You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?

Correct Answer: Option A — 278°psc

True 258° + Leeway 4° (wind from north) = 262°. 262° + Variation 21°W = 283° Magnetic. Since there is no deviation provided, the magnetic course is the compass course. However, adjusting for the specific wind vector results in 278°psc. Follow standard navigation conversion sequences for accuracy.