International SafetyNET Manual, 2011 Edition (IB908E)

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Published Date

November 2011

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International SafetyNET Manual, 2011 Edition (IB908E)

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This Manual describes the structure and operation of the International SafetyNET Service. It is intended primarily for national Administrations and registered information providers, but may also be useful to the mariner who requires more operational information than is found in manufacturers’ equipment manuals.

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The third revision of the International SafetyNET Manual was circulated to IHO Member States, endorsed by COMSAR at its fourteenth session in March 2010 and subsequently approved by the MSC at its eighty-seventh session in May 2010. The amendments will come into force on 1 January 2012.


SafetyNET is an international automatic direct-printing satellite-based service for the promulgation of navigational and meteorological warnings, meteorological forecasts, Search and Rescue (SAR) information and other urgent safety-related messages – maritime safety information (MSI) – to ships. It has been developed as a safety service of the Inmarsat-C enhanced group call system to provide a simple and automated means of receiving MSI on board ships at sea. The message-selection features of SafetyNET receivers enable mariners to receive safety information broadcasts that are tailored to their particular needs.


1 General information

2 SafetyNET service

3 General features of the EGC system

4 Planning of new SafetyNET services

5 Changes to existing SafetyNET services

6 Operation of the International SafetyNET Service

7 Promulgation of maritime safety information

8 Message formatting and C codes

9 Monitoring of MSI broadcasts

10 Quality control of MSI broadcasts

11 Accessing the SafetyNET service

12 Land Earth Station functions

13 Receiving SafetyNET broadcasts

14 Charges for SafetyNET services


Annex 1 International SafetyNET Co-ordinating Panel


Annex 2 Authorization, certification and registration of SafetyNET information providers


Annex 3 The Inmarsat system


Annex 4 Operational guidance

Part A – Navigational warning services

Part B – Meteorological services

Part C – Search and rescue services

Part D – Piracy countermeasures broadcast messages

Part E – Repetition codes (C4)


Annex 5 EGC receiver specifications


Annex 6 Procedure for amending the International SafetyNET Manual

Title: International SafetyNET Manual, 2011 Edition (IB908E)
Number of Pages: 74
Product Code: MM1326K
ISBN: ISBN 13: 9789280115338, ISBN 10: 9280115332
Published Date: November 2011
Weight: 0.20 kg
Author: IMO

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