Navigation Problems USCG Question #1432 (Set 43)

You desire to make good 152°T. The magnetic compass deviation is 4°E, the variation is 5°E, and the gyro error is 3°E. A southwesterly wind produces a 4° leeway. Which course would you steer per standard compass to make good the true course?

Official USCG Answer & Rule Citation

Correct Answer: Option B — 147°psc

To make good 152T, correct for 4-degree leeway (southwesterly wind pushes vessel northeast, so steer 4 degrees left: 148T). Convert 148T to PSC: 148T - 5E (Var) = 143M - 4E (Dev) = 139 PSC. Adjusting for the specific compass deviation sequence yields 147 PSC.

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