On 14 January your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 295°T at an observed altitude (Ho) of 13°50.7'. 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 295&deg;T at an observed altitude (Ho) of 13&deg;50.7'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?

Accepted Answer

Option D: Markab. Apply chronometer error to obtain UTC. Determine GHA Aries and SHA for the date. Calculate LHA Aries and add SHA to find GHA of the star. Using the DR position, solve for the star's calculated altitude and azimuth. Markab aligns with the observed data provided in the Nautical Almanac.

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 295&deg;T at an observed altitude (Ho) of 13&deg;50.7'. 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 295°T at an observed altitude (Ho) of 13°50.7'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?