On 17 March your 1845 DR position is LAT 25°10.0'N, LONG 66°48.0'W. You observe an unidentified star bearing 320°T at an observed altitude (Ho) of 50°02.9'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?

Question

On 17 March your 1845 DR position is LAT 25&deg;10.0'N, LONG 66&deg;48.0'W. You observe an unidentified star bearing 320&deg;T at an observed altitude (Ho) of 50&deg;02.9'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?

Accepted Answer

Option B: Mirfak. Convert chronometer time to UTC. Extract GHA Aries and SHA from the Nautical Almanac. Calculate the star's LHA and Declination. Matching these values to the observed bearing of 320°T and altitude of 50°02.9' identifies Mirfak, adhering to the rigorous sight reduction methods required for USCG deck officer examinations.

On 17 March your 1845 DR position is LAT 25&deg;10.0'N, LONG 66&deg;48.0'W. You observe an unidentified star bearing 320&deg;T at an observed altitude (Ho) of 50&deg;02.9'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?

On 17 March your 1845 DR position is LAT 25°10.0'N, LONG 66°48.0'W. You observe an unidentified star bearing 320°T at an observed altitude (Ho) of 50°02.9'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?