IEC 61162-1:2016

IEC 61162-1 ®
Edition 5.0 2016-08
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Digital
interfaces –
Part 1: Single talker and multiple listeners

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IEC 61162-1 ®
Edition 5.0 2016-08
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Digital

interfaces –
Part 1: Single talker and multiple listeners

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.70 ISBN 978-2-8322-3605-5

– 2 – IEC 61162-1:2016 RLV © IEC 2016

CONTENTS
FOREWORD . 8

INTRODUCTION . 10

1 Scope . 11

2 Normative references . 11

3 Terms and definitions. 13

3.1 General . 13

3.2 Terms and definitions . 13

4 Manufacturer's documentation . 13
5 Hardware specification . 13
5.1 General . 13
5.2 Interconnecting wire . 13
5.3 Conductor definitions. 13
5.4 Electrical connections/shield requirements . 14
5.5 Connector . 14
5.6 Electrical signal characteristics . 14
5.6.1 General . 14
5.6.2 Signal state definitions . 14
5.6.3 Talker drive circuits . 14
5.6.4 Listener receive circuits . 14
5.6.5 Electrical isolation . 15
5.6.6 Maximum voltage on bus . 15
6 Data transmission . 15
7 Data format protocol . 16
7.1 Characters . 16
7.1.1 General . 16
7.1.2 Reserved characters . 16
7.1.3 Valid characters . 16
7.1.4 Undefined characters . 16
7.1.5 Character symbols . 16
7.2 Fields . 16
7.2.1 String . 16
7.2.2 Address field . 16

7.2.3 Data fields . 17
7.2.4 Checksum field . 18
7.2.5 Sequential message identifier field . 18
7.3 Sentences . 19
7.3.1 General structure . 19
7.3.2 Description of approved sentences . 19
7.3.3 Parametric sentences . 20
7.3.4 Encapsulation sentences. 21
7.3.5 Query sentences . 23
7.3.6 Proprietary sentences . 23
7.3.7 Command sentences . 24
7.3.8 Valid sentences . 25
7.3.9 Multi-sentence messages . 25

7.3.10 Sentence transmission timing . 25

7.3.11 Additions to approved sentences . 25

7.4 Error detection and handling . 26

7.5 Handling of deprecated sentences . 26

8 Data content . 26

8.1 Character definitions . 26

8.2 Field definitions . 28

8.3 Approved sentences . 32

8.3.1 General format . 32

8.3.2 AAM – Waypoint arrival alarm . 32
8.3.3 ABK – AIS addressed and binary broadcast acknowledgement . 32
8.3.4 ABM – AIS addressed binary and safety related message . 33
8.3.5 ACA – AIS channel assignment message . 34
8.3.6 ACK – Acknowledge alarm . 36
8.3.7 ACN – Alert command . 36
8.3.8 ACS – AIS channel management information source . 37
8.3.9 AIR – AIS interrogation request . 37
8.3.10 AKD – Acknowledge detail alarm condition . 38
8.3.11 ALA – Report detailed alarm condition . 39
8.3.12 ALC – Cyclic alert list . 40
8.3.13 ALF – Alert sentence . 41
8.3.14 ALR – Set alarm state . 43
8.3.15 APB – Heading/track controller (autopilot) sentence B . 43
8.3.16 ARC – Alert command refused . 44
8.3.17 BBM – AIS broadcast binary message . 45
8.3.18 BEC – Bearing and distance to waypoint – Dead reckoning. 46
8.3.19 CBR – Configure broadcast rates for AIS AtoN station message
command .
8.3.19 BOD – Bearing origin to destination . 46
8.3.20 BWC – Bearing and distance to waypoint – Great circle . 46
8.3.21 BWR – Bearing and distance to waypoint – Rhumb line . 47
8.3.22 BWW – Bearing waypoint to waypoint . 47
8.3.23 CUR – Water current layer – Multi-layer water current data . 49
8.3.24 DBT – Depth below transducer . 49
8.3.25 DDC – Display dimming control . 49

8.3.26 DOR – Door status detection . 50
8.3.27 DPT – Depth . 51
8.3.28 DSC – Digital selective calling information . 51
8.3.29 DSE – Expanded digital selective calling . 52
8.3.30 DTM – Datum reference . 53
8.3.31 EPV – Command or report equipment property value . 54
8.3.32 ETL – Engine telegraph operation status . 55
8.3.33 EVE – General event message . 56
8.3.34 FIR – Fire detection . 56
8.3.35 FSI – Frequency set information . 57
8.3.36 GBS – GNSS satellite fault detection . 58
8.3.37 GEN – Generic binary information . 60
8.3.38 GFA – GNSS fix accuracy and integrity . 61
8.3.39 GGA – Global positioning system (GPS) fix data . 62

