On 14 January your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 250°T at an observed altitude (Ho) of 31°01.2'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. Which 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 250&deg;T at an observed altitude (Ho) of 31&deg;01.2'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. Which star did you observe?

Accepted Answer

Option D: Fomalhaut. Calculate GHA Aries and LHA Aries from the chronometer time. Determine the star's LHA using the DR longitude. By entering Pub. 229 with the DR latitude and calculated LHA, the observed altitude and bearing match the coordinates for Fomalhaut, consