BOTH INTERNATIONAL & INLAND A 200 meter vessel restricted in her ability to maneuver, at anchor, will sound which fog signal?

Correct Answer: Option D — One prolonged followed by two short blasts every 2 minutes

Rule 35(c) mandates that a vessel restricted in her ability to maneuver, whether underway or at anchor, shall sound one prolonged followed by two short blasts at intervals of not more than two minutes. This signal is required regardless of whether the vessel is anchored or making way.