Question 234Navigation General

70% to pass

Which type of daymark is used to mark the starboard side of the channel when entering from sea?

A Green square
B Red triangle
C Black and white diamond
D Red and white octagon
AI Explanation

The correct answer is B) Red triangle. The red triangle is the standard daymark used to mark the starboard (right) side of a channel when entering from the sea. This is in accordance with the United States Aids to Navigation System, which is the standardized system for marking waterways in the US. The red triangle daymark indicates the right side of the navigable channel. The other answer choices are incorrect because: A) Green square marks the port (left) side, C) Black and white diamond is used for special marks, and D) Red and white octagon is used for regulatory or informational signs, not for channel markers.

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