Global maritime distress and safety system (GMDSS) - Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC) equipment - Operational and performance requirements, methods of testing and required test results

IEC 61097-4:2012(E) specifies the performance requirements and methods of testing for Inmarsat-C ship earth stations (SES) capable of transmitting and receiving direct-printing communications, and for enhanced group call (EGC) receivers, for use in the GMDSS and for use for long-range identification and tracking (LRIT).

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Status
Published
Publication Date
28-May-2012
Current Stage
PPUB - Publication issued
Start Date
29-May-2012
Completion Date
29-May-2012
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IEC 61097-4:2012 - Global maritime distress and safety system (GMDSS) - Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC) equipment - Operational and performance requirements, methods of testing and required test results
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IEC 61097-4
Edition 3.0 2012-05
INTERNATIONAL
STANDARD
Global maritime distress and safety system (GMDSS) –
Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC)
equipment – Operational and performance requirements, methods of testing
and required test results
IEC 61097-4:2012(E)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61097-4
Edition 3.0 2012-05
INTERNATIONAL
STANDARD
Global maritime distress and safety system (GMDSS) –
Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC)
equipment – Operational and performance requirements, methods of testing
and required test results
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
ICS 47.020.70 ISBN 978-2-83220-108-4

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – 61097-4 © IEC:2012(E)
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope ............................................................................................................................... 6

2 Normative references ....................................................................................................... 6

3 Performance requirements ............................................................................................... 7

3.1 Overview ................................................................................................................. 7

3.2 Non-operational requirements ................................................................................. 8

3.2.1 General ....................................................................................................... 8

3.2.2 Warning of radiation hazard ......................................................................... 8

3.2.3 Power supply changeover ............................................................................ 8

3.3 Operational requirements for ship earth stations ..................................................... 8

3.3.1 Capabilities ................................................................................................. 8

3.3.2 Ship station identity ..................................................................................... 8

3.3.3 Distress alerting .......................................................................................... 8

3.3.4 Position updating ......................................................................................... 9

3.4 Operational requirements for EGC receivers ........................................................... 9

3.4.1 Capabilities ................................................................................................. 9

3.4.2 General ..................................................................................................... 10

3.4.3 Position and area code updating ................................................................ 10

3.4.4 Indication of receipt of priority message .................................................... 10

3.4.5 Indication of tuning and synchronisation .................................................... 10

3.4.6 Printing selection ....................................................................................... 11

3.4.7 Printing device ........................................................................................... 11

3.5 Performance related requirements from IEC 60945 ............................................... 11

3.6 Other requirements ............................................................................................... 11

3.7 Long-range identification and tracking ................................................................... 12

3.7.1 General ..................................................................................................... 12

3.7.2 Capabilities ............................................................................................... 12

3.7.3 Functionality .............................................................................................. 13

3.7.4 Communication system .............................................................................. 14

4 Technical characteristics ................................................................................................ 14

4.1 Overview ............................................................................................................... 14

4.2 Environmental and electromagnetic compatibility requirement ............................... 14

4.3 Radiated spurious emissions ................................................................................. 15

5 Methods of testing and required test results ................................................................... 15

5.1 Overview ............................................................................................................... 15

5.1.1 General ..................................................................................................... 15

5.1.2 Performance requirements ........................................................................ 15

5.1.3 Technical characteristics ........................................................................... 16

5.2 Tests of non-operational requirements .................................................................. 16

5.3 Tests of operational requirements for ship earth stations ....................................... 16

5.3.1 Capabilities ............................................................................................... 16

5.3.2 Ship station identity ................................................................................... 16

5.3.3 Distress alerting ........................................................................................ 16

5.3.4 Position updating ....................................................................................... 16

5.4 Tests of operational requirements for EGC receivers ............................................. 17

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61097-4 © IEC:2012(E) – 3 –

5.4.1 Capabilities ............................................................................................... 17

5.4.2 General ..................................................................................................... 17

5.4.3 Position and area code updating ................................................................ 17

5.4.4 Indication of receipt of priority message .................................................... 17

5.4.5 Indication of tuning and synchronisation .................................................... 17

5.4.6 Printing selection ....................................................................................... 18

5.4.7 Printing device ........................................................................................... 18

5.5 Tests of performance related requirements from IEC 60945 .................................. 18

5.6 Tests of other requirements ................................................................................... 18

5.7 Long-range identification and tracking ................................................................... 18

5.7.1 General ..................................................................................................... 18

5.7.2 Capabilities ............................................................................................... 18

5.7.3 Functionality .............................................................................................. 19

5.7.4 Communication system .............................................................................. 19

5.8 Tests of technical characteristics ........................................................................... 20

5.8.1 Inmarsat tests ............................................................................................ 20

5.8.2 Tests for environmental and electromagnetic compatibility ........................ 20

Annex A (normative) Requirements relating to installation ................................................... 21

