Question 540 Rules of the Road

The correct answer is A) One short, one prolonged, and one short blast. This is the correct answer because according to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel at anchor in fog is required to sound this signal to warn other vessels of its position. This signal indicates that the vessel is at anchor. The other options are incorrect because B) is the signal for a vessel underway but not making way, C) is the signal for a vessel in distress, and D) is the signal for a vessel underway in fog.