IEC PAS 61162-100:2002

Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 100: Single talker and multiple listeners - Extra requirements to IEC 61162-1 for the UAIS

Is a publicly available specification providing information on the necessary interface standards for use with the UAIS, which are not available in the current issue of IEC 61162-1 Ed 2. The interface standards are currently being adopted in the NMEA 0183 standard and alignment will be maintained.

General Information

• Status: Replaced
• Publication Date: 08-Apr-2002
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: TC 80 - Maritime navigation and radiocommunication equipment and systems
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 07-Jul-2008

Relations

• Replaced By: IEC 61162-1:2007 - Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 1: Single talker and multiple listeners
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/PAS 61162-100
Edition 1.0
2002-04
Maritime navigation and radiocommunication
equipment and systems –
Digital interfaces –
Part 100:
Single talker and multiple listeners –
Extra requirements to IEC 61162-1
for the UAIS
PUBLI C LY AVAI LABLE SPECI F I CATI O N
IN TER N A TION AL
E L E C T R OT E CHNI CA L
Reference number
C O MMI S S I O N
IEC/PAS 61162-100
IEC/PAS 61162-100
Edition 1.0
2002-04
Maritime navigation and radiocommunication
equipment and systems –
Digital interfaces –
Part 100:
Single talker and multiple listeners –
Extra requirements to IEC 61162-1
for the UAIS
PUBLI C LY AVAI LABLE SPECI F I CATI O N
IN TER N A TION AL
E L E C T R OT E CHNI CA L
Reference number
C O MMI S S I O N
IEC/PAS 61162-100
– 2 – Copyright  2002, IEC
CONTENTS
FOREWORD .3

INTRODUCTION.4

Clause
1 Scope .5

2 Normative references .5

3 Definitions .6
3.1 Parametric sentences .6
3.2 Encapsulation sentences .6
4 Data requirements of the AIS.7
5 Existing IEC 61162-1 sentences for the AIS .7
6 Additional IEC 61162-1 parametric sentences for the AIS .8
7 New encapsulation sentence structures for the AIS .18
8 Data format protocol errors – error detection and handling .21
Annex A (normative) Approved encapsulation sentence structure .22
Annex B (normative) Summary of changes to existing IEC 61162-1 clauses which
have been modified to include encapsulation sentences .23
B.1 Message .23
B.2 Sequential Message Identifier .23
B.3 Multi-sentence Messages .23
B.4 Proprietary Sentences .23
B.5 Future additions to Approved sentences.24
B.6 Changes to the Reserved Character List .24
B.7 Changes to Character Symbol Table .24
B.8 Additions to field type summary : .25
Annex C (normative) Six bit binary field conversion .26
Annex D (informative) Example encapsulation sentences.29
D.1 New clause 7 to IEC 61162-1.29
D.2 Background Discussion - encapsulation coding .29
D.3 Decoding the Encapsulated String .31
D.4 Conversion from symbols to binary bits .31
D.5 Organizing the Binary Message Data .32
D.6 Interpreting the Decoded Binary Strings .32
Annex E (informative) Copy of ITU-R M.1371-1:2000, TABLE 15 .35
Figures
Figure C-1 - 6-bit binary code converted to valid IEC 61162-1 character .27
Figure C-2 - Valid IEC 61162-1 character converted to 6-bit binary code.28
Figure D-1 - Message Data format .30
Figure D-2 - Work sheet for decoding and interpreting encapsulated string .34

Copyright  2002, IEC – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT

AND SYSTEMS – DIGITAL INTERFACES –

Part 100: Single talker and multiple listeners –

Extra requirements to IEC 61162-1 for the UAIS

FOREWORD
A PAS is a technical specification not fulfilling the requirements for a standard, but made available to
the public.
IEC-PAS 61162-100 has been processed by IEC technical committee 80: Maritime navigation and
radiocommunication equipment and systems.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document:
Draft PAS Report on voting
80/330/PAS 80/338/RVD
Following publication of this PAS, the technical committee or subcommittee concerned will investigate
the possibility of transforming the PAS into an International Standard.
This PAS document relates to International Standard IEC 61162-1. The document has been co-
ordinated with the TC 80 Working Group preparing the AIS Standard IEC 61993 Part 2, and the NMEA
Standards Committee.
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.

– 4 – Copyright  2002, IEC
INTRODUCTION
This document is issued as a IEC Publicly Available Specification according to the IEC/PAS

approval process. This agreed process allows the new information needed for the

development of UAIS to be placed in the public domain in a shorter timescale than revising

the appropriate International standards.

This document provides information on the necessary interface standards for use with the

UAIS, which are not available in the current issue of IEC 61162-1 Ed 2. The information in this

PAS supersedes that in annex B (informative) of IEC 61993-2, the Standard for UAIS.

