The true course between two points is 312°. Your gyrocompass has an error of 3°W. You make an allowance of 4° leeway for a west by south wind. What gyro course should be steered to make the true course good?

Correct Answer: Option A — 311°pgc

A W by S wind pushes the vessel toward the E by N. To maintain 312°T, steer 4° to the left (308°T). With 3°W gyro error, the gyro course is 308°T plus 3°W error, resulting in 311°pgc. Always verify the direction of leeway drift relative to the course.