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- Q135 - Navigation Problems: Oceans
163. At 1620 ZT on 10 September, in DR position LAT 34° 03.8' N, LONG 050° 28.4' W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2° psc. The variation is 2° E. What is the deviation?
The deviation is 1.2E. The difference between the computed true amplitude and the observed compass amplitude, minus the variation of 2.0E, determines the deviation.
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