On 22 April your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 248°T at an observed altitude (Ho) of 25°00.9'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?

Correct Answer: Option C — Rigel

Convert chronometer time to GMT and determine GHA Aries. Calculate LHA for the DR position. Using the Sight Reduction Tables, compare the computed altitude and azimuth with the observed values. The parameters align with Rigel, matching the observed bearing of 248°T and altitude of 25°00.9'.