Question 687 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND Which is a characteristic of a "flashing light"?

A is yellow in color
B is visible over an arc of the horizon of not less than 180° nor more than 225°
C flashes at regular intervals at a frequency of 120 flashes or more per minute
D All of the above
AI Explanation

The correct answer is C) flashes at regular intervals at a frequency of 120 flashes or more per minute. This is the correct answer because a defining characteristic of a "flashing light" is that it flashes at a frequency of 120 flashes or more per minute, according to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules. The other options are incorrect because they do not accurately describe the characteristics of a flashing light. Option A is incorrect as the color of a flashing light is not specified. Option B is incorrect as the arc of visibility for a flashing light is not limited to 180-225 degrees. Option D is incorrect as none of the other options are characteristic of a flashing light.

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