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- Q135 - Navigation Problems: Oceans
392. On 9 September your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of the observation the helmsman noted that he was heading 031°pgc and 040°psc. The variation is 11°W. What is the deviation for that heading?
The deviation is 2E. Polaris's true bearing matches the observed gyro bearing, indicating no gyro error. Total compass error is 9W, and given a variation of 11W, the deviation must be 2E to reconcile the difference.
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