At 2232 ZT on 14 July you are in DR position LAT 33°52' S, LONG 150°03' W, when you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 268.5°pgc. The variation is 15°E. What is the gyro error?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 1.0°E
Gyro error is the difference between true and gyro bearings. Compute the planet's true amplitude using the Nautical Almanac, then compare it directly against the observed gyro compass bearing.
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