Annex B (normative) Radiated unwanted emissions ............................................................. 22

Annex C (informative) Inmarsat RTP schedule of tests......................................................... 25

Bibliography .......................................................................................................................... 29

Table 1 – Data to be transmitted from the shipborne equipment ............................................ 14

Table 2 – Environmental conditions ...................................................................................... 15

Table B.1 – Limits of unwanted emissions up to 1 000 MHz .................................................. 22

Table B.2 – Limits of unwanted emissions above 1 000 MHz ................................................ 23

Table B.3 – Limits of unwanted emission within the operating band with carrier-on ............... 24

Table C.1 – Phase I Inmarsat-C schedule of tests ................................................................. 25

Table C.2 – Phase I EGC receiver schedule of tests ............................................................. 27

Table C.3 – Phase II schedule of tests .................................................................................. 28

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– 4 – 61097-4 © IEC:2012(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GLOBAL MARITIME DISTRESS
AND SAFETY SYSTEM (GMDSS) –
Part 4: Inmarsat-C ship earth station and
Inmarsat enhanced group call (EGC) equipment –
Operational and performance requirements,
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

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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

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

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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

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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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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 61097-4 has been prepared by IEC technical committee 80:

Maritime navigation and radiocommunication equipment and systems.

This third edition cancels and replaces the second edition published in 2007. This edition

constitutes a technical revision.
The main changes with respect to the previous edition are:
– the IMO references and requirements have been updated to the new performance

standards for enhanced group call equipment adopted in 2010 as resolution MSC.306(87).

The new performance standards incorporate new requirements for an indication of ship’s

position which has not been updated (3.4.3) and an alarm for paper low condition (3.4.7).

---------------------- Page: 6 ----------------------
61097-4 © IEC:2012(E) – 5 –

These two requirements are, however, derived from Inmarsat documentation so there is

no technical change to equipment;

– a new subclause has been added (3.7) concerning long-range identification and tracking

(LRIT) to support IMO performance standards given in resolution MSC.263(84) adopted in

2008;

– references to Inmarsat documentation have been simplified by moving the content of

Tables 1, 2, 4 and 5 into a new Annex C;
– the text has been editorially updated to conform to the ISO/IEC Directives.
The text of this standard is based on the following documents:
FDIS Report on voting
80/659/FDIS 80/666/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.

A list of all parts of IEC 61097 series, published under the general title Global maritime

distress and safety system (GMDSS), can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site 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.
---------------------- Page: 7 ----------------------
– 6 – 61097-4 © IEC:2012(E)
GLOBAL MARITIME DISTRESS
AND SAFETY SYSTEM (GMDSS) –
Part 4: Inmarsat-C ship earth station and
Inmarsat enhanced group call (EGC) equipment –
Operational and performance requirements,
methods of testing and required test results
1 Scope

This part of IEC 61097 specifies the performance requirements and methods of testing for

Inmarsat-C ship earth stations (SES) capable of transmitting and receiving direct-printing

communications, and for enhanced group call (EGC) receivers, for use in the GMDSS and for

use for long-range identification and tracking (LRIT). The available variants are:

Class 0: An EGC receiver, either stand-alone or an element of a GMDSS installation in

accordance with the Inmarsat design and installation guidelines (DIGs) for
GMDSS installations.

Class 1: A basic SES providing shore-to-ship and ship-to-shore message transfer only.

Class 2: As class 1 but with EGC as an alternative to shore-to-ship transfer using a

shared receiver.
Class 3: As class 1 but with EGC using an independent receiver.

NOTE 1 The 34 session of the IMO Sub-Committee on Radiocommunications decided that class 2 equipment

would be adequate to provide sufficient availability for the reception of maritime safety information for the GMDSS.

The standard complies with IMO performance requirements stated in the normative

references, Inmarsat technical characteristics and test procedures, and IEC 60945 general

requirements except where modifications are explicitly stated in this standard. Technical

characteristics essential to GMDSS and LRIT operation as defined by the IMO are identified.

All text of this standard, whose wording is identical to that in IMO SOLAS Convention 1974 as

amended in 1988 and Resolutions A.807(19), MSC.263(84) and MSC.306(87) is printed in

italics and reference made to the Resolution/Recommendation and subclause number.

