Which frequencies and modes are allocated for distress alerting in GMDSS?
Official USCG Answer & Rule Citation
Correct Answer: Option D — All of the above
GMDSS distress alerting utilizes multiple independent communication paths, including VHF Channel 70 DSC, specific MF/HF DSC frequencies, 406 MHz satellite EPIRBs, and Inmarsat mobile satellite services operating in the 1.6 GHz band.
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