Question 376Navigation General

70% to pass

You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which of the following is TRUE?

A The yellow square is in error and it should be a yellow triangle.
B This buoy marks the end of the ICW in that geographic area.
C The yellow is retro-reflective material used to assist in sighting the buoy at night.
D You should leave the buoy on your port hand.
AI Explanation

The correct answer is D) You should leave the buoy on your port hand. The red nun buoy with a yellow square indicates that this is a port-hand (red) channel marker along the Intracoastal Waterway. When traveling southbound on the ICW, you should pass this buoy keeping it on your port (left) side. This is in accordance with the Uniform State Waterway Marking System and the conventional rules of navigation. The other answer choices are incorrect. The yellow square is not an error, as it is a valid marking for an ICW port-hand buoy. The buoy does not mark the end of the ICW in that area. The yellow color is not retro-reflective material, but rather a standard daymark color used to identify the type of buoy.

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