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?

Correct Answer: Option C — Rigel

Calculate the star's GHA and Declination for the corrected GMT. Using the DR position, determine the Hc and Zn. The observed altitude of 9°55.7' and bearing of 104°T align with the calculated values for Rigel, confirming the star's identity through standard celestial navigation reduction methods found in Bowditch.