IEC 61097-6:2005

Global maritime distress and safety system (GMDSS) - Part 6: Narrowband direct-printing telegraph equipment for the reception of navigational and meteorological warnings and urgent information to ships (NAVTEX)

Specifies the minimum performance requirements, technical characteristics and type-testing requirements for narrowband telegraph equipment for the reception of navigational and meteorological information as required by the International Convention for Safety of Life at Sea (SOLAS), and which is associated with IEC 60945. Also incorporates the performance standards of the relevant IMO resolutions and conforms with the ITU-R regulations where applicable.

General Information

• Status: Published
• Publication Date: 06-Dec-2005
• 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 8 - TC 80/WG 8
• Current Stage: PPUB - Publication issued
• Start Date: 30-Apr-2006
• Completion Date: 07-Dec-2005

Relations

• Amended By: IEC 61097-6:2005/AMD1:2011 - Amendment 1 - Global maritime distress and safety system (GMDSS) - Part 6: Narrowband direct-printing telegraph equipment for the reception of navigational and meteorological warnings and urgent information to ships (NAVTEX)
• Effective Date: 05-Sep-2023
• Amended By: IEC 61097-6:2005/AMD2:2019 - Amendment 2 - Global maritime distress and safety system (GMDSS) - Part 6: Narrowband direct-printing telegraph equipment for the reception of navigational and meteorological warnings and urgent information to ships (NAVTEX)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61097-6
Second edition
2005-12
Global maritime distress and
safety system (GMDSS) –
Part 6:
Narrowband direct-printing telegraph equipment
for the reception of navigational and
meteorological warnings and urgent
information to ships (NAVTEX)
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.
Further information on IEC publications
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thus ensuring that the content reflects current technology. Information relating to
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publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
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INTERNATIONAL IEC
STANDARD 61097-6
Second edition
2005-12
Global maritime distress and
safety system (GMDSS) –
Part 6:
Narrowband direct-printing telegraph equipment
for the reception of navigational and
meteorological warnings and urgent
information to ships (NAVTEX)
 IEC 2005  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 X
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61097-6  IEC:2005(E)
CONTENTS
FOREWORD.4
INTRODUCTION.7
1 Scope.8
2 Normative references .8
3 Definitions and abbreviations.9
3.1 Definitions .9
3.2 Abbreviations .9
4 Performance requirements .10
4.1 General .10
4.2 General characteristics.10
4.3 Specific characteristics.11
4.4 Interfaces .13
4.5 Receiver.14
4.6 Display.14
4.7 Integral printer.16
4.8 NAVTEX message memory .16
4.9 Power supplies.17
4.10 Source of UTC .17
5 Test conditions .18
5.1 General .18
5.2 Performance test.19
5.3 Performance check.19
5.4 Normal and extreme conditions .19
5.5 Standard test signal .20
5.6 Standard test file .21
5.7 Arrangement for test signal applied to the receiver input .21
5.8 Artificial antennas.21
5.9 Measurement uncertainty .21
5.10 Interpretations of measurement results.22
5.11 Conducted and radiated RF immunity tests exclusion bands.22
5.12 Narrow band responses on receivers.22
6 Environmental tests required .22
7 Serial interface tests.23
7.1 INS input electrical tests.23
7.2 INS input performance tests .23
7.3 INS output electrical tests.23
7.4 INS output performance tests .23
7.5 Printer output electrical tests .23
7.6 Printer output performance tests .24
8 General and signal processing tests .24
8.1 Exclusion of stations .24
8.2 Exclusion of message categories.24
8.3 Receiver test facility .25
8.4 Search and rescue (SAR) alarm provision and reset.25
8.5 Additional alarms.25

61097-6  IEC:2005(E) – 3 –
9 Receiver tests .25
9.1 Call sensitivity .26
9.2 Interference rejection and blocking immunity .26
9.3 Co-channel rejection .27
9.4 Intermodulation .27
9.5 Off-frequency transmitter.28
9.6 Simultaneous operation on several receive frequencies.28
9.7 Protection of input circuits .28
10 Printer tests.29
10.1 Basic requirements.29
10.2 Paper roll end alarm and storage inhibition.29
10.3 Automatic line feed indication and paper feed .29
10.4 Mutilated character indication.30
10.5 Tests of technical characteristics (ITU-R Recommendation M.540).30
11 Memory tests.31
11.1 Internal storage, message tagging and erasure of oldest message
identifications .31
11.2 Erasure of message identifications/storage time.32
11.3 Storage of message identifications .33
11.4 Reception of messages with character errors .33
11.5 Unsatisfactory reception.34
11.6 Power-off check .34
11.7 Brown-out test.35
11.8 UTC handling check .35
12 Miscellaneous tests .36
12.1 Spurious emissions .36
12.2 Equipment manuals – checks of the manufacturer's documentation.36
12.3 Marking and identification.36

