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EGC, enhanced group call transmitted via the Inmarsat C system. The messages which are broadcast via this system are FleetNET or SafetyNET messages. The SafetyNET messages are used for transmission of MSI for areas outside the range of the NAVTEX stations within the coverage of Inmarsat satellites.


Emergency Position Indicating Radio Beacon - It is used as a distress alerting system, indicating to SAR authorities both the identity and position of a person or a vessel, which is in grave and imminent danger and requires immediate assistance.