This PAS will include the interface standards, which are currently being adopted in the NMEA
0183 standard and alignment will be maintained.
This PAS will be replaced at a future date by, or be included within, a revision of the
international standard IEC 61162-1.

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MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT

AND SYSTEMS – DIGITAL INTERFACES –

Part 100: Single talker and multiple listeners –

Extra requirements to IEC 61162-1 for the UAIS

1 Scope
All the requirements to effectively transmit the data of the mobile TDMA based AIS station are
included in this PAS.
Whilst the established Standard IEC 61162-1 sentences are available for certain functions a
number of new sentences are now required to permit all specified AIS data to be transmitted.
The total requirements for the AIS are included in this PAS document but the current
Standard IEC 61162-1 should be referred to for the reference data applicable to the existing
format.
The reader should be aware that certain of the new sentences may include new features not
currently included in IEC 61162-1. For this reason the PAS has been divided into three
sections, namely: -
- Existing IEC 61162-1 sentences to be employed in the AIS (and elsewhere) – see clause 5
- Additional IEC 61162-1 sentences to cover new AIS requirements, but maintaining the
standard format – see clause 6
- Proposed new sentence structures to meet specific AIS requirements and which cannot be
accommodated in the standard IEC 61162-1 format. These new sentence standards are
essentially designed to meet the AIS requirements and are not for general use – see
clause 7 and annex A.
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.
The references contained in IEC 61162-1 apply to this PAS. In addition the following apply:
IEC Standard 61993 Part 2: Universal Shipborne Automatic Identification System (AIS);
Operational and Performance Requirements, Methods of Test and required Test Results.

ITU-R M.1371-1:2001 Technical characteristics for a Universal Shipborne Automatic
Identification System (AIS) using TDMA in the VHF maritime mobile band.
IMO Recommendation on Performance Standards for a Universal Automatic Identification
System (AIS) MSC.74(69)
IMO SOLAS Convention, Chapter V (2002)
IMO HSC Code, Chapter 13
ISO/IEC 10646-1 (1993-05). Unicode Standard

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3 Definitions
3.1 Parametric sentences
(See IEC 61162-1 clause 5 Data format protocol)

These sentences start with the “$” (HEX 24) delimiter and represent the majority of approved

sentences defined by IEC 61162-1 and this PAS. This is the preferred method for conveying

information. Refer to clauses 5 and 6 for details.

The maximum number of characters in a sentence shall be 82, consisting of a maximum of 79

characters between the starting delimiter “$” and the terminating delimiter .

The minimum number of fields in a sentence is one (1). The first field shall be an address field
containing the identity of the talker and the sentence formatter, which specifies the number of
data fields in the sentence, the type of data they contain and the order in which the data fields
are transmitted. The remaining portion of the sentence may contain zero or multiple data
fields.
The maximum number of fields allowed in a single sentence is limited only by the maximum
sentence length and shall always be used even if data for that field is unavailable.
The basic rules for parametric sentence structures are:
- The sentence begins with the “$” delimiter.
- Only approved sentence formatters are allowed. Formatters used by special-purpose
encapsulation sentences cannot be re-used. (See IEC 61162-1, clause 6.2 (table 5).)
- Only valid characters are allowed. (See IEC 61162-1, clause 6.1 (tables 1 and 2).)
- Only approved field types are allowed. (See IEC 61162-1, clause 6.2 (table 6).)
- Data fields (parameters) are individually delimited, and their content is identified and often
described in detail by this standard.
- Encapsulated non-delimited data fields are NOT ALLOWED.
3.2 Encapsulation sentences
(New definition not currently in IEC 61162-1)
These sentences start with the “!” (HEX 21) delimiter. The function of this special-purpose
sentence structure is to provide a means to convey information, when the specific data
content is unknown or greater information bandwidth is needed. This is similar to a modem
that transfers information without knowing how the information is to be decoded or
interpreted.
The basic rules for encapsulation sentence structures are:
- The sentence begins with the “!” delimiter.
- Only approved sentence formatters are allowed. Formatters used by conventional
parametric sentences can not be re-used. (See clauses 5 and 6, and IEC 61162-1, clause
6.2 (table 5)).
- Only valid characters are allowed. (See IEC 61162-1, clause 6.1 (tables 1 and 2).)
- Only approved field types are allowed. (See annex B.5 and IEC 61162-1, clause 6.2
(table 6).)
- Only Six bit coding may be used to create encapsulated data fields. (See annex B.5.)
- Encapsulated data fields may consist of any number of parameters, and their content is
not identified or described by this standard.
- The sentence must be defined with one encapsulated data field and any number of
parametric data fields separated by the “,” data field delimiter. The encapsulated data

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field shall always be the second to last data field in the
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