– 4 – IEC 61162-1:2016 RLV © IEC 2016

8.3.40 GLL – Geographic position – Latitude/longitude . 62

8.3.41 GNS – GNSS fix data . 63

8.3.42 GRS – GNSS range residuals . 65

8.3.43 GSA – GNSS DOP and active satellites . 67

8.3.44 GST – GNSS pseudorange noise statistics . 69

8.3.45 GSV – GNSS satellites in view . 70

8.3.46 HBT – Heartbeat supervision sentence . 71

8.3.47 HCR – Heading correction report . 72

8.3.48 HDG – Heading, deviation and variation . 72

8.3.49 HDT – Heading true . 73

8.3.50 HMR – Heading monitor receive . 73
8.3.51 HMS – Heading monitor set . 74
8.3.52 HRM – heel angle, roll period and roll amplitude measurement device . 74
8.3.53 HSC – Heading steering command . 75
8.3.54 HSS – Hull stress surveillance systems . 75
8.3.55 MEB – Message input for broadcast command .
8.3.55 HTC – Heading/track control command; HTD – Heading /track control
data . 75
8.3.56 LR1 – AIS long-range reply sentence 1 . 77
8.3.57 LR2 – AIS long-range reply sentence 2 . 77
8.3.58 LR3 – AIS long-range reply sentence 3 . 78
8.3.59 LRF – AIS long-range function . 78
8.3.60 LRI – AIS long-range interrogation . 79
8.3.61 MOB – Man over board notification . 82
8.3.62 MSK – MSK receiver interface . 83
8.3.63 MSS – MSK receiver signal status . 83
8.3.64 MTW – Water temperature . 84
8.3.65 MWD – Wind direction and speed . 84
8.3.66 MWV – Wind speed and angle . 84
8.3.67 NAK – Negative acknowledgement . 84
8.3.68 NRM – NAVTEX receiver mask . 85
8.3.69 NRX – NAVTEX received message . 86
8.3.70 NSR – Navigation status report . 88
8.3.71 OSD – Own ship data . 89
8.3.72 POS – Device position and ship dimensions report or configuration
command . 90

8.3.73 PRC – Propulsion remote control status . 91
8.3.74 RLM – Return link message . 92
8.3.75 RMA – Recommended minimum specific LORAN-C data . 93
8.3.76 RMB – Recommended minimum navigation information . 93
8.3.77 RMC – Recommended minimum specific GNSS data . 94
8.3.78 ROR – Rudder order status . 95
8.3.79 ROT – Rate of turn. 96
8.3.80 RRT – Report route transfer . 96
8.3.81 RPM – Revolutions . 97
8.3.82 RSA – Rudder sensor angle . 97
8.3.83 RSD – Radar system data . 97
8.3.84 RTE – Routes . 98
8.3.85 SFI – Scanning frequency information . 99

8.3.86 SMI – SafetyNET Message, All Ships/NavArea . 99

8.3.87 SM2 – SafetyNET Message, Coastal Warning Area . 101

8.3.88 SM3 – SafetyNET Message, Circular Area address . 103

8.3.89 SM4 – SafetyNET Message, Rectangular Area Address . 105

8.3.90 SMB – IMO SafetyNET Message Body . 107

8.3.91 SPW – Security password sentence . 109

8.3.92 SSD – AIS ship static data . 110

8.3.93 STN – Multiple data ID . 110

8.3.94 THS – True heading and status . 111

8.3.95 TLB – Target label . 111

8.3.96 TLL – Target latitude and longitude . 111
8.3.97 TRC – Thruster control data . 112
8.3.98 TRL – AIS transmitter-non-functioning log . 113
8.3.99 TRD – Thruster response data . 114
8.3.100 TTD – Tracked target data . 114
8.3.101 TTM – Tracked target message . 116
8.3.102 TUT – Transmission of multi-language text. 117
8.3.103 TXT – Text transmission . 118
8.3.104 UID – User identification code transmission . 119
8.3.105 VBW – Dual ground/water speed . 119
8.3.106 VDM – AIS VHF data-link message . 120
8.3.107 VDO – AIS VHF data-link own-vessel report . 121
8.3.108 VDR – Set and drift . 121
8.3.109 VER – Version . 122
8.3.110 VHW – Water speed and heading . 122
8.3.111 VLW – Dual ground/water distance . 123
8.3.112 VPW – Speed measured parallel to wind . 123
8.3.113 VSD – AIS voyage static data . 123
8.3.114 VTG – Course over ground and ground speed . 124
8.3.115 WAT – Water level detection . 124
8.3.116 WCV – Waypoint closure velocity . 125
8.3.117 WNC – Distance waypoint to waypoint . 126
8.3.118 WPL – Waypoint location . 126
8.3.119 XDR – Transducer measurements . 126
8.3.120 XTE – Cross-track error, measured . 127

