Question 728 Rules of the Road

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BOTH INTERNATIONAL & INLAND In illustration D023RR below which item shows the arc of visibility of a green sidelight?

Rules of the Road Question 728 diagram
A A
B B
C C
D D
AI Explanation

The correct answer is B. In illustration D023RR, item B shows the arc of visibility of a green sidelight. According to the International Regulations for Preventing Collisions at Sea (COLREGS), the arc of visibility for a green sidelight is from dead ahead to 112.5 degrees abaft the beam on the starboard side of the vessel. The other options are incorrect because: A shows the arc of visibility for a white masthead light, C shows the arc of visibility for a red sidelight, and D shows the arc of visibility for a white stern light.

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