A DSC Distress alert:

Correct Answer: Option C — Will always be sent on one or more of the DSC Distress frequencies.

Under GMDSS regulations, a DSC distress alert must be transmitted on one or more of the dedicated international DSC distress frequencies: VHF Channel 70, MF 2187.5 kHz, or the HF distress frequencies (4207.5, 6312, 8414.5, 12577, or 16804.5 kHz).