On 22 July your 0442 DR position is LAT 26°35.6' N, LONG 22°16.7' W. You observe an unidentified star bearing 104°T at an observed altitude (Ho) of 9°55.7'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?

Question

On 22 July your 0442 DR position is LAT 26&deg;35.6' N, LONG 22&deg;16.7' W. You observe an unidentified star bearing 104&deg;T at an observed altitude (Ho) of 9&deg;55.7'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?

Accepted Answer

Option A: Rigel. Convert chronometer time to GMT and determine the star's LHA. Using the DR position, calculate the Hc and Zn. The resulting values match the celestial coordinates for Rigel. This process follows standard Bowditch procedures for identifying an unknown celestial body from a single observation.

On 22 July your 0442 DR position is LAT 26&deg;35.6' N, LONG 22&deg;16.7' W. You observe an unidentified star bearing 104&deg;T at an observed altitude (Ho) of 9&deg;55.7'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?

On 22 July your 0442 DR position is LAT 26°35.6' N, LONG 22°16.7' W. You observe an unidentified star bearing 104°T at an observed altitude (Ho) of 9°55.7'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?