On 22 May your 0437 DR position is LAT 25°18.5' N, LONG 51°18.0' W. You observe an unidentified star bearing 142°T at an observed altitude (Ho) of 23°10.2'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?

Correct Answer: Option D — Fomalhaut

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 Fomalhaut, matching the observed bearing of 142°T and altitude of 23°10.2'.