Annex A (informative) Block diagrams of NAVTEX systems .37
Annex B (normative) Definition of satisfactory reception of a message.39
Annex C (informative) IEC 61162 sentences for NAVTEX operation.40
Annex D (normative) Manufacturer’s declarations/equipment manual.43

Figure A.1 – EUT with an integral printing device.37
Figure A.2 – EUT with an integral display device .37
Figure A.3 – EUT black box receiver.38

Table 1 – Alarm conditions signaled using the ALR sentence formatter.13
Table 2 – Extreme power supply variation.19
Table 3 – Unwanted signal levels.26
Table 4 – Intermodulation frequency pairs .27

– 4 – 61097-6  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GLOBAL MARITIME DISTRESS AND
SAFETY SYSTEM (GMDSS) –
Part 6: Narrowband direct-printing telegraph equipment
for the reception of navigational and meteorological warnings
and urgent information to ships (NAVTEX)

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,
Publicly Available Specifications (PAS) 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 near
...

IEC 61097-6 ®
Edition 2.2 2019-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Global maritime distress and safety system (GMDSS) –
Part 6: Narrowband direct-printing telegraph equipment for the reception
of navigational and meteorological warnings and urgent information to ships
(NAVTEX)
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
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variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

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IEC 61097-6 ®
Edition 2.2 2019-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Global maritime distress and safety system (GMDSS) –

Part 6: Narrowband direct-printing telegraph equipment for the reception

of navigational and meteorological warnings and urgent information to ships

(NAVTEX)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.70 ISBN 978-2-8322-7177-3

IEC 61097-6 ®
Edition 2.2 2019-07
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Global maritime distress and safety system (GMDSS) –
Part 6: Narrowband direct-printing telegraph equipment for the reception
of navigational and meteorological warnings and urgent information to ships
(NAVTEX)
– 2 – IEC 61097-6:2005+AMD1:2011
+AMD2:2019 CSV  IEC 2019
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
INTRODUCTION to Amendment 1 . 8
INTRODUCTION to Amendment 2 . 8
1 Scope . 9
2 Normative references . 9
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 10
4 Performance requirements . 11
4.1 General . 11
4.2 General characteristics . 11
4.3 Specific characteristics . 12
4.3.1 B and B characters . 12
1 2
4.3.2 B and B characters . 12
3 4
4.3.3 Preamble . 12
4.3.4 Repetition of printing/display . 12
4.3.5 Mandatory printing/display . 13
4.3.6 Reception of messages with character errors . 13
4.3.7 Controls and indicators . 13
4.3.8 Programmable control memories . 13
4.3.9 Alarms . 13
4.3.10 Test facilities . 14
4.4 Interfaces . 15
4.5 Receiver . 15
4.5.1 Number of receivers . 15
4.5.2 Receive frequencies . 15
4.5.3 Sensitivity . 16
4.6 Display . 16
4.6.1 General . 16
4.7 Integral printer . 17
4.7.1 General . 17
4.8 NAVTEX message memory . 18
4.8.1 Equipment without integral printers . 18
4.8.2 Equipment with integral printer . 18
4.9 Power supplies . 19
4.10 Source of UTC . 19
5 Test conditions . 19
5.1 General . 19
5.2 Performance test . 20
5.3 Performance check. 20
5.4 Normal and extreme conditions . 20
5.4.1 Normal test conditions . 20
5.4.2 Extreme test conditions . 20
5.4.3 Excessive test conditions. 21

+AMD2:2019 CSV  IEC 2019
5.5 Standard test signal . 21
5.6 Standard test file . 22
5.7 Arrangement for test signal applied to the receiver input . 22
5.8 Artificial antennas . 22
5.9 Measurement uncertainty . 23
5.10 Interpretations of measurement results . 23
5.11 Conducted and radiated RF immunity tests exclusion bands . 23
5.11.1 Exclusion bands for receivers . 23
5.12 Narrow band responses on receivers . 23
6 Environmental tests required . 24
7 Serial interface tests . 24
7.1 INS input electrical tests . 24
7.1.1 Method of test . 24
7.1.2 Required results . 24
7.2 INS input performance tests . 24
7.2.1 Method of measurement . 24
7.2.2 Required results . 24
7.3 INS output electrical tests. 24
7.3.1 Method of test . 24
7.3.2 Required results . 24
7.4 INS output performance tests . 24
7.4.1 Method of measurement . 24
7.4.2 Required results . 25
7.5 Printer output electrical tests . 25
7.5.1 Method of test . 25
7.5.2 Required results . 25
7.6 Printer output performance tests . 25
7.6.1 Method of measurement . 25
7.6.2 Required results . 25
7.7 BAM interface performance tests . 25
7.7.1 Method of measurement . 25
7.7.2 Required results . 25
8 General and signal processing tests . 26
8.1 Exclusion of stations . 26
8.1.1 Method of measurement . 26
8.1.2 Results required . 26
8.2 Exclusion of message categories. 26
8.2.1 Method of measurement . 26
8.2.2 Results required . 26
8.3 Receiver test facility . 26
8.3.1 Method of measurement . 26
8.3.2 Results required . 26
8.4 Search and rescue (SAR) alarm provision and reset . 26
8.4.1 Method of measurement . 26
8.4.2 Results required . 27
...