This standard covers equipment construction and testing. Matters relating to installation may

also be found in the Inmarsat Maritime design and installation guidelines (see Bibliography).

Those to be found in IMO Resolutions A.807(19), MSC.263(84) and MSC.306(87) are
reproduced in Annex A.

Responsibility for type approval of Inmarsat-C and Inmarsat-EGC is vested in Inmarsat by

IMO Resolutions A.807(19) and MSC.306(87) (see 3.2.1). Therefore, this standard does not

reproduce Inmarsat test procedures in full, but refers to where they are given in Inmarsat

documentation cited in the normative references to this standard (Annex C).

NOTE 2 For the purposes of this standard the terms Inmarsat-C, Inmarsat Standard-C, Standard-C refer to the

same equipment.
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, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.
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61097-4 © IEC:2012(E) – 7 –

IEC 60945:2002, Maritime navigation and radiocommunication equipment and systems –

General requirements – Methods of testing and required test results

IEC 61108 (all parts), Maritime navigation and radiocommunication equipment and systems

– Global navigation satellite systems (GNSS)

IEC 61162-1, Maritime navigation and radiocommunication equipment and systems – Digital

interfaces – Part 1: Single talker and multiple listeners

IMO, International Convention for the safety of life at sea (SOLAS),1974 as amended

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.807(19):1995, Performance Standards for INMARSAT-C ship earth

stations capable of transmitting and receiving direct-printing communications as amended by

Resolution MSC.68(68) Annex 4
IMO Resolution MSC.263(84):2008, Revised performance standards and functional
requirements for the long-range identification and tracking of ships.

IMO Resolution MSC.306(87):2010, Revised performance standards for enhanced group call

(EGC) equipment

Inmarsat, Inmarsat-C System definition manual (SDM) Volume 2 – Part 2, Application Note

2, Position reporting service

Inmarsat, Inmarsat-C System definition manual (SDM) Volume 2 – Part 2, Application Note

3, Application developers guide to data reporting and polling

Inmarsat, Inmarsat-C System definition manual (SDM) Volume 3 – Part 2, Chapter 2, Mobile

earth station technical requirements

Inmarsat, Inmarsat-C System definition manual (SDM) Volume 3 – Part 2, Chapter 5, Ship

earth station technical requirements

Inmarsat, Inmarsat-C System definition manual (SDM) Volume 3 – Part 2, Chapter 8,

Technical requirements for an EGC receiver

Inmarsat, Recommended test procedures (RTP) for the type approval of Inmarsat-C mobile

earth stations
3 Performance requirements
3.1 Overview

Subclauses 3.2 through 3.4 of this standard describe performance requirements directly

attributable to IMO Resolutions A.807(19) and MSC.306(87) as listed in the normative

references. Subclause 3.5 is provided to highlight those requirements of IMO Resolution

A.694(17) which are not included in the normal Inmarsat requirements for Inmarsat-C SES

type approval. Subclause 3.6 describes other requirements which are required to make the

equipment suitable for GMDSS applications. Subclause 3.7 describes performance

requirements attributable to IMO Resolution MSC.263(84) for long-range identification and

tracking.
---------------------- Page: 9 ----------------------
– 8 – 61097-4 © IEC:2012(E)
3.2 Non-operational requirements
3.2.1 General

(A.807(19) A1.1/MSC.306(87) A1.1) The Inmarsat Standard-C ship earth station installation

capable of transmitting and receiving direct-printing communications, and the enhanced group

call equipment to be used in the GMDSS shall comply with the general requirements set out in

Assembly resolution A.694(17) as detailed in IEC 60945 and this IEC standard.

(A.807(19) A2/MSC.306(87) 2) The ship earth station and the EGC equipment shall be type-

approved by Inmarsat and shall comply with the environmental conditions and
electromagnetic compatibility requirements specified in IEC 60945.
3.2.2 Warning of radiation hazard

(A.807(19) A4) In order to permit a warning of potential radiation hazards to be displayed in

appropriate locations, a label shall be attached to the radome indicating the distances

2 2 2

external to the radome at which radiation levels of 100 W/m , 25 W/m and 10 W/m exist.

However, the distances which are within the radome need not be indicated.

