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

Question

On 20 July your vessel's 1626 zone time DR position is LAT 27&deg;13.0'N, LONG 63&deg;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&deg; Variation: 15&deg;W

Accepted Answer

Option A: 1.9&deg;W. Calculate the Sun's True Azimuth using the Nautical Almanac and Sight Reduction Tables. Compare the True Azimuth (Zn) to the Gyro Bearing. The difference is the Gyro Error. With a calculated Zn of 277.4° and a Gyro Bearing of 279.3°, the error is 1.9°W (Gyro Least, Error West).

On 20 July your vessel's 1626 zone time DR position is LAT 27&deg;13.0'N, LONG 63&deg;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&deg; Variation: 15&deg;W

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