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 C — Aldebaran
Utilize the Nautical Almanac to find the GHA and Declination for the corrected time. Applying the intercept method with the DR position, the calculated altitude and azimuth for Aldebaran match the observed data, confirming the star's identity through standard celestial navigation reduction procedures.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.