Question 359Navigation General

70% to pass

You are in a channel inbound from sea. A daymark used to mark a channel junction, when the preferred channel is to port will have the shape indicated by what letter in illustration D045NG below?

Diagram for USCG Navigation General: You are in a channel inbound from sea. A daymark used to mark a channel...
A A
B B
C C
D D
AI Explanation

The correct answer is D. According to the US Coast Guard regulations, a daymark used to mark a channel junction, when the preferred channel is to the port, will have a diamond shape. This diamond-shaped daymark is indicated by the letter D in illustration D045NG. The other answer choices (A, B, and C) do not represent the correct shape for a daymark indicating a preferred channel to the port at a channel junction.

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