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- Q142 - Navigation Problems: Oceans
225. On 28 November your vessel's 0712 zone time DR position is LAT 26° 54' S, LONG 45° 18' W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information.
Chronometer time: 10h 09m 18s
Chronometer error: slow 02m 54s
Gyro bearing: 102°
The gyro error is determined by comparing the observed gyro bearing with the calculated true azimuth of the Sun. A difference of 0.6 indicates the gyro compass is reading 0.6 higher than true, resulting in a 0.6 West gyro error.
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