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- Q135 - Navigation Problems: Oceans
262. On 23 June in DR position LAT 21°39.0'S, LONG 106°28.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 078°psc. The chronometer reads 02h 14m 39s and is 01m 43s slow. Variation in the area is 9°W. What is the deviation of the standard magnetic compass?
Calculate the Sun's true azimuth using latitude and declination, compare it to the observed compass bearing to determine total compass error, and then subtract the variation to find the compass deviation.
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