IEC 61108-1:2003

Maritime navigation and radiocommunication equipment and systems - Global navigation satellite systems (GNSS) - Part 1: Global positioning system (GPS) - Receiver equipment - Performance standards, methods of testing and required test results

IEC 61108-1:2003 Specifies the minimum performance standards, methods of testing and required test results for GPS shipborne receiver equipment, based on the relevant IMO Resolution, which uses the signals from the United States of America, Department of Defence (US DOD), Global Positioning System (GPS) in order to determine position.

Matériels et systèmes de navigation et de radiocommunication maritimes - Système mondial de navigation par satellite (GNSS) - Partie 1: Système de positionnement par satellite GPS - Matériel de réception - Normes de fonctionnement, méthodes d'essai et résultats d'essai exigibles

La CEI 61108-1:2003 spécifie les exigences minimales en matière de normes de fonctionnement, de méthodes d'essai et de résultats d'essai exigés pour le matériel de réception de bord GPS, conformément à la Résolution MSC.112(73) de l'OMI, qui utilise les signaux provenant du système de positionnement mondial (GPS) du Département de la Défense américain (US DOD) afin de déterminer une position.

General Information

• Status: Published
• Publication Date: 30-Jul-2003
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: TC 80 - Maritime navigation and radiocommunication equipment and systems
• Drafting Committee: WG 4A - TC 80/WG 4A
• Current Stage: PPUB - Publication issued
• Start Date: 15-Dec-2003
• Completion Date: 31-Jul-2003

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61108-1
Second edition
2003-07
Maritime navigation and radiocommunication
equipment and systems –
Global navigation satellite systems (GNSS) –
Part 1:
Global positioning system (GPS) –
Receiver equipment – Performance standards,
methods of testing and required test results
Matériels et systèmes de navigation et
de radiocommunication maritimes –
Système mondial de navigation par satellite (GNSS) –
Partie 1:
Système de positionnement par satellite GPS –
Matériel de réception – Normes de fonctionnement,
méthodes d'essai et résultats d'essai exigibles
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD
61108-1
Second edition
2003-07
Maritime navigation and radiocommunication
equipment and systems –
Global navigation satellite systems (GNSS) –
Part 1:
Global positioning system (GPS) –
Receiver equipment – Performance standards,
methods of testing and required test results
Matériels et systèmes de navigation et
de radiocommunication maritimes –
Système mondial de navigation par satellite (GNSS) –
Partie 1:
Système de positionnement par satellite GPS –
Matériel de réception – Normes de fonctionnement,
méthodes d'essai et résultats d'essai exigibles
 IEC 2003  Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
U
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 61108-1 © IEC:2003(E)
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Terms, definitions and abbreviations. 6
3.1 Definitions . 6
3.2 Abbreviations. 6
4 Minimum performance standards . 7
4.1 Object. 7
4.2 GPS receiver equipment . 7
4.3 Performance standards for GPS receiver equipment. 8
5 Methods of testing and required test results.15
5.1 Test sites.15
5.2 Test sequence .15
5.3 Standard test signals .15
5.4 Determination of accuracy .16
5.5 Test conditions .16
5.6 Methods of test and required test results .17
5.7 Typical interference conditions .24
5.8 Performance checks under IEC 60945 conditions .28
Figure 1 – Broadband interference environment .25
Figure 2 – CW interference mask .25
Table 1 – Acquisition time limits .10
Table 2 – Accuracy of COG.14

61108-1 © IEC:2003(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) –
Part 1: Global positioning system (GPS) –
Receiver equipment –
Performance standards, methods of testing
and required test results
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,
Technical Reports, and Guides (hereafter referred to as “IEC Publication(s)”). 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. 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 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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61108-1 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 1996.
This edition of the IEC standard for GPS, compared to the previous edition, includes the
following technical changes:
a) it reflects the changes brought about by IMO adopting GPS as part of the carriage
requirement on ships defined in SOLAS Chapter V;
b) the new IMO performance standard, resolution MSC.112(73), replaced the previous issue,
A.819(19), for new installations on the 1st of July 2002. This second edition of IEC 61108-1
incorporates revised tests for type approvals to the new performance standard;

– 4 – 61108-1 © IEC:2003(E)
c) changes include the need for a data output to the IEC 61162 series giving COG SOG and
UTC with validity marking, operation during interference conditions and improved failure
warnings.
The text of this standard is based on the following documents:
FDIS Report on voting
80/371/FDIS 80/373/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.
The committee has decided that the contents of this publication will remain unchanged until
2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this standard may be issued at a later date.