NOTE Due to the low transmitted power of Inmarsat-C transmitters (less than 16 dBW) and the omnidirectional

antenna used, this label is not normally required.
3.2.3 Power supply changeover
(See 5.2)

(A.807(19) A5.2/MSC.306(87) A4.2) Changing from one source of supply to another or any

interruption of up to 60 s duration of the supply of electrical energy shall not require the

equipment to be manually re-initialized and shall not result in loss of received messages

stored in the memory.
3.3 Operational requirements for ship earth stations
3.3.1 Capabilities
(See 5.3.1)

The equipment shall comply with regulations IV/8 through IV/10 of SOLAS 1974, as amended,

which prescribe the capabilities of Inmarsat ship earth stations to meet the GMDSS

requirements for ships in the various sea areas. The four capabilities are:

– (SOLAS IV/8.1.5.1/IV/9.1.3.3 and IV/10.1.4.3): means of initiating the transmission of ship-

to-shore distress alerts.

– (SOLAS IV/10.1.1.1): transmitting and receiving distress and safety communications

using direct-printing telegraphy.
– (SOLAS IV/10.1.1.2): initiating and receiving distress priority calls.

– (SOLAS IV/9.3.2/IV/10.1.1.4): transmitting and receiving general radiocommunications,

using either radiotelephony or direct-printing telegraphy.
NOTE In the case of this equipment only direct-printing telegraphy applies.
3.3.2 Ship station identity
(See 5.3.2)

(A.807(19) A3.1): No control external to the equipment shall be available for alteration of the

ship station identity.
3.3.3 Distress alerting
(See 5.3.3)
---------------------- Page: 10 ----------------------
61097-4 © IEC:2012(E) – 9 –

(A.807(19) A3.2): It shall be possible to initiate and make distress calls from the position from

which the ship is normally navigated and from at least one other position designated for

distress alerting.

(A.807(19) A3.3): A distress alert shall be activated only by means of a dedicated distress

button. This button shall not be any key of an ITU-T digital input panel or an ISO keyboard

provided on the equipment.
(A.807(19) A3.4): The dedicated distress button shall:
1) be clearly identified; and
2) be protected against inadvertent operation.

(A.807(19) A3.5): The distress alert initiation shall require at least two independent actions.

(A.807(19) A3.6): The equipment shall indicate the status of the distress alert transmission.

(A.807(19) A3.7): It shall be possible to interrupt and initiate distress messages at any time.

It shall be possible to select the content of, but not initiate a distress alert using the

equipment keyboard or other means, before depressing one of the dedicated buttons to

initiate the distress alert. It shall also be possible to activate an undesignated (see Note)

distress alert by depressing one of the buttons, at any time.

NOTE Undesignated – unspecified distress alert, i.e. the default setting. All other selectable alerts are

"designated".
3.3.4 Position updating
(See 5.3.4)

(A.807(19) A3.8): Facilities shall be provided to automatically update the ship’s position and

the time at which the position was determined from a suitable electronic position-fixing aid

which may be an integral part of the equipment. For equipment which does not have an

integral position-fixing aid, such facilities shall include a suitable interface conforming to

IEC 61162.

The integral electronic position-fixing aid shall comply with the applicable requirements of the

IEC 61108 series.

As a minimum, the interface shall support the sentences GNS, RMC and ZDA described in

IEC 61162-1.

(A.807(19) A3.9): Provision shall also be made for manual entry of position information and of

the time at which the position was determined.

(A.807(19) A3.10): An alarm shall be activated when no position data is received from the

electronic position-fixing aid or, in the case of manual input, the position information is over 4

hours old. Any position information not updated for more than 24 hours shall be clearly

identified. See also 3.4.3.

NOTE Subclause 3.3.7, which is referenced in the Inmarsat-C SDM, is 3.3.3 in this edition of this standard.

3.4 Operational requirements for EGC receivers
3.4.1 Capabilities
(See 5.4.1)
---------------------- Page: 11 ----------------------
– 10 – 61097-4 © IEC:2012(E)

The equipment shall comply with regulations IV/7 and IV/10 of SOLAS 1974, as amended,

which prescribe the capabilities of EGC receivers to meet the GMDSS requirements for ships

in the various sea areas. The two capabilities are:

– (SOLAS IV/7.1.5): a radio facility for reception of maritime safety information by the

Inmarsat enhanced group calling system.

– (SOLAS IV/10.1.1.3): an Inmarsat ship earth station capable of maintaining watch for

shore-to-ship distress alerts, including those directed to specifically defined geographical

areas.
3.4.2 General
(See 5.4.2)

(MSC.306(87) A1.2): The equipment shall be capable of producing a printed copy of received

information. Received EGC messages may be stored, for later printing with an indication to

the operator that the message has been received, except for the vital messages referred to

in A.3.2 which shal
...

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