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- Q158 - Navigation and Deck General/Safety
193. On 27 June your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass?
The deviation is 3.0W because the true azimuth is east of the compass bearing, resulting in a total compass error of 3.0E; subtracting the variation of 6.0E yields a deviation of 3.0W.
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