On 6 October your 0416 zone time DR position is LAT 25°16.0'N, LONG 130°25.0'E. At that time, you observe Mars bearing 083°psc. The chronometer reads 07h 16m 22s, and the chronometer error is 00m 10s fast. The variation is 1.5°E. What is the deviation of the standard compass?

Correct Answer: Option D — 1.2°W

Determine the True Bearing of Mars using the Nautical Almanac and Sight Reduction Tables for the given DR position and time. Applying the formula Compass Error = True - Compass, and subtracting the 1.5°E variation, yields a deviation of 1.2°W, aligning the magnetic compass with the calculated true bearing.