IEC 61097-6 ®
Edition 2.1 2012-01
INTERNATIONAL
STANDARD
colour
inside
Global maritime distress and safety system (GMDSS) –
Part 6: Narrowband direct-printing telegraph equipment for the reception of
navigational and meteorological warnings and urgent information to ships
(NAVTEX)
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: [e-mail].

IEC 61097-6 ®
Edition 2.1 2012-01
INTERNATIONAL
STANDARD
colour
inside
Global maritime distress and safety system (GMDSS) –

Part 6: Narrowband direct-printing telegraph equipment for the reception of

navigational and meteorological warnings and urgent information to ships

(NAVTEX)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
CN
ICS 47.020.70 ISBN 978-2-88912-905-8

– 2 – 61097-6  IEC:2005+A1:2011(E)
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
INTRODUCTION (to Amendment 1) . 6

1 Scope . 7
2 Normative references . 7
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 8
4 Performance requirements . 9
4.1 General . 9
4.2 General characteristics . 9
4.3 Specific characteristics . 10
4.4 Interfaces . 12
4.5 Receiver . 13
4.6 Display . 13
4.7 Integral printer . 15
4.8 NAVTEX message memory . 15
4.9 Power supplies . 16
4.10 Source of UTC . 16
5 Test conditions . 17
5.1 General . 17
5.2 Performance test . 18
5.3 Performance check. 18
5.4 Normal and extreme conditions . 18
5.5 Standard test signal . 19
5.6 Standard test file . 20
5.7 Arrangement for test signal applied to the receiver input . 20
5.8 Artificial antennas . 20
5.9 Measurement uncertainty . 20
5.10 Interpretations of measurement results . 21
5.11 Conducted and radiated RF immunity tests exclusion bands . 21
5.12 Narrow band responses on receivers . 21
6 Environmental tests required . 21
7 Serial interface tests . 22
7.1 INS input electrical tests . 22
7.2 INS input performance tests . 22
7.3 INS output electrical tests. 22
7.4 INS output performance tests . 22
7.5 Printer output electrical tests . 22
7.6 Printer output performance tests . 23
8 General and signal processing tests . 23
8.1 Exclusion of stations . 23
8.2 Exclusion of message categories. 23

61097-6  IEC:2005+A1:2011(E) – 3 –
8.3 Receiver test facility . 24
8.4 Search and rescue (SAR) alarm provision and reset . 24
8.5 Additional alarms . 24
9 Receiver tests . 24
9.1 Call sensitivity . 25
9.2 Interference rejection and blocking immunity . 25
9.3 Co-channel rejection . 26
9.4 Intermodulation . 26
9.5 Off-frequency transmitter . 27
9.6 Simultaneous operation on several receive frequencies. 27
9.7 Protection of input circuits . 27
10 Printer tests . 28
10.1 Basic requirements . 28
10.2 Paper roll end alarm and storage inhibition . 28
10.3 Automatic line feed indication and paper feed . 28
10.4 Mutilated character indication . 29
10.5 Tests of technical characteristics (ITU-R Recommendation M.540) . 29
11 Memory tests . 30
11.1 Internal storage, message tagging and erasure of oldest message
identifications . 30
11.2 Erasure of message identifications/storage time . 31
11.3 Storage of message identifications . 32
11.4 Reception of messages with character errors . 32
11.5 Unsatisfactory reception . 33
11.6 Power-off check . 33
11.7 Brown-out test . 34
11.8 UTC handling check . 34
12 Miscellaneous tests . 35
12.1 Spurious emissions . 35
12.2 Equipment manuals – checks of the manufacturer's documentation . 35
12.3 Marking and identification . 35

Annex A (informative) Block diagrams of NAVTEX systems . 36
Annex B (normative) Definition of satisfactory reception of a message . 38
Annex C (informative) IEC 61162 sentences for NAVTEX operation . 39
Annex D (normative) Manufacturer’s declarations/equipment manual . 42

Figure A.1 – EUT with an integral printing device . 36
Figure A.2 – EUT with an integral display device . 36
Figure A.3 – EUT black box receiver . 37

Table 1 – Alarm conditions signaled using the ALR sentence formatter . 12
Table 2 – Extreme power supply variation . 18
Table 3 – Unwanted signal levels . 25
Table 4 – Intermodulation frequency pairs . 26

– 4 – 61097-6  IEC:2005+A1:2011(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GLOBAL MARITIME DISTRESS AND
SAFETY SYSTEM (GMDSS) –
Part 6: Narrowband direct-printing telegraph equipment
for the reception of navigational and meteorological warnings
and urgent information to ships (NAVTEX)

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,
Publicly Available Specifications (PAS) 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 organizat
...