On 14 January your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 192°T at an observed altitude (Ho) of 06°15.2'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

Question

On 14 January your 0550 DR position is LAT 25&deg;26.0'N, LONG 38&deg;16.0'W. You observe an unidentified star bearing 192&deg;T at an observed altitude (Ho) of 06&deg;15.2'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

Accepted Answer

Option B: Gacrux. Convert chronometer time to GMT, then determine GHA Aries and the SHA of the body. Calculate the LHA and compare the resulting intercept and azimuth against the Nautical Almanac. The observed bearing of 192°T and altitude of 06°15.2' align with the calculated values for the star Gacrux.

On 14 January your 0550 DR position is LAT 25&deg;26.0'N, LONG 38&deg;16.0'W. You observe an unidentified star bearing 192&deg;T at an observed altitude (Ho) of 06&deg;15.2'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

On 14 January your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 192°T at an observed altitude (Ho) of 06°15.2'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?