A preferred-channel buoy will show a __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — composite group-flashing (2 + 1) red or green light
In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'A preferred-channel buoy will show a', the verified fact is: 'composite group- flashing (2 + 1) white light'.
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