8.3.121 XTR – Cross-track error, dead reckoning . 128
8.3.122 ZDA – Time and date . 128
8.3.123 ZDL – Time and distance to variable point . 128
8.3.124 ZFO – UTC and time from origin waypoint . 128
8.3.125 ZTG – UTC and time to destination waypoint . 129
9 Applications . 129
9.1 Example parametric sentences . 129
9.1.1 General . 129
9.1.2 Example 1 – LORAN-C latitude/longitude . 129
9.1.3 Example 2 – LORAN-C arrival alarm . 129
9.1.4 Example 3 – Proprietary sentence . 130
9.1.5 Example 4 – RMA examples. 130
9.1.6 Example 5 – FSI examples . 131
9.1.7 Example 6 – MSK/MSS examples . 131

– 6 – IEC 61162-1:2016 RLV © IEC 2016

9.1.8 Example 7 – DSC and DSE sentences . 131

9.1.9 Example 8 – FIR, DOR and WAT sentences . 132

9.2 Example encapsulation sentences . 132

9.3 Examples of receiver diagrams . 133

Annex A (informative) Glossary . 134

Annex B (normative) Guidelines for methods of testing and required test results . 141

B.1 General . 141

B.2 Definition of environmental conditions for the tests . 141

B.3 Examination of the manufacturer's documentation . 141

B.4 Test of hardware . 142
B.4.1 Interface units . 142
B.4.2 Ability of the input circuits to work with limited current .
B.4.2 Input circuit test . 142
B.4.3 Check of electrical isolation . 142
B.4.4  Ability of input circuits to withstand maximum voltage on the bus
Maximum input voltage test . 142
B.4.5 Test arrangement for performance tests according to IEC 60945 . 142
B.4.6 Test under maximum interface workload . 143
B.4.7 Test against corrupted data at an interface .
B.4.7 Test for correct parsing of sentences . 143
B.4.8 Test under long term conditions . 144
B.4.9 Protocol test of the interface of the EUT . 144
B.4.10 Test for correct use of special characters starting a sentence .
B.4.11 Test for correct parsing of received sentences .
B.4.12 Test for future extension of received sentences .
Annex C (normative) Six-bit binary field conversion . 153
Annex D (normative) Alarm system fields . 156
Annex E (informative) Example of use of FIR, DOR and WAT sentences . 165
E.1 Example of the use of system status messages . 165
E.2 Use of system division codes. 165
E.3 Send complete status . 166
E.4 Change measurement point status . 167
E.5 Point status change during a status update . 167
E.6 Failure in a sub-system . 167
E.7 Status updates when a sub-system is in fault . 168

E.8 Signal a correction of a sub-system fault . 168
Annex F (informative) Example encapsulation sentence. 169
F.1 Example encapsulation sentence . 169
F.2 AIS VHF data-link message VDM sentence encapsulation example . 169
F.3 Background discussion – Encapsulation coding . 169
F.4 Decoding the encapsulated string . 171
F.5 Conversion from symbols to binary bits . 171
F.6 Organising the binary message data . 172
F.7 Interpreting the decoded binary strings . 172
Bibliography . 176

Figure 1 – Listener receive circuit . 15
Figure 2 – Data transmission format . 15

Figure 3 – Example 1, J-FET, N channel, opto-isolator based listener circuit . 133

