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- Q135 - Navigation Problems: Oceans
211. On 20 July your vessel's 1626 zone time DR position is LAT 27°13.0'N, LONG 63°42.0'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information. Chronometer time: 08h 24m 18s Chronometer error: slow 02m 12s Gyro bearing: 279.3° Variation: 15°W
The gyro error is 1.9 West because the computed true azimuth of the Sun (281.2) differs from the observed gyro bearing (279.3) by 1.9, and the true bearing is greater than the gyro bearing, indicating a West error.
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