At 1620 ZT on 10 September, in DR position LAT 34° 03.8'N, LONG 050° 28.4'W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2° psc. The variation is 2°E. What is the deviation?

Question

At 1620 ZT on 10 September, in DR position LAT 34&deg; 03.8'N, LONG 050&deg; 28.4'W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2&deg; psc. The variation is 2&deg;E. What is the deviation?

Accepted Answer

Option C: 1.2&deg;E. Calculate true bearing using the amplitude formula for celestial bodies observed on the horizon. Factor in upper limb corrections, latitude, and declination, then reconcile the true azimuth against the standard compass bearing and variation to isolate deviation.

At 1620 ZT on 10 September, in DR position LAT 34&deg; 03.8'N, LONG 050&deg; 28.4'W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2&deg; psc. The variation is 2&deg;E. What is the deviation?

At 1620 ZT on 10 September, in DR position LAT 34° 03.8'N, LONG 050° 28.4'W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2° psc. The variation is 2°E. What is the deviation?