Figure 4 – Example 2, NPN opto-isolator based listener circuit . 133

Figure C.1 – 6-bit binary code converted to valid IEC 61162-1 character . 154

Figure C.2 – Valid IEC 61162-1 character converted to 6-bit binary code . 155

Figure E.1 – Example system diagram . 166

Figure F.1 – Message data format . 170

Figure F.2 – Work sheet for decoding and interpreting encapsulated string . 175

Table 1 – Reserved characters . 26
Table 2 – Valid characters . 27
Table 3 – Character symbol . 28
Table 4 – Talker identifier mnemonics . 29
Table 5 – Field type summary . 31
Table B.1 – Example – Special characters . 143
Table B.2 – Example – Parsing . 144
Table B.3 – Example – Data string GGA received by the EUT .
Table B.3 – Example – Future extensions . 144
Table B.4 – Example – Data string GGA sent by the EUT to the test receiver (listener) . 146
Table B.5 – Example – Checksum data sent . 147
Table B.6 – Example – Data string GNS received by the EUT . 149
Table B.7 – Example – Checksum data received . 151
Table B.8 – Example – Break of data line . 151
Table B.9 – Example – Receiving interval . 151
Table B.10 – Example – Talker ID . 152
Table C.1 – Six-bit binary field conversion table . 153
Table D.1 – System alarm fields . 156
Table F.1 – Example message from ITU-R M.1371 . 173

– 8 – IEC 61162-1:2016 RLV  IEC 2016

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION

EQUIPMENT AND SYSTEMS – DIGITAL INTERFACES –

Part 1: Single talker and multiple listeners

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.

International Standard IEC 61162-1 has been prepared by IEC technical committee 80:

Maritime navigation and radiocommunication equipment and systems.

This fifth edition cancels and replaces the fourth edition published in 2010, and constitutes a

technical revision.
This edition includes the following significant technical changes with respect to the previous

edition:
• new identifiers have been added to Table 4;

• the sentences CBR and MEB have been removed as they are now solely used by AIS shore

based equipment:
• new sentences ACN, ALC, ALF, ARC, EPV, HCR, HRM, MOB, NSR, RLM, RRT, SM1, SM2,
SM3, SM4, SMB, SPW and TRL have been added;
• revisions have been made to ABK, ABM, GNS, NAK, NRM, RMC, ROR and TTD;
• the methods of testing in Annex B have been revised.
The text of this standard is based on the following documents:
FDIS Report on voting
80/799/FDIS 80/806/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.
A list of all parts in the IEC 61162 series, published under the general title Maritime navigation
and radiocommunication equipment and systems – Digital interface, can be found on the IEC
website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC website 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.

– 10 – IEC 61162-1:2016 RLV © IEC 2016

INTRODUCTION
IEC 61162 Maritime navigation and radiocommunication equipment and systems – Digital

interfaces consists of 4 5 parts which specify digital interfaces for application in marine

navigation, radiocommunication and system integration, as follows:

Part 1: Single talker and multiple listeners;

Part 2: Single talker and multiple listeners, high speed transmission;

Part 3: Multiple talkers and multiple listeners – Serial data instrument network;

Part 450: Multiple talkers and multiple listeners – Ship systems Ethernet interconnection;

Part 460: Multiple talkers and multiple listeners – Ethernet interconnection – Safety and
security
IEC technical committee 80 interface standards are developed with input from manufacturers,
private and government organisations and equipment operators. The information is intended to
meet the needs of users at the time of publication, but users should recognise that as
applications and technology change, interface standards should change as well. Users of this
standard are advised to immediately inform the IEC of any perceived inadequacies therein.
The first edition of IEC 61162-1 was published in 1995. The second edition published in 2000
removed some sentences which were no longer in use, added some new sentences and
included details of the ship equipment defined in IMO resolutions together with appropriate
sentences for communication between them. This information was subsequently removed from
the third edition when it became the practice to specify the sentence formatters in the individual
standards for equipment.
The third edition published in 2007 introduced a re-arrangement of the text and new sentences
particularly to support the Automatic Identification System and the Voyage Data Recorder. The
third edition also introduced a further type of start of sentence delimiter. The conventional
delimiter “$” was retained for the conventional sentences which are now called parametric
sentences. The new delimiter “!” identifies sentences that conform to special purpose
encapsulation.
The fourth edition removes removed some sentences which are were not in use, adds added
some new sentences for new applications and makes made some corrections and additions. In
particular the sentences of relevance to satellite navigation receivers have been were
expanded to facilitate the description of new satellite systems.
This fifth edition also removes some sentences which are no longer in use, adds some new
sentences for new applications and makes some corrections and additions.

Liaison has been maintained with NMEA and this edition has been aligned where appropriate
with NMEA 0183 version 4.00 4.10.

