On 4 October your 1907 zone time DR position is LAT 25°15.0' S, LONG 105°44.0' E. At that time, you observe Deneb bearing 011.5°psc. The chronometer reads 00h 07m 42s, and the chronometer error is 00m 36s fast. The variation is 7.5°W. What is the deviation of the standard compass?

Correct Answer: Option A — 3.2°E

Calculating Greenwich Mean Time allows extraction of local hour angle and declination for Deneb from the Nautical Almanac. Solving the PZX triangle provides true bearing. Comparing true to compass bearing and applying local chart variation isolates the standard compass deviation as 3.2°E.