BOTH INTERNATIONAL & INLAND You are operating in restricted visibility and hear a signal of a rapidly ringing bell followed by the rapid sounding of a gong. Which vessel is required to sound this signal?

Correct Answer: Option C — 300-meter power-driven vessel at anchor

COLREGS Rule 35(g) requires vessels 100 meters or more in length at anchor to sound a bell for 5 seconds forward and a gong for 5 seconds aft. The rapid ringing of the bell followed by the gong identifies the vessel's significant length to other mariners.