Question 650 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. This vessel could be heading in what direction?

Rules of the Road Question 650 diagram
A SW
B NW
C NE
D SE
AI Explanation

The correct answer is D) SE. The lights shown in illustration D051RR indicate that the other vessel is heading in a south-easterly (SE) direction. According to the International and Inland Navigation Rules, the side lights (red and green) on a vessel are visible from right ahead to 22.5 degrees abaft the beam (behind the beam) on their respective sides. Seeing the lights one point on your port bow means the other vessel is heading in a south-easterly direction relative to your own vessel. The other options are incorrect because a vessel heading in a south-westerly (SW), north-westerly (NW), or north-easterly (NE) direction would not have its side lights visible one point on your port bow.

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