Which of the following is NOT listed as a GMDSS telecommunications subsystem in the material?

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Multiple Choice

Which of the following is NOT listed as a GMDSS telecommunications subsystem in the material?

Explanation:
GMDSS telecommunications subsystems are the radio and satellite services used for distress and safety communications at sea. DSC is the digital calling system that initiates distress, safety, and urgent calls on VHF, MF, and HF channels. NAVTEX provides automated broadcasts of navigational and weather warnings to mariners. SITOR is a teletype-style data transmission method used within the GMDSS for text messages. SOSUS, the Sound Surveillance System, is an underwater hydrophone network for submarine detection and is not part of the GMDSS telecommunications framework. So SOSUS isn’t listed as a GMDSS subsystem.

GMDSS telecommunications subsystems are the radio and satellite services used for distress and safety communications at sea. DSC is the digital calling system that initiates distress, safety, and urgent calls on VHF, MF, and HF channels. NAVTEX provides automated broadcasts of navigational and weather warnings to mariners. SITOR is a teletype-style data transmission method used within the GMDSS for text messages. SOSUS, the Sound Surveillance System, is an underwater hydrophone network for submarine detection and is not part of the GMDSS telecommunications framework. So SOSUS isn’t listed as a GMDSS subsystem.

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