MARITIME NAVIGATION AND RADIOCOMMUNICATION

EQUIPMENT AND SYSTEMS – DIGITAL INTERFACES –

Part 1: Single talker and multiple listeners

1 Scope
This part of IEC 61162 contains the requirements for data communication between maritime
electronic instruments, navigation and radiocommunication equipment when interconnected via
an appropriate system.
This part of IEC 61162 is intended to support one-way serial data transmission from a single
talker to one or more listeners. These data are in printable ASCII form and may include
information such as position, speed, depth, frequency allocation, etc. Typical messages may be
from about 11 to a maximum of 79 characters in length and generally require transmission no
more rapidly than one message per second.
The electrical definitions in this standard are not intended to accommodate high-bandwidth
applications such as radar or video imagery, or intensive database or file transfer applications.
Since there is no provision for guaranteed delivery of messages and only limited error checking
capability, this standard should be used with caution in all safety applications.
For applications where a faster transmission rate is necessary, reference should be made to
IEC 61162-2.
For applications to shore based equipment of the automatic identification system (AIS)
reference should be made to the IEC 62320 series.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references,
...

IEC 61162-1 ®
Edition 5.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Digital
interfaces –
Part 1: Single talker and multiple listeners

Matériels et systèmes de navigation et de radiocommunication maritimes –
Interfaces numériques –
Partie 1: Emetteur unique et récepteurs multiples

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IEC 61162-1 ®
Edition 5.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Digital

interfaces –
Part 1: Single talker and multiple listeners

Matériels et systèmes de navigation et de radiocommunication maritimes –

Interfaces numériques –
Partie 1: Emetteur unique et récepteurs multiples

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-5356-4

– 2 – IEC 61162-1:2016  IEC 2016
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions. 13
3.1 General . 13
3.2 Terms and definitions . 13
4 Manufacturer's documentation . 13
5 Hardware specification . 13
5.1 General . 13
5.2 Interconnecting wire . 13
5.3 Conductor definitions. 13
5.4 Electrical connections/shield requirements . 14
5.5 Connector . 14
5.6 Electrical signal characteristics . 14
5.6.1 General . 14
5.6.2 Signal state definitions . 14
5.6.3 Talker drive circuits . 14
5.6.4 Listener receive circuits . 14
5.6.5 Electrical isolation . 15
5.6.6 Maximum voltage on bus . 15
6 Data transmission . 15
7 Data format protocol . 16
7.1 Characters . 16
7.1.1 General . 16
7.1.2 Reserved characters . 16
7.1.3 Valid characters . 16
7.1.4 Undefined characters . 16
7.1.5 Character symbols . 16
7.2 Fields . 16
7.2.1 String . 16
7.2.2 Address field . 16
7.2.3 Data fields . 17
7.2.4 Checksum field . 18
7.2.5 Sequential message identifier field . 18
7.3 Sentences . 19
7.3.1 General structure . 19
7.3.2 Description of approved sentences . 19
7.3.3 Parametric sentences . 19
7.3.4 Encapsulation sentences. 20
7.3.5 Query sentences . 22
7.3.6 Proprietary sentences . 23
7.3.7 Command sentences . 24
7.3.8 Valid sentences . 24
7.3.9 Multi-sentence messages . 25
7.3.10 Sentence transmission timing . 25

7.3.11 Additions to approved sentences . 25
7.4 Error detection and handling . 25
7.5 Handling of deprecated sentences . 25
8 Data content . 26
8.1 Character definitions . 26
8.2 Field definitions . 28
8.3 Approved sentences . 31
8.3.1 General format . 31
8.3.2 AAM – Waypoint arrival alarm . 31
8.3.3 ABK – AIS addressed and binary broadcast acknowledgement . 31
8.3.4 ABM – AIS addressed binary and safety related message . 32
8.3.5 ACA – AIS channel assignment message . 33
8.3.6 ACK – Acknowledge alarm . 35
8.3.7 ACN – Alert command . 35
8.3.8 ACS – AIS channel management information source . 36
8.3.9 AIR – AIS interrogation request . 36
8.3.10 AKD – Acknowledge detail alarm condition . 37
8.3.11 ALA – Report detailed alarm condition . 38
8.3.12 ALC – Cyclic alert list . 39
8.3.13 ALF – Alert sentence . 40
8.3.14 ALR – Set alarm state . 42
8.3.15 APB – Heading/track controller (autopilot) sentence B . 42
8.3.16 ARC – Alert command refused . 43
8.3.17 BBM – AIS broadcast binary message . 44
8.3.18 BEC – Bearing and distance to waypoint – Dead reckoning. 45
8.3.19 BOD – Bearing origin to destination . 45
8.3.20 BWC – Bearing and distance to waypoint – Great circle . 45
8.3.21 BWR – Bearing and distance to waypoint – Rhumb line . 45
8.3.22 BWW – Bearing waypoint to waypoint . 46
8.3.23 CUR – Water current layer – Multi-layer water current data . 46
8.3.24 DBT – Depth below transducer . 47
8.3.25 DDC – Display dimming control . 47
8.3.26 DOR – Door status detection . 48
8.3.27 DPT – Depth . 49
8.3.28 DSC – Digital selective calling information . 49
8.3.29 DSE – Expanded digital selective calling . 50
8.3.30 DTM – Datum reference . 50
8.3.31 EPV – Command or report equipment property value . 51
8.3.32 ETL – Engine telegraph operation status . 52
8.3.33 EVE – General event message . 53
8.3.34 FIR – Fire detection . 54
8.3.35 FSI – Frequency set information . 55
8.3.36 GBS – GNSS satellite fault detection . 56
8.3.37 GEN – Generic binary information . 57
8.3.38 GFA – GNSS fix accuracy and integrity . 58
8.3.39 GGA – Global positioning system (GPS) fix data . 59
8.3.40 GLL – Geographic position – Latitude/longitude . 59
8.3.41 GNS – GNSS fix data . 60
8.3.42 GRS – GNSS range residuals . 62

