Question 771 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND You are on watch and sight a vessel showing a high intensity all-round flashing red light. What does this light indicate?

A a vessel dredging
B a fishing vessel trolling
C a vessel laying submarine cable
D a WIG craft when taking off and landing
AI Explanation

The correct answer is D) a WIG craft when taking off and landing. The reasoning for this is that a high intensity all-round flashing red light indicates a WIG (Wing-In-Ground) craft, which is a type of maritime vessel that operates in ground effect, when it is taking off or landing. This lighting signal is specified in the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules. The other answer choices are incorrect because a dredging vessel would display different signals, a fishing vessel trolling would not display this light, and a vessel laying submarine cable would not use this particular lighting configuration.

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