Question 439 Rules of the Road
90% to passINTERNATIONAL ONLY You have sighted three red lights in a vertical line on another vessel dead ahead at night. Which vessel would display these lights?
A
A vessel constrained by her draft
B
A vessel aground
C
A vessel dredging
D
A vessel moored over a wreck
AI Explanation
You are correct, the answer is A) A vessel constrained by her draft. The reason this is the correct answer is that according to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel constrained by her draft is required to display three all-round red lights in a vertical line at night to indicate her status. The other answer choices are incorrect because they do not correspond to the lighting requirement for a vessel constrained by draft. A vessel aground, a vessel dredging, or a vessel moored over a wreck would have different lighting configurations.
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