On 14 January your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 054°T at an observed altitude (Ho) of 07°52.1'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?

Question

On 14 January your 1922 DR position is LAT 27&deg;18.5'S, LONG 67&deg;18.0'E. You observe an unidentified star bearing 054&deg;T at an observed altitude (Ho) of 07&deg;52.1'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?

Accepted Answer

Option D: Pollux. Convert the chronometer time to GMT, then determine the GHA of Aries and the SHA of the body. Calculate the LHA using the DR longitude. By comparing the resulting declination and azimuth with the Nautical Almanac data, Pollux is identified as the body that matches the observed altitude and bearing.

On 14 January your 1922 DR position is LAT 27&deg;18.5'S, LONG 67&deg;18.0'E. You observe an unidentified star bearing 054&deg;T at an observed altitude (Ho) of 07&deg;52.1'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?

On 14 January your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 054°T at an observed altitude (Ho) of 07°52.1'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?