Question 711Rules of the Road90% to pass
BOTH INTERNATIONAL & INLAND Which of the shapes shown in illustration D016RR below must you show when at anchor?

AI Explanation
The correct answer is A.
According to the International and Inland Navigation Rules, vessels at anchor must display a single all-round white light, which corresponds to shape A in the illustration. This light is required to be visible all around the horizon for a distance of at least 2 miles.
The other shapes in the illustration (B, C, and D) are not the appropriate signals for a vessel at anchor. Shape B represents a vessel underway, shape C represents a vessel restricted in its ability to maneuver, and shape D represents a vessel constrained by its draft.
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