Azimuth Sun Only
On 31 May 1981, your vessel's 1420 zone time DR position is Lat. 29° 06.0' N, Long. 120° 06.0' W, when an azimuth of the Sun is observed. The bearing of the Sun per standard magnetic compass was 255.3°. The chronometer time of the observation is 10h 17m 24s. The chronometer error is 02m 32s slow. The variation for this area is 12.9° E. What is the deviation of the standard magnetic compass?
A. 2.5° W
B. 2.9° W
C. 2.9° E
D. 3.2° E
On 7 December 1981, your vessel's 0835 zone time DR position is Lat. 28° 30.0' N, Long. 125° 39.3' W, when an azimuth of the Sun is observed. The chronometer time of the sight is 04h 34m 48s, and Sun is bearing 113° per standard compass. The chronometer error 01 m 24s slow, and the variation in the area is 13.0 E. What is the deviation of the standard compass?
A. 0.5° E
B. 1.0° W
C. 2.5° E
D. 3.0° W
Azimuth Stars Only
On 16 June 1981, your 0430 zone time DR position is Lat. 29° 24.0' S, Long. 36° 16.0' E. At that time, you observe Vega bearing 341.0° psc. The chronometer reads 02h 32m 06s, and the chronometer error is 01 m 54s fast. The variation is 20.5° W. What is the deviation?
A. 3.2° E
B. 3.2° W
C. 2.4° W
D. 2.8° E
On 15 October 1981, your 0325 zone time DR position is Lat. 26° 51.0' N, Long. 138° 17.0' W. At that time, you observe Canopus bearing 167° pgc. The chronometer reads 00h 25m 36s, and the chronometer error is 00m 20s slow. The variation is 2° E. What is the gyro error?
A. 1.3° W
B. 3.2° W
C. 3.2° E
D. 4.1° W
Azimuth Planets Only
On 6 October 1981, your0416 zone time DR position is Lat. 25° 16.0' N, Long. 130° 25.0' E At that time, you observe Mars bearing 083° psc. The chronometer reads 07h 16m 22s, and the chronometer error is 00m 10s fast. The variation is 1.5° E. What is the deviation of the standard compass?
A. 0.4° E
B. 1.2° W
C. 3.5° E
D. 19.0 E
At 2326 ZT, on 22 June 1981, your vessel's position IS Lat. 28° 30.0' N, LONG 150° 04.0' W. An azimuth of the planet Jupiter is observed, and the standard compass bearing is 250.4° psc. The chronometer reads 09h 24m 36s and is 01m 12s slow. The variation of this area is 13.5° E. What is the deviation of the standard compass?
A. 3.0° W
B. 3.5° W
C. 1.5° E
D. 2.3° E
