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- Q127 - Navigation Problems: Oceans
269. On 5 August your 0310 ZT position is LAT 09° 02' N, LONG 21° 08' W. You observe Polaris bearing 002° pgc. At the time of the observation the helmsman noted that he was heading 316° pgc and 329° psc. The variation is 15° W. What is the deviation for that heading?
The deviation on a heading of 329 psc is 0.5 East, determined by calculating gyro error using Polaris observations and applying the TVMDC relationships to convert gyro heading to compass heading, accounting for variation.
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