Question 67Navigation General

70% to pass

What is the compass course of a vessel heading NNW?

A 274.5°
B 292.0°
C 315.5°
D 337.5°
AI Explanation

The correct answer is D) 337.5°. The compass course of a vessel heading NNW (North-North-West) is 337.5°. This is because NNW is 22.5° west of north, and the cardinal directions are spaced 45° apart on the compass. Therefore, the compass course for a heading of NNW is 360° (north) minus 22.5°, which equals 337.5°. The other answer choices are incorrect because A) 274.5° is west of north, B) 292.0° is west of north, and C) 315.5° is northwest, which is not the same as NNW.

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