Question 193Navigation General

70% to pass

Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a _______________.

A conical shape
B group-flashing light
C square topmark
D red light
AI Explanation

The correct answer is A) conical shape. Under the IALA-A Buoyage system, a port-hand buoy marking the port side of a channel when approaching from seaward must have a can or cylindrical shape, not a conical shape. This is because the conical shape is reserved for starboard-hand buoys. The other options (B, C, and D) are all possible characteristics of a port-hand buoy, but the shape must be can or cylindrical, not conical.

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