Coast Guard Exams
Question 372Rules of the Road90% to pass

INLAND ONLY What is the required whistle signal for a power-driven vessel leaving a dock or berth?

AI Explanation
The correct answer is B) One prolonged blast. According to the Inland Navigation Rules, Rule 34(a), the required whistle signal for a power-driven vessel leaving a dock or berth is one prolonged blast. This signals to other vessels in the area that the vessel is about to get underway. The other answer choices are incorrect because: A) One short blast is the signal for crossing another vessel's bow, C) Two short blasts is the signal for reversing direction, and D) Two prolonged blasts is the signal for a vessel not under command or restricted in its ability to maneuver.

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