Your ship received a Distress relay from the U.S. Coast Guard on DSC freq. 2187.5 kHz. You would acknowledge by radiotelephony on what frequency?

Correct Answer: Option C — 2182.0 kHz

The frequency 2182.0 kHz is the international radiotelephone distress and calling frequency for the MF band. When a distress relay is received via DSC on 2187.5 kHz, the operator must shift to 2182.0 kHz to monitor or communicate with the distressed vessel or coordinating coast station.