Question 513 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND Which light configuration may a sailing vessel exhibit while underway?

A a special flashing light at the bow
B a green light over a red light at the masthead
C a red light over a green light at the masthead
D two white lights in a vertical line at the stern
AI Explanation

The correct answer is C) a red light over a green light at the masthead. This configuration is specified in the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules as the required navigation lights for a sailing vessel underway. The red over green masthead lights indicate the vessel's orientation and direction of travel to other vessels in the vicinity. The other options are incorrect because A) a special flashing light is not a standard navigation light for a sailing vessel, B) a green over red light configuration is not used, and D) two white stern lights are for power-driven vessels, not sailing vessels.

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