Question 563Rules of the Road90% to pass
BOTH INTERNATIONAL & INLAND A vessel aground at night is required to show two red lights in a vertical line in addition to which lights?
AI Explanation
The correct answer is B) anchor lights.
According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel aground at night must display two red lights in a vertical line in addition to her normal navigation lights, which include sidelights and a stern light. These two red lights in a vertical line indicate that the vessel is at anchor, as per Rule 30 of the COLREGS and the corresponding Inland Navigation Rule.
The other options are incorrect because sidelights and a stern light (A) are the normal navigation lights required, not an additional requirement for a vessel aground. Options C and D describe different light configurations for vessels not under command and restricted in their ability to maneuver, respectively, which do not apply to a vessel aground.
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