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- Q135 - Navigation Problems: Oceans
169. On 17 April your vessel's position is LAT 21° 00' S, LONG 78° 30' W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 082.7° per standard magnetic compass. Variation in the area is 2.0° W. The chronometer reads 10h 59m 24s and is 01m 24s fast. What is the deviation of the compass?
The observed compass bearing of the rising Sun (082.7) compared to the computed true bearing (079) and the known variation (2.0 W) indicates a westerly deviation of approximately 2.0.
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