Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?

Question

Accepted Answer

Answers a) and c ) are both correct.

Answer

For non-GMDSS ships, to maximize the chances for other vessels to receive those communications.

Answer

For GMDSS or DSC-equipped ships, to maximize the chances for other vessels to receive those communications following the transmission of a DSC call of the correct priority.

Answer

To enable an RCC or Coast station to only hear communications from the vessel actually in distress.

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