On 22 March your 0519 DR position is LAT 27°20.6'N, LONG 69°25.6'W. You observe an unidentified star bearing 051°T at an observed altitude (Ho) of 50°03.7'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe?

Correct Answer: Option B — Deneb

Determine GMT and extract GHA Aries and SHA from the Nautical Almanac. Calculate LHA and Declination. Comparing these values against the star list for 22 March confirms Deneb, as its celestial position aligns with the observed altitude and bearing relative to the DR position provided in the problem.