BOTH INTERNATIONAL & INLAND If underway in low visibility and sounding fog signals, what changes would you make in the fog signal IMMEDIATELY upon losing the power plant and propulsion?

Correct Answer: Option B — Begin sounding one prolonged blast followed by two short blasts at two minute intervals.

Rule 35(c) requires a vessel restricted in her ability to maneuver, including one that has lost propulsion, to sound one prolonged followed by two short blasts at intervals of not more than two minutes. This signal alerts other vessels that you are no longer under command and cannot maneuver effectively.