BOTH INTERNATIONAL & INLAND You are proceeding under sail with the auxiliary engine running and the propeller engaged. Which statement is TRUE?

Correct Answer: Option C — In fog you must sound one prolonged blast at two minute intervals when making way.

Rule 35(c) requires a vessel under sail to sound one prolonged and two short blasts. However, a vessel proceeding under sail with the engine engaged is considered a power-driven vessel. Therefore, she must sound one prolonged blast at intervals of not more than two minutes when making way in fog.