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This part of IEC 61097 specifies the minimum performance requirements, technical characteristics and methods of testing, and required test results, for Automatic Identification Systems (AIS) search and rescue transmitters (AIS-SART) which may be carried by ships as a search and rescue locating device as required by Chapters III and IV of the International Convention for Safety of Life at Sea (SOLAS), as amended. It takes account of IMO resolution A.694(17) and is associated with IEC 60945. When a requirement in this standard is different from IEC 60945, the requirement in this part of IEC 61097 takes precedence.
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IEC 61097-14
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
Global maritime distress and safety system (GMDSS) –
Part 14: AIS search and rescue transmitter (AIS-SART) – Operational and
performance requirements, methods of testing and required test results
IEC 61097-14:2010(E)
®
colour
inside

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IEC 61097-14
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
Global maritime distress and safety system (GMDSS) –
Part 14: AIS search and rescue transmitter (AIS-SART) – Operational and
performance requirements, methods of testing and required test results
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
W
ICS 47.020.70
PRICE CODE
ISBN 2-8318-1078-1
® Registered trademark of the International Electrotechnical Commission
®
colour
inside

– 2 – 61097-14 © IEC:2010(E)
CONTENTS
FOREWORD...........................................................................................................................5
1 Scope...............................................................................................................................7
2 Normative references .......................................................................................................7
3 Performance requirements ...............................................................................................8
3.1 General ...................................................................................................................8
3.2 Operational .............................................................................................................8
3.3 Battery ....................................................................................................................8
3.3.1 General .......................................................................................................9
3.3.2 Battery life and expiry date ..........................................................................9
3.3.3 Reverse polarity protection ..........................................................................9
3.4 Unique identifier (user ID) .......................................................................................9
3.5 Environment ..........................................................................................................10
3.6 Range performance...............................................................................................10
3.7 Transmission performance ....................................................................................10
3.7.1 Active mode ..............................................................................................10
3.7.2 Test Mode .................................................................................................12
3.8 Labelling ...............................................................................................................12
3.9 Manuals ................................................................................................................12
4 Technical requirements ..................................................................................................13
4.1 Functional block diagram of an AIS-SART .............................................................13
4.1.1 General .....................................................................................................13
4.1.2 TDMA transmitter (AIS Tx).........................................................................13
4.1.3 Controller ..................................................................................................13
4.1.4 Timing and synchronisation device ............................................................13
4.1.5 Battery ......................................................................................................14
4.1.6 Electronic position fixing system ................................................................14
4.1.7 Activator ....................................................................................................14
4.1.8 Indicator ....................................................................................................14
4.2 Physical layer requirement ....................................................................................15
4.2.1 Transmitter requirements...........................................................................15
4.3 Link layer requirements .........................................................................................16
4.3.1 General .....................................................................................................16
4.3.2 AIS Messages ...........................................................................................16
4.3.3 Synchronisation .........................................................................................17
4.3.4 VDL access scheme ..................................................................................17
4.3.5 Link sub-layer 1: Medium Access Control (MAC) ....................................... 18
4.3.6 Link sub-layer 2: Data Link Service (DLS) .................................................18
4.3.7 Link sub-layer 3: Link Management Entity (LME) .......................................18
5 General methods of testing.............................................................................................18
5.1 Introduction ...........................................................................................................18
5.2 General requirements............................................................................................ 18
5.2.1 General .....................................................................................................18
5.2.2 Performance check....................................................................................19
5.2.3 Performance test .......................................................................................19
5.3 Normal test conditions...........................................................................................19
5.4 Extreme test conditions .........................................................................................19

61097-14 © IEC:2010(E) – 3 –
5.5
Preparation of AIS-SART for type-approval testing ................................................19
5.6 Test signals...........................................................................................................19
5.6.1 Standard test signal number 1 ...................................................................19
5.6.2 Standard test signal number 2 ...................................................................19
5.6.3 Standard test signal number 3 ...................................................................20
5.7 Artificial antenna (dummy load) .............................................................................20
5.8 Facilities for access...............................................................................................20
5.9 Modes of operation of the transmitter ....................................................................20
5.10 Measurement uncertainties ...................................................................................20
6 Performance tests ..........................................................................................................21
6.1 Operational tests ...................................................................................................21
6.2 Battery ..................................................................................................................21
6.2.1 Battery capacity test ..................................................................................21
6.2.2 Expiry date indication ................................................................................22
6.2.3 Reverse polarity protection ........................................................................ 22
6.3 Unique identifier ....................................................................................................22
6.4 Environment ..........................................................................................................22
6.5 Range performance...............................................................................................22
6.6 Transmission performance ....................................................................................22
6.7 Labelling ...............................................................................................................22
6.8 Manuals ................................................................................................................23
6.9 Electronic position fixing system............................................................................23
6.10 Activator................................................................................................................23
6.11 Indicator ................................................................................................................23
7 Physical radio tests ........................................................................................................23
7.1 General description ...............................................................................................23
7.2 Frequency error.....................................................................................................24
7.2.1 Purpose.....................................................................................................24
7.2.2 Method of measurement ............................................................................24
7.2.3 Required results ........................................................................................24
7.3 Conducted power ..................................................................................................24
7.3.1 Purpose.....................................................................................................24
7.3.2 Method of measurement ............................................................................24
7.3.3 Required result..........................................................................................25
7.4 Radiated power .....................................................................................................25
7.4.1 Purpose.....................................................................................................25
7.4.2 Method of measurement ............................................................................25
7.4.3 Required results ........................................................................................26
7.5 Modulation spectrum slotted transmission .............................................................26
7.5.1 Purpose.....................................................................................................26
7.5.2 Method of measurement ............................................................................26
7.5.3 Required results ........................................................................................26
7.6 Transmitter test sequence and modulation accuracy .............................................27
7.6.1 Purpose.....................................................................................................27
7.6.2 Method of measurement ............................................................................27
7.6.3 Required results ........................................................................................28
7.7 Transmitter output power versus time function.......................................................28
7.7.1 Definition ...................................................................................................28
7.7.2 Method of measurement ............................................................................29
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