BOTH INTERNATIONAL & INLAND You are underway in fog when you hear a signal of three strokes of a bell, a rapid ringing of the bell, and three more strokes of the bell. Which vessel is required to sound this signal?

Correct Answer: Option C — Aground

COLREGS Rule 35(d) states that a vessel aground shall give the bell signal for a vessel at anchor, preceded and followed by three separate and distinct strokes on the bell. This specific audible pattern alerts nearby vessels that the ship is stationary and grounded.