On 22 July your 1759 DR position is LAT 24°50.2' S, LONG 005°16.0' E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?

Correct Answer: Option A — Miaplacidus

Apply the sight reduction process by determining the star's GHA and Declination at the observed GMT. Using the DR position, calculate the Hc and Zn. The observed altitude of 28°12.2' and bearing of 203°T match the calculated values for Miaplacidus, confirming the star's identity per Nautical Almanac data.