The true course between two points is 220°. Your gyrocompass has an error of 1°E. You make an allowance of 1° leeway for a north-northwest wind. What gyro course should be steered to make the true course good?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 220°pgc
A NNW wind pushes the vessel toward the SSE. To maintain 220°T, steer 1° to the right (221°T). With 1°E gyro error, the gyro course is 221°T minus 1°E error, resulting in 220°pgc. Leeway correction is applied to the desired track before gyro error.
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