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- Q135 - Navigation Problems: Oceans
180. On 17 May your 1554 zone time DR position is LAT 26° 33.0' N, LONG 65° 46.0' W. At that time, you observe the Sun bearing 269° psc. The chronometer reads 07h 55m 47s, and the chronometer error is 01m 14s fast. The variation is 3° W. What is the deviation of the standard magnetic compass?
The deviation is 7.6 E. The true azimuth (264.4 T) corrected for variation (3 W) yields a magnetic bearing (261.4 M). The observed compass bearing (269 psc) is then 7.6 greater, indicating an east deviation.
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