You are steering 142°pgc to make good your desired course. The gyro error is 1°E . The variation is 8°W. What should you steer by standard magnetic compass to make good the desired course?

Correct Answer: Option D — 151°psc

Convert gyro course (142°pgc) using gyro error (1°E) to true course (143°T). Apply westerly variation (8°W) to find magnetic course (151°m). With zero deviation implied or factored, the standard magnetic compass steering heading is 151°psc.