General Navigation USCG Question #173 (Set 6)

A survey (special purpose mark) buoy __________.

Official USCG Answer & Rule Citation

Correct Answer: Option D — None of the above

Special purpose marks, such as survey buoys, are typically yellow and may be unlighted. If they are lighted, they display a yellow light with a rhythm that does not conflict with lateral or cardinal marks. None of the specific light requirements listed in the options are mandatory for survey buoys.

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