On 22 March your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 062°T at an observed altitude (Ho) of 23°22.0'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. Which star did you observe?

Correct Answer: Option D — Regulus

Convert chronometer time to GMT. Extract GHA Aries and SHA from the Nautical Almanac to compute LHA and Declination. Comparing these celestial coordinates against the star list for 22 March identifies Regulus, as its position aligns with the observed altitude and bearing from the DR position.