The true course between two points is 057°. Your gyrocompass has an error of 3° east and you make an allowance of 1° leeway for a north-northwest wind. Which gyro course should be steered to make the true course good?

Correct Answer: Option A — 053°pgc

To find the gyro course, apply the leeway correction to the true course first. A north-northwest wind pushes the vessel to the east, so subtract 1° from the true course (057° - 1° = 056°T). Applying the 3° East gyro error (subtracting error) results in 053°pgc.