Question 424Rules of the Road90% to pass
INTERNATIONAL ONLY Vessels "A" and "B" are meeting on a river as shown in illustration D041RR below and will pass 1/4 mile apart. If you are on vessel "A", in addition to the sidelight, which other light(s) will you see on vessel "B"?
AI Explanation
The correct answer is C) Two white masthead lights in a vertical line.
According to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel that is underway, but not under command, or restricted in its ability to maneuver, must display two white masthead lights in a vertical line in addition to the required sidelights. Since the vessels are passing 1/4 mile apart, this indicates they are not overtaking or crossing, and are simply meeting on the river. Therefore, the vessel "B" would display the two white masthead lights in a vertical line, in addition to the sidelights.
The other options are incorrect because a special flashing yellow light is not a required navigation light, towing lights are only displayed by vessels engaged in towing operations, and there is no requirement for two white masthead lights in a horizontal line for a vessel meeting another vessel in this scenario.
Related Questions
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