Which cardinal quadrant is represented by the topmark in illustration D024NG below?
Official USCG Answer & Rule Citation
Correct Answer: Option B — Western
Cardinal marks use topmarks to indicate the direction of safe water. Two cones pointing toward each other (base to base) represent the Western quadrant. This system, defined in the IALA Maritime Buoyage System, ensures mariners can safely navigate around hazards by identifying the safe side of the buoy.
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