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- Q135 - Navigation Problems: Oceans
139. At 1523 ZT on 14 June, in DR position LAT 31° 58' S, LONG 48° 42' W you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 118.0° psc. The variation is 10° W. What is the deviation?
The deviation is 2.1 W. The true bearing of the Moon, calculated from its amplitude, is approximately 106T. Comparing this to the observed compass bearing of 118.0 and the variation of 10 W, yields a west deviation of 2.1.
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