Navigation Problems USCG Question #459 (Set 13)

The true course from point A to point B is 317°. A SSW wind causes a 4° leeway, variation is 6°W and deviation is 1°E. What is the magnetic compass course to steer to make good the true course?

Official USCG Answer & Rule Citation

Correct Answer: Option A — 318°psc

A SSW wind pushes the vessel toward the NNE (022°). To maintain 317°T, steer 4° to the left (313°T). Converting to magnetic (add 6°W variation) gives 319°M. Subtracting 1°E deviation results in 318°psc. Always account for leeway before applying compass corrections.

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