IEC 61097-10:1999

INTERNATIONAL IEC
STANDARD
61097-10
First edition
1999-06
Global maritime distress and safety system
(GMDSS) –
Part 10:
Inmarsat-B ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
Système mondial de détresse et de sécurité
en mer (SMDSM) –
Partie 10: Matériel destiné aux stations terrestres
des navires de type Inmarsat-B –
Exigences d'exploitation et de fonctionnement,
méthodes d'essai et résultats d'essai exigés
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are
available. 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.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
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 to be found at the following IEC sources:
• IEC web site*
•
Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
61097-10
First edition
1999-06
Global maritime distress and safety system
(GMDSS) –
Part 10:
Inmarsat-B ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
Système mondial de détresse et de sécurité
en mer (SMDSM) –
Partie 10: Matériel destiné aux stations terrestres
des navires de type Inmarsat-B –
Exigences d'exploitation et de fonctionnement,
méthodes d'essai et résultats d'essai exigés
 IEC 1999  Copyright - all rights reserved
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International Electrotechnical Commission
For price, see current catalogue

– 2 – 61097-10 © IEC:1999(E)
CONTENTS
Page
FOREWORD . 3
Clause
1 Scope.4
2 Normative references.4
3 Definitions and abbreviations. 5
3.1 Definitions.5
3.2 Abbreviations.6
4 General and operational requirements . 6
4.1 General.6
4.2 General requirements.6
4.3 Operational requirements for Inmarsat-B maritime class 1 SES . 7
4.4 Inter-operability.8
4.5 Interfaces.8
4.6 Safety. 8
4.7 Equipment manual.8
4.8 Marking and identification. 9
4.9 Maintenance.9
5 Technical characteristics.9
5.1 Purpose.9
5.2 General.9
5.3 Power supply.10
6 Methods of testing and required test results. 10
6.1 General.10
6.2 Performance testing.10
6.3 Environmental testing.12
6.4 Electromagnetic compatibility.12
6.5 General tests.13
6.6 Operational tests.13
6.7 Power supply.14
Annex A (normative) Requirements relating to installation. 15
Annex B (informative) Reception of maritime safety information (MSI) . 16
Annex C (informative) Inmarsat-B spot beam scanning . 18

61097-10 © IEC:1999(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 10: Inmarsat-B ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
FOREWORD
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 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.
International Standard IEC 61097-10 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
The text of this standard is based on the following documents:
FDIS Report on voting
80/216/FDIS 80/231/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.
Annex A forms an integral part of this standard.
Annexes B and C are for information only.
A bilingual version of this standard may be issued at a later date.

– 4 – 61097-10 © IEC:1999(E)
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 10: Inmarsat-B ship earth station equipment –
Operational and performance requirements,
methods of testing and required test results
1 Scope
This part of IEC 61097 specifies the minimum operational and performance requirements,
technical characteristics, methods of testing and required test results for Inmarsat-B maritime
class 1 ship earth stations (SES), capable of transmitting and receiving distress and safety
communications using telephony and direct-printing telegraphy, as required by regulation IV /
10.1 and 14.1 of the 1988 amendments to the 1974 International Convention for the Safety of
Life at Sea (SOLAS), for use in the GMDSS.
In order to meet the carriage requirements of the GMDSS in respect of receipt of SafetyNET
broadcasts, it is necessary to install an additional EGC receiver or a combined Inmarsat-
C/EGC receiver.
This standard takes account of IMO Resolution A.694, to which IEC 60945 is associated. When
a requirement in this standard is different from IEC 60945, the requirement in this standard
takes precedence.
This standard incorporates the performance standards of IMO Resolution A.808. It also
incorporates the relevant ITU Radio regulations.
This standard does not incorporate the Inmarsat system requirements needed for Inmarsat
type approval. For these, the latest edition of the Inmarsat-B system definition manual (SDM)
shall be consulted. When a requirement in this standard is different from one in the Inmarsat-B
SDM, reference shall be made to the most recent IMO and ITU applicable documents to
resolve the difficulty.
NOTE – All text of this standard, the wording of which is identical to that in the IMO SOLAS Convention 1974 as
amended and IMO Resolution A.808, is printed in italics and it is followed by the resolution or recommendation and
paragraph number indicated between brackets.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61097. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 61097 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60945:1996, Maritime navigation and radiocommunication equipment and systems –
General requirements – Methods of testing and required test results
IEC 61162-1:1995, 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

61097-10 © IEC:1999(E) – 5 –
IMO Resolution A.694:1991, 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.808:1995, Performance standards for ship earth stations capable of two-way
communications
IMO MSC Circular 862:1998, Clarifications of certain requirements in IMO performance
standards for GMDSS equipment
ITU:1997, Radio Regulations
ITU-R SM.329-7:1997, Spurious emissions
Inmarsat:1997, Inmarsat-B system definition manual (SDM) – Issue 3.0 including change note
CN 13 – technical performance requirements (module 2, part I) and type approval procedures
(module 2, part II)
Inmarsat:1997, Inmarsat-B design and installation guidelines (DIGS)
3 Definitions and abbreviations
3.1 Definitions
For the purpose of this standard, the following definitions apply:
3.1.1
L-band
the frequency band in the range 1,4 GHz to 1,7 GHz allocated to the mobile satellite service
and in which the EUT transmits and receives
3.1.2
LES simulator
an item of test equipment designed to simulate the combined operation of an Inmarsat satellite
and an Inmarsat-B land earth station. The LES simulator interfaces to the EUT at L-band,
either by means of a small antenna or via a coaxial cable. It permits voice and telex calls to be
set up in accordance with the relevant Inmarsat-B protocols
3.1.3
SafetyNET
a service provided over a dedicated Inmarsat-C carrier, for the dissemination of maritime
safety information, such as distress alerts, weather forecasts and coastal warnings
3.1.4
carrier to noise density ratio
the ratio of unmodulated carrier power to noise power normalised to a 1 Hz bandwidth
3.1.5
performance check
in this s
...