At 1444 ZT on 28 July, in DR position LAT 40° 56.8' N, LONG 167° 12.4' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 299.3° psc. The variation is 1° E. What is the deviation?

Correct Answer: Option B — 3.1°W

Moon amplitude calculation determines the true bearing of the celestial body at the visible horizon using latitude and corrected declination. Applying standard compass, variation, and computed true bearing relationships via TVMDC yields a compass deviation of 3.1°W.