On 14 January your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 054°T at an observed altitude (Ho) of 07°52.1'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?

Correct Answer: Option A — Pollux

Convert chronometer time to GMT and determine the GHA of Aries. Calculate the LHA of the star using the DR longitude. By comparing the resulting declination and SHA against the Nautical Almanac for 14 January, Pollux is identified as the star matching the observed altitude and bearing.