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- Q134 - Navigation Problems: Near Coastal
473. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 210°.
The deviation is 0.0 because correcting the gyro heading for its error and applying the variation results in a magnetic heading that matches the compass reading of 210.
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