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- Q127 - Navigation Problems: Oceans
216. On 26 February your vessel's 1615 ZT DR position is LAT 25° 14' S, LONG 57° 22' W, when an azimuth of the Sun is observed. The chronometer time of the sight is 8h 13m 19s, and the Sun is bearing 266.0° per standard magnetic compass. The chronometer error is 01m 46s slow, and the variation in the area is 6° E. What is the deviation of the standard compass?
The deviation is calculated by subtracting the variation from the total compass error (true azimuth minus compass bearing). The total compass error is 7.7E, and the variation is 6E, resulting in a deviation of 1.7E.
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