . 85
Annex D (informative) Channel management regions . 92
Bibliography . 93

Figure 1 – OSI layer model . 20
Figure 2 – Carrier-Sense timing . 24
Figure 3 – Power versus time mask . 25
Figure 4 – Transmission packet . 26
Figure 5 – Training sequence . 28
Figure 6 – Transmission timing . 30
Figure 7 – Example for CSTDMA access . 31
Figure 8 – Format for repeating four-packet cluster . 42

– 6 – 62287-1 ã IEC:2010(E)
Figure 9 – Measurement arrangement for carrier power . 58
Figure 10 – Emission mask . 59
Figure 11 – Measurement arrangement for modulation accuracy . 60
Figure 12 – Measurement arrangement. 62
Figure 13 – Measurement arrangement with two generators. 63
Figure 14 – SINAD or PER/BER measuring equipment . 65
Figure 15 – Measurement arrangement for intermodulation . 67
Figure 16 – Configuration for carrier-sense threshold test . 72
Figure 17 – Regional area scenario . 77
Figure A.1 – Effect on Class A AIS messages of Class B messages . 81
Figure A.2 – Reception of messages by Class A AIS . 82
Figure A.3 – Reception of messages by Class B AIS . 82
Figure A.4 – Range achieved by a Class A AIS from Class B AIS . 83
Figure D.1 – Channel management regions used for test given in 13.3.1 . 92

Table 1 – Position sensor fallback conditions . 18
Table 2 – Use of accuracy (PA) flag . 18
Table 3 – Transceiver characteristics . 21
Table 4 – Transmitter parameters . 22
Table 5 – Receiver parameters . 23
Table 6 – Definition of timings for Figure 3 . 25
Table 7 – Start-buffer . 27
Table 8 – Summary of the transmission packet . 29
Table 9 – Transmission timing . 29
Table 10 – Access parameters . 31
Table 11 – Use of VDL messages by a Class B”CS” AIS . 34
Table 12 – Number of data bits for use with Message 14 . 35
Table 13 – Contents of Message 18 . 36
Table 14 – Message 24 Part A . 37
Table 15 – Message 24 Part B . 37
Table 16 – Contents of Message 23 . 38
Table 17 – Reporting Interval Settings for use with Message 23 . 39
Table 18 – Channel management . 40
Table 19 – Content of first two packets . 42
Table 20 – Fixed PRS data derived from ITU-T.O.153 . 43
Table 21 – Test summary . 45
Table 22 – Peak frequency deviation versus time. 61
Table 23 – Frequencies for inter-modulation test . 68
Table 24 – Required threshold test results . 73
Table 25 – Required carrier-sense timing results . 73
Table 26 – Required channels in use . 78
Table C.1 – DSC monitoring times. 86

62287-1 ã IEC:2010(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62287-1 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
This second edition cancels and replaces the first edition published in 2006, and constitutes a
technical revision.
The major technical changes with respect to the first edition are the following. The reference
to the relevant recommendation of the ITU has been updated from M.1371-1 to M.1371-4 with
some consequential small changes. A previous option of providing short safety-related
messages in 6.5.1.5 has been removed on advice from the IMO. A new requirement for a
default MMSI has been added in 6.4 and a further new requirement for protection from invalid
control commands has been added in 6.8. Some test methods have been updated and, in

– 8 – 62287-1 ã IEC:2010(E)
particular, small revisions have been made to the frequencies used for testing in some of the
test methods. The introduction has been deleted since it is only of historic interest.
Some editorial rearrangement has been made.
The text of this standard is based on the following documents:
FDIS Report on voting
80/605/FDIS 80/608/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 62287 series published under the general title Maritime navigation
and radiocommunication equipment and systems – Class B shipborne equipment of the
automatic identification system (AIS), can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
 reconfirmed,
 withdrawn,
 replaced by a revised edition, or
 amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
62287-1 ã IEC:2010(E) – 9 –
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
1 Scope
This part of IEC 62287 specifies the minimum operational and performance requirements,
methods of testing and required test results for Class B shipborne AIS equipment using
CSTDMA techniques. This standard 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.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60945:2002, Maritime navigation and radiocommunication equipment and systems –
General requirements – Methods of testing and required test results
IEC 61108 (all parts), Maritime navigation and radiocommunication equipment and systems –
Global navigation satellite systems (GNSS)
IEC 61162 (all parts), Maritime navigation and radiocommunication equipment and systems –
Digital interfaces
IEC 61993-2, Maritime navigation and radiocommunication equipment and systems –
Automatic identification systems (AIS) – Part 2: Class A shipborne equipment of the universal
automatic identification system (AIS) – Operational and performance requirements, methods
of test and required test results
IEC 62320-1, Maritime navigation and radiocommunication equipment and systems –
Automatic identification systems (AIS) – Part 1: AIS Base Stations – Minimum operational and
performance requirements, methods of testing and required test results
IMO MSC.140(76), Recommendation for the protection of the AIS VHF data link
ITU-R Recommendation M.493-13, Digital selective-calling system for use in the maritime
mobile service
ITU-R Recommendation M.825-3, Characteristics of a transponder system using digital
selective calling techniques for use with vessel traffic services and ship-to-ship identification

– 10 – 62287-1 ã IEC:2010(E)
ITU-R Recommendation M.1084-4, Interim solutions for improved efficiency in the use of the
band 156-174 MHz by stations in the maritime mobile service
ITU-R Recommendation M.1371-4, Technical characteristics for a universal shipborne
automatic identification system using time division multiple access in the VHF maritime mobile
band
ITU Radio Regulations, Appendix 18, http://www.itu.int/publ/R-REG-RR/en

3 Abbreviations
AIS Automatic Identification System
BER Bit Error Rate
BT Bandwidth Time product
COG Course Over Ground
CP Candidate Period
CPU Central Processing Unit
CRC Cyclic Redundancy Check
CS Carrier-Sense
CSTDMA Carrier-Sense Time Division Multiple Access
DGNSS Differential Global Navigation Satellite System
DLS Data Link Service
DSC Digital Selective Calling
ECDIS
...