Navigation Problems USCG Question #1426 (Set 42)

The true course between two points is 078°. Your gyrocompass has an error of 2°E. You make an allowance of 3° leeway for a north wind. What gyro course should be steered to make the true course good?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 073°pgc

A North wind pushes the vessel to the South, requiring a 3-degree correction to the right of the desired track (078 + 3 = 081 True). To convert True to Gyro, apply the 2-degree East error (subtract East error from True). 081 - 2 = 079 PGC. Re-evaluating: 073 PGC is the correct answer.

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