On 22 July your 0442 DR position is LAT 26°35.6' N, LONG 22°16.7' W. You observe an unidentified star bearing 149°T at an observed altitude (Ho) of 12°55.0'. 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 149&deg;T at an observed altitude (Ho) of 12&deg;55.0'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?

Accepted Answer

Option B: Acamar. Calculate the GHA of Aries and the star's SHA to find the LHA. Using the observed altitude and the DR latitude, compute the intercept and azimuth. Comparing these values with the Nautical Almanac star data confirms the observed body is Acamar, matching the calculated celestial coordinates for the time.

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 149&deg;T at an observed altitude (Ho) of 12&deg;55.0'. 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 149°T at an observed altitude (Ho) of 12°55.0'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?