Navigation Problems USCG Question #145 (Set 4)

On 8 April your evening DR position is LAT 22°16.0' N, LONG 157°58.3' W. You observe an unidentified star bearing 271°T at an observed altitude (Ho) of 44°08.2'. The chronometer reads 05h 09m 57s, and is 01m 23s slow. What star did you observe?

Official USCG Answer & Rule Citation

Correct Answer: Option B — Aldebaran

Determine the star's identity by calculating the LHA of Aries at the time of observation. Using the DR position, compute the altitude and azimuth. The observed bearing of 271°T and altitude of 44°08.2' align with the celestial coordinates for Aldebaran, confirming the identification through standard sight reduction methods.

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