Question 952 Rules of the Road

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BOTH INTERNATIONAL & INLAND Your vessel is underway in fog and you hear one prolonged and three short blasts. Which vessel would use this identity signal?

A A vessel being towed (manned)
B A vessel not under command
C A sailing vessel
D A vessel being towed (unmanned)
AI Explanation

The correct answer is A) A vessel being towed (manned). The International Regulations for Preventing Collisions at Sea (COLREGS) state that a vessel being towed shall sound one prolonged blast followed by three short blasts to indicate its status. This identity signal lets other vessels in the area know that the towed vessel is not fully under its own command and must be given special consideration. The other options are incorrect because a vessel not under command (B) uses a different signal of two prolonged blasts, a sailing vessel (C) has its own distinct signals, and an unmanned vessel being towed (D) would not be sounding any audible signals.

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