On 17 April your 1610 ZT DR position is LAT 22°07.0'N, LONG 158°16.0'W. At that time, you observe the Sun bearing 271°psc. The chronometer reads 03h 08m 52s, and the chronometer error is 01m 16s slow. The variation is 4°E. What is the deviation of the standard magnetic compass?

Correct Answer: Option D — 2.3°W

Determine GMT from the chronometer reading and error, then enter the Nautical Almanac and Pub. No. 229/249 to find the Sun's true bearing. Compare the calculated true bearing with the standard compass bearing (psc) to find total compass error, and apply easterly variation to solve for the 2.3°W deviation.