– 4 – IEC 61162-1:2016  IEC 2016
8.3.43 GSA – GNSS DOP and active satellites . 64
8.3.44 GST – GNSS pseudorange noise statistics . 66
8.3.45 GSV – GNSS satellites in view . 67
8.3.46 HBT – Heartbeat supervision sentence . 68
8.3.47 HCR – Heading correction report . 69
8.3.48 HDG – Heading, deviation and variation . 69
8.3.49 HDT – Heading true . 70
8.3.50 HMR – Heading monitor receive . 70
8.3.51 HMS – Heading monitor set . 71
8.3.52 HRM – heel angle, roll period and roll amplitude measurement device . 71
8.3.53 HSC – Heading steering command . 72
8.3.54 HSS – Hull stress surveillance systems . 72
8.3.55 HTC – Heading/track control command; HTD – Heading /track control
data . 72
8.3.56 LR1 – AIS long-range reply sentence 1 . 74
8.3.57 LR2 – AIS long-range reply sentence 2 . 74
8.3.58 LR3 – AIS long-range reply sentence 3 . 75
8.3.59 LRF – AIS long-range function . 75
8.3.60 LRI – AIS long-range interrogation . 76
8.3.61 MOB – Man over board notification . 77
8.3.62 MSK – MSK receiver interface . 79
8.3.63 MSS – MSK receiver signal status . 79
8.3.64 MTW – Water temperature . 79
8.3.65 MWD – Wind direction and speed . 79
8.3.66 MWV – Wind speed and angle . 80
8.3.67 NAK – Negative acknowledgement . 80
8.3.68 NRM – NAVTEX receiver mask . 81
8.3.69 NRX – NAVTEX received message . 82
8.3.70 NSR – Navigation status report . 84
8.3.71 OSD – Own ship data . 85
8.3.72 POS – Device position and ship dimensions report or configuration
command . 86
8.3.73 PRC – Propulsion remote control status . 87
8.3.74 RLM – Return link message . 88
8.3.75 RMA – Recommended minimum specific LORAN-C data . 89
8.3.76 RMB – Recommended minimum navigation information . 89
8.3.77 RMC – Recommended minimum specific GNSS data . 90
8.3.78 ROR – Rudder order status . 91
8.3.79 ROT – Rate of turn. 92
8.3.80 RRT – Report route transfer . 92
8.3.81 RPM – Revolutions . 93
8.3.82 RSA – Rudder sensor angle . 93
8.3.83 RSD – Radar system data . 93
8.3.84 RTE – Routes . 94
8.3.85 SFI – Scanning frequency information . 95
8.3.86 SMI – SafetyNET Message, All Ships/NavArea . 95
8.3.87 SM2 – SafetyNET Message, Coastal Warning Area . 97
8.3.88 SM3 – SafetyNET Message, Circular Area address . 99
8.3.89 SM4 – SafetyNET Message, Rectangular Area Address . 101

