Question 617 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND You are on a vessel heading due north and see the lights shown in illustration D051RR below, one point on your port bow. What direction could this vessel be heading in?

Rules of the Road Question 617 diagram
A SE
B NE
C SW
D NW
AI Explanation

The correct answer is A) SE. The illustration D051RR shows the navigation lights for a vessel heading in a southeasterly direction. According to the International Regulations for Preventing Collisions at Sea (COLREGS), when you see these navigation lights one point on your port bow, it indicates that the other vessel is heading in a southeasterly direction. The other answer choices are incorrect because they do not match the orientation of the navigation lights shown in the illustration. For example, if the vessel was heading northeast, you would see the red and green sidelights more directly on your port and starboard sides, respectively.

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