BOTH INTERNATIONAL & INLAND You hear the firing of a gun at one minute intervals from another vessel. What does this signal indicate?

Correct Answer: Option A — The vessel is in distress

Annex IV, paragraph 1(c) of the COLREGS and 33 CFR 83.37 identify the firing of a gun or other explosive signal at intervals of about one minute as a recognized distress signal. This high-intensity acoustic signal is intended to attract immediate attention from nearby vessels or shore stations.