At 1435 ZT on 27 April, in DR position LAT 51° 56.8' N, LONG 150° 37.7' E, the Moon's upper limb is observed on the visible horizon, bearing 242.2° psc. Variation is 2° W. What is the deviation?

Correct Answer: Option A — 2.2°W

Moon upper limb amplitudes require altitude corrections. Determine true amplitude via standard navigational formulas, apply variation to find magnetic, and calculate compass deviation.