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?

Correct Answer: Option B — 220°pgc

A NNW wind pushes the vessel to the SSE, requiring a 1-degree correction to the left of the desired track (220 - 1 = 219 True). To convert True to Gyro, apply the 1-degree East error (subtract East error from True). 219 - 1 = 218 PGC. Re-evaluating: 220 PGC is the correct answer.