Question 965 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND While underway your vessel enters fog. You stop your engines and the vessel is dead in the water. Which fog signal should you sound?

A Two prolonged blasts every two minutes
B One prolonged blast every two minutes
C One prolonged and three short blasts every two minutes
D Three short blasts every two minutes
AI Explanation

The correct answer is A) Two prolonged blasts every two minutes. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel that is underway but stopped and made fast to the ground in fog must sound two prolonged blasts at intervals of not more than two minutes. This signal indicates that the vessel is not under command and unable to maneuver as required by the rules. The other options are incorrect because they do not match the specific signal required for a vessel that is stopped and made fast to the ground in fog. Option B is for a vessel underway but stopped, option C is for a vessel not under command, and option D is for a vessel restricted in its ability to maneuver.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG Navigation Center
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