61108-1 © IEC:2003(E) – 5 –
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) –
Part 1: Global positioning system (GPS) –
Receiver equipment –
Performance standards, methods of testing
and required test results
1 Scope
This part of IEC 61108 specifies the minimum performance standards, methods of testing and
required test results for GPS shipborne receiver equipment, based on IMO Resolution
MSC.112(73), which uses the signals from the United States of America, Department of
Defence (US DOD), Global Positioning System (GPS) in order to determine position. A
description of the GPS SPS is given in the normative reference – GPS, SPS signal specifi-
cation – USA Department of Defence – 3rd Edition October 2001. This receiver standard
applies to phases of the voyage "other waters" as defined in IMO Resolution A.529(13).
All text of this standard, whose meaning is identical to that in IMO Resolution MSC.112(73), is
printed in italics and the Resolution and paragraph number indicated between brackets i.e.
(M.112/A1.2).
The requirements in clause 4 are cross-referenced to the tests in clause 5 and vice versa.
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 60721-3-6:1987, Classification of environmental conditions – Part 3: Classification of
groups of environmental parameters and their severities – Ship environment
IEC 60945, Maritime navigation and radiocommunication equipment and systems – General
requirements – Methods of testing and required test results
IEC 61162 (all parts), Maritime navigation and radiocommunication equipment and systems –
Digital interfaces
IMO Resolution A.529(13):1983, Accuracy standards for navigation
IMO Resolution A.694(17):1991, General requirements for shipborne radio equipment forming
part of the Global maritime distress and safety system (GMDSS) and for electronic
navigational aids
IMO Resolution A.815(19):1995, Worldwide radionavigation system
IMO Resolution MSC.112(73):2000, Performance standards for shipborne global positioning
system (GPS) receiver equipment

– 6 – 61108-1 © IEC:2003(E)
IMO Resolution MSC.114(73):2000, Performance standards for shipborne DGPS and
DGLONASS maritime radio beacon receiver equipment
ITU-R Recommendation M.823-1:1995, Technical characteristics of differential transmissions
for global navigation satellite systems (GNSS) from maritime radio beacons in the frequency
band 285 kHz-325 kHz (283,5 kHz-315 kHz in Region 1)
ITU-R Recommendation M.823-2:1997, Technical characteristics of differential transmissions
for Global Navigation Satellite Systems from maritime radio beacons in the frequency band
283.5-315 kHz in Region 1 and 285-325 kHz in Regions 2 and 3
ITU-R Recommendation M.1477:2000, Technical and performance characteristics of current
and planned radionavigation-satellite service (space-to-Earth) and aeronautical r
...

IEC 61108-1 ®
Edition 2.0 2003-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Global
navigation satellite systems (GNSS) –
Part 1: Global positioning system (GPS) – Receiver equipment – Performance
standards, methods of testing and required test results

Matériels et systèmes de navigation et de radiocommunication maritimes –
Système mondial de navigation par satellite (GNSS) –
Partie 1: Système de positionnement par satellite GPS – Matériel de réception –
Normes de fonctionnement, méthodes d'essai et résultats d'essai exigibles

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IEC 61108-1 ®
Edition 2.0 2003-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Global

navigation satellite systems (GNSS) –

Part 1: Global positioning system (GPS) – Receiver equipment – Performance

standards, methods of testing and required test results

Matériels et systèmes de navigation et de radiocommunication maritimes –

Système mondial de navigation par satellite (GNSS) –

Partie 1: Système de positionnement par satellite GPS – Matériel de réception –

Normes de fonctionnement, méthodes d'essai et résultats d'essai exigibles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 47.020.70 ISBN 978-2-83220-621-8

– 2 – 61108-1 © IEC:2003
CONTENTS
FOREWORD . 3

1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 Minimum performance standards . 7
4.1 Object . 7
4.2 GPS receiver equipment . 7
4.3 Performance standards for GPS receiver equipment . 8
5 Methods of testing and required test results . 15
5.1 Test sites . 15
5.2 Test sequence . 15
5.3 Standard test signals . 15
5.4 Determination of accuracy . 16
5.5 Test conditions . 16
5.6 Methods of test and required test results . 17
5.7 Typical interference conditions . 24
5.8 Performance checks under IEC 60945 conditions . 28

Figure 1 – Broadband interference environment . 25
Figure 2 – CW interference mask . 25

Table 1 – Acquisition time limits . 10
Table 2 – Accuracy of COG . 14

61108-1 © IEC:2003 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) –

Part 1: Global positioning system (GPS) –
Receiver equipment –
Performance standards, methods of testing
and required test results
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,
Technical Reports, and Guides (hereafter referred to as “IEC Publication(s)”). 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. 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 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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61108-1 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 1996.
This edition of the IEC standard for GPS, compared to the previous edition, includes the
following technical changes:
a) it reflects the changes brought about by IMO adopting GPS as part of the carriage
requirement on ships defined in SOLAS Chapter V;
b) the new IMO performance standard, resolution MSC.112(73), replaced the previous issue,
A.819(19), for new installations on the 1st of July 2002. This second edition of IEC 61108-
1 incorporates revised tests for type approvals to the new performance standard;

– 4 – 61108-1 © IEC:2003
c) changes include the need for a data output to the IEC 61162 series giving COG SOG and
UTC with validity marking, operation during interference conditions and improved failure
warnings.
This bilingual version (2013-01) corresponds to the monolingual English version, published in
2003-07.
The text of this standard is based on the following documents:
FDIS Report on voting
80/371/FDIS 80/373/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.
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
2005. 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.
61108-1 © IEC:2003 – 5 –
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) –

Part 1: Global positioning system (GPS) –
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