What may be used as a homing signal by the search and rescue vessels in the immediate vicinity of the ship in Distress?

Official USCG Answer & Rule Citation

Correct Answer: Option C — A 121.5 MHz emergency transmitter in a satellite EPIRB.

The integrated 121.5 MHz aeronautical emergency transmitter within a satellite EPIRB acts as an effective homing signal, enabling arriving search and rescue aircraft and vessels equipped with direction finders to home directly onto the distress site.

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