Question 717 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND A vessel at anchor will show which shape?

A cylinder
B cone
C ball
D double cone, apexes together
AI Explanation

The correct answer is C) ball. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel at anchor must display a single black ball shape during the day. This is specified in Rule 30 of both the international and inland navigation rules. The ball shape indicates to other vessels in the area that the anchored vessel is not underway and is securely moored. The other answer choices are incorrect because a cylinder, cone, or double cone shape would not be the proper day shape for an anchored vessel under the navigation rules.

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