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 to the E by N, requiring a 4-degree correction to the left of the desired track (312 - 4 = 308 True). To convert True to Gyro, apply the 3-degree West error (add West error to True). 308 + 3 = 311 PGC. This follows standard navigation principles.