2.5 Call telecommand and traffic information


Distress alerts


Other calls


Working channel information


2.6 VHF DSC facilities and usage


The Channel 70 instant alert selector


DSC data entry and display


Updating vessel position


Entering preset message


Entering traffic information


Reviewing received messages


DSC watchkeeping functions and controls


C. Operational procedures of the GMDSS and detailed practical operation of GMDSS subsystems and equipment.


C1. Search and Rescue (SAR) Procedures in the GMDSS 


1.1 Sea Areas and access to GMDSS facilities


1.2 The role of RCCs


1.3 Organisation of Search and Rescue


C2. Distress, urgency and safety communication procedures in the GMDSS


2.1 Distress communications via VHF


DSC equipment DSC distress alert


The definition of a distress alert


Transmission of a distress alert


Transmission of a shore-to-ship distress alert relay


Transmission of a distress alert by a station not itself in distress


Receipt and acknowledgement of VHF DSC distress alert


Acknowledgement procedure


Receipt and acknowledgement by a coast station


Receipt and acknowledgement by a ship station


Handling of distress alerts


Preparations for handling of distress traffic


Distress traffic terminology


On-scene communications


SAR operation

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