On 17 March your 1845 DR position is LAT 25°10.0'N, LONG 66°48.0'W. You observe an unidentified star bearing 077°T at an observed altitude (Ho) of 67°04.4'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?

Correct Answer: Option D — Pollux

Calculate the Greenwich Hour Angle (GHA) and Declination using the Nautical Almanac for the given GMT. Determine the Local Hour Angle (LHA) by applying longitude. Using the intercept method (Ho vs Hc) and azimuth, compare the calculated coordinates against the star list to identify Pollux as the celestial body.