On 23 September your 1836 DR position is LAT 25°18'S, LONG 162°36'E. You observe an unidentified star bearing 148°T at an observed altitude (Ho) of 13°32'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. Which star did you observe?

Correct Answer: Option B — Achernar

Calculate Greenwich Hour Angle (GHA) Aries and Sidereal Hour Angle (SHA) using the Nautical Almanac for the given GMT. Determine Local Hour Angle (LHA) by applying longitude. Compare the calculated LHA and Declination against the observed bearing and altitude to identify the star as Achernar, matching the celestial coordinates.