8.3.90 SMB – IMO SafetyNET Message Body . 104
8.3.91 SPW – Security password sentence . 105
8.3.92 SSD – AIS ship static data . 106
8.3.93 STN – Multiple data ID . 106
8.3.94 THS – True heading and status . 107
8.3.95 TLB – Target label . 107
8.3.96 TLL – Target latitude and longitude . 107
8.3.97 TRC – Thruster control data . 108
8.3.98 TRL – AIS transmitter-non-functioning log . 109
8.3.99 TRD – Thruster response data . 110
8.3.100 TTD – Tracked target data . 110
8.3.101 TTM – Tracked target message . 112
8.3.102 TUT – Transmission of multi-language text. 113
8.3.103 TXT – Text transmission . 114
8.3.104 UID – User identification code transmission . 115
8.3.105 VBW – Dual ground/water speed . 115
8.3.106 VDM – AIS VHF data-link message . 116
8.3.107 VDO – AIS VHF data-link own-vessel report . 117
8.3.108 VDR – Set and drift . 117
8.3.109 VER – Version . 118
8.3.110 VHW – Water speed and heading . 118
8.3.111 VLW – Dual ground/water distance . 119
8.3.112 VPW – Speed measured parallel to wind . 119
8.3.113 VSD – AIS voyage static data . 119
8.3.114 VTG – Course over ground and ground speed . 120
8.3.115 WAT – Water level detection . 120
8.3.116 WCV – Waypoint closure velocity . 121
8.3.117 WNC – Distance waypoint to waypoint . 122
8.3.118 WPL – Waypoint location . 122
8.3.119 XDR – Transducer measurements . 122
8.3.120 XTE – Cross-track error, measured . 123
8.3.121 XTR – Cross-track error, dead reckoning . 124
8.3.122 ZDA – Time and date . 124
8.3.123 ZDL – Time and distance to variable point . 124
8.3.124 ZFO – UTC and time from origin waypoint . 124
8.3.125 ZTG – UTC and time to destination waypoint . 125
9 Applications . 125
9.1 Example parametric sentences . 125
9.1.1 General . 125
9.1.2 Example 1 – LORAN-C latitude/longitude . 125
9.1.3 Example 2 – LORAN-C arrival alarm . 125
9.1.4 Example 3 – Proprietary sentence . 126
9.1.5 Example 4 – RMA examples. 126
9.1.6 Example 5 – FSI examples . 127
9.1.7 Example 6 – MSK/MSS examples . 127
9.1.8 Example 7 – DSC and DSE sentences . 127
9.1.9 Example 8 – FIR, DOR and WAT sentences . 128
9.2 Example encapsulation sentences . 128
9.3 Examples of receiver diagrams . 128

– 6 – IEC 61162-1:2016  IEC 2016
Annex A (informative) Glossary . 130
Annex B (normative) Guidelines for methods of testing and required test results . 137
B.1 General . 137
B.2 Definition of environmental conditions for the tests . 137
B.3 Examination of the manufacturer's documentation . 137
B.4 Test of hardware . 138
B.4.1 Interface units . 138
B.4.2 Input circuit test . 138
B.4.3 Check of electrical isolation . 138
B.4.4 Maximum input voltage test . 138
B.4.5 Test arrangement for performance tests according to IEC 60945 . 138
B.4.6 Test under maximum interface workload . 138
B.4.7 Test for correct parsing of sentences . 139
B.4.8 Test under long term conditions . 140
B.4.9 Protocol test of the interface of the EUT . 140
Annex C (normative) Six-bit binary field conversion . 146
Annex D (normative) Alarm system fields . 149
Annex E (informative) Example of use of FIR, DOR and WAT sentences . 158
E.1 Example of the use of system status messages . 158
E.2 Use of system division codes. 158
E.3 Send complete status . 159
E.4 Change measurement point status . 160
E.5 Point status change during a status update . 160
E.6 Failure in a sub-system . 160
E.7 Status updates when a sub-system is in fault . 161
E.8 Signal a correction of a sub-system fault . 161
Annex F (informative) Example encapsulation sentence. 162
F.1 Example encapsulation sentence . 162
F.2 AIS VHF data-link message VDM sentence encapsulation example . 162
F.3 Background discussion – Encapsulation coding . 162
F.4 Decoding the encapsulated string . 164
F.5 Conversion from symbols to binary bits . 164
F.6 Organising the binary message data . 165
F.7 Interpreting the decoded binary strings . 165
Bibliography . 168

Figure 1 – Listener receive circuit . 15
Figure 2 – Data transmission format . 15
Figure 3 – Example 1, J-FET, N channel, opto-isolator based listener circuit . 129
Figure 4 – Example 2, NPN opto-isolator based listener circuit . 129
Figure C.1 – 6-bit binary code converted to valid IEC 61162-1 character . 147
Figure C.2 – Valid IEC 61162-1 character converted to 6-bit binary code . 148
Figure E.1 – Example system diagram . 159
Figure F.1 – Message data format . 163
Figure F.2 – Work sheet for decoding and interpreting encapsulated string . 167

