On 21 April your 1542 zone time DR position is LAT 28°54.0'S, LONG 19°07.0'W. At that time, you observe the Sun bearing 299°psc. The chronometer reads 04h 44m 11s, and the chronometer error is 01m 54s fast. The variation is 3°E. What is the deviation of the standard compass?

Correct Answer: Option B — 0.3°W

Compute Greenwich Mean Time from chronometer time and error, then use the Nautical Almanac to find the Sun's geographical position. Calculate True Bearing via standard amplitude or azimuth formulas. Compare True Bearing against the standard compass bearing (psc) to determine total compass error, and apply variation to isolate deviation.