What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received?

Correct Answer: Option C — The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received.

GMDSS regulations mandate that upon receiving a DSC distress alert, the radio operator must immediately monitor the associated radiotelephone frequency (such as VHF Channel 16) corresponding to the alert band. This enables the operator to assess voice communications, establish contact, and participate in coordinated rescue efforts.