GMDSS is an enhanced Search And Rescue (SAR) system using automation and advanced satellite and HF/MF/VHF radio communication technology.
The System is a combination of:-
Radiotelex (Direct Printing Telegraphy);
Survival Craft Radar Transponders (SARTs);
Data transmission; and
Digital Selective Calling (DSC).
Some companies are manufacturing the full range of GMDSS equipment to be accessed from one keyboard and one VDU (screen).
GMDSS provides for the rapid alerting of SAR authorities and vessels and the efficient deployment of coordinated SAR services.