Question 917 Rules of the Road

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BOTH INTERNATIONAL & INLAND Which fog signal is a power-driven vessel making way through the water required to sound?

A One prolonged blast at intervals of not more than two minutes
B Two prolonged blasts at intervals of not more than one minute
C Two prolonged blasts at intervals of not more than two minutes
D One prolonged blast at intervals of not more than one minute
AI Explanation

The correct answer is A) One prolonged blast at intervals of not more than two minutes. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a power-driven vessel making way through the water is required to sound one prolonged blast at intervals of not more than two minutes as its fog signal. This is specified in Rule 35(a) of both the international and inland navigation rules. The other options are incorrect because they do not match the requirements set forth in the regulations. For example, options B and C specify two prolonged blasts, which is not the correct fog signal for a power-driven vessel making way through the water.

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