On 17 May your 1554 zone time DR position is LAT 26°33.0'N, LONG 65°46.0'W. At that time, you observe the Sun bearing 269°psc. The chronometer reads 07h 55m 47s, and the chronometer error is 01m 14s fast. The variation is 3°W. What is the deviation of the standard magnetic compass?

Correct Answer: Option B — 7.6°E

Compass error is found by comparing True azimuth from celestial observation with standard compass bearing (psc). Applying Greenwich Mean Time from the chronometer and extracting GHA/Declination from the Nautical Almanac allows calculation of true bearing. The algebraic difference between true bearing and compass bearing yields compass error, which resolves to deviation when variation is applied.