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- Apprentice Mate Steersman (Oceans or Near Coastal (Any Appropriate Tonnage)) »
- Q414 - Navigation Problems: Chart Plot
57. As you cross the New Haven Outer Channel range, you observe the range in line bearing 335.5° per gyrocompass. The helmsman reports that he was heading 100° per gyrocompass, and that the standard magnetic compass read 109° at the time of the observation. What are the gyro error and deviation of the standard magnetic compass on this heading?
The gyro error is calculated as the difference between the true bearing of the range and the observed gyro bearing, resulting in 2W. The deviation of the standard magnetic compass is determined by comparing the magnetic heading to the compass reading, yielding 3E.
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