A buoy marking a wreck will show a(n) __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — white light FL (2) and a topmark of 2 black spheres
Isolated danger marks are identified by a topmark of two black spheres and a white light flashing in a group of two. This configuration warns mariners of a specific hazard, such as a wreck, that is surrounded by navigable water, as per IALA buoyage standards.
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