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- Q127 - Navigation Problems: Oceans
252. On 3 October your 2122 ZT position is LAT 26°32'N, LONG 84°26'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 106°pgc and 107°psc. The variation is 0°. What is the deviation for that heading?
The deviation is 0 because the gyro error derived from the Polaris bearing is offset by the difference between the gyro and compass headings, resulting in no compass deviation.
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