Table 1 – Reserved characters . 26
Table 2 – Valid characters . 26
Table 3 – Character symbol . 27
Table 4 – Talker identifier mnemonics . 28
Table 5 – Field type summary . 30
Table B.1 – Example – Special characters . 139
Table B.2 – Example – Parsing . 139
Table B.3 – Example – Future extensions . 140
Table B.4 – Example – Data string GGA sent by the EUT to the test receiver (listener) . 141
Table B.5 – Example – Checksum data sent . 141
Table B.6 – Example – Data string GNS received by the EUT . 143
Table B.7 – Example – Checksum data received . 144
Table B.8 – Example – Break of data line . 145
Table B.9 – Example – Receiving interval . 145
Table B.10 – Example – Talker ID . 145
Table C.1 – Six-bit binary field conversion table . 146
Table D.1 – System alarm fields . 149
Table F.1 – Example message from ITU-R M.1371 . 166

– 8 – IEC 61162-1:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS – DIGITAL INTERFACES –

Part 1: Single talker and multiple listeners

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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with the International Organization for Standardization (ISO) in accordance with conditions determined by
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
transparently to the maximum extent possible in their national and regional publications. Any divergence
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
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
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 61162-1 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
This bilingual version (2018-02) corresponds to the English version, published in 2016-08.
This fifth edition cancels and replaces the fourth edition published in 2010, and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• new identifiers have been added to Table 4;
• the sentences CBR and MEB have been removed as they are now solely used by AIS shore
based equipment:
• new sentences ACN, ALC, ALF, ARC, EPV, HCR, HRM, MOB, NSR, RLM, RRT, SM1, SM2,
SM3, SM4, SMB, SPW and TRL have been added;
• revisions have been made to ABK, ABM, GNS, NAK, NRM, RMC, ROR and TTD;
• the methods of testing in Annex B have been revised.
The text of this standard is based on the following documents:
FDIS Report on voting
80/799/FDIS 80/806/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.
The French version of this standard has not been voted upon.
A list of all parts in the IEC 61162 series, published under the general title Maritime navigation
and radiocommunication equipment and systems – Digital interface, can be found on the IEC
website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC website 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.
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.

– 10 – IEC 61162-1:2016  IEC 2016
INTRODUCTION
IEC 61162 Maritime navigation and radiocommunication equipment and systems – Digital
interfaces consists of 5 parts which specify digital interfaces for application in marine
navigation, radiocommunication and system integration, as follows:
Part 1: Single talker and multiple listeners;
Part 2: Single talker and multiple listeners, high speed transmission;
Part 3: Multiple talkers and multiple listeners – Serial data instrument network;
Part 450: Multiple talkers and multiple listeners – Ethernet interconnection;
Part 460: Multiple talkers and multiple listeners – Ethernet interconnection – Safety and
security
IEC technical committee 80 interface standards are developed with input from manufacturers,
private and government organisations and equipment operators. The information is intended to
meet the needs of users at the time of publication, but users should recognise that as
applications and technology change, interface standards should change as well. Users of this
standard are advised to immediately inform the IEC of any perceived inadequacies therein.
The first edition of IEC 61162-1 was published in 1995. The second edition published in 2000
removed some sentences which were no longer in use, added some new sentences and
included details of the ship equipment defined in IMO resolutions together with appropriate
sentences for communication between them. This information was subsequently removed from
the third edition when it became the practice to specify the sentence formatters in the individual
standards for equipment.
The third edition published in 2007 introduced a re-arrangement of the text and new sentences
particularly to support the Automatic Identification System and the Voyage Data Recorder. The
third edition also introduced a further type of start of sentence delimiter. The conventional
delimiter “$” was retained for the conventional sentences which are now called parametric
sentences. The new delimiter “!” identifies sentences that conform to special purpose
encapsulation.
The fourth edition removed some sentences which were not in use, added some new
sentences for new applications and made some corrections and additions. In particular the
sentences of relevance to satellite navigation receivers were expanded to facilitate the
description of new satellite systems.
This fifth edition also removes some sentences which are no longer in use, adds some new
sentences for new applications and makes some corrections and additions.
Liaison has been maintained with NMEA and this edition has been aligned where appropriate
with NMEA 0183 version 4.10.
MARITIME NAVIGATION AND RADIOCOM
...