At 1622 ZT on 15 June, in DR position LAT 10° 15.2' N, LONG 135° 10' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon, bearing 101.2°psc. The variation is 5° E. What is the deviation?

Correct Answer: Option A — 1.5°E

Determining deviation via lunar amplitude involves computing the true rising or setting bearing using latitude and declination, then comparing it to the standard compass bearing adjusted for variation. This process yields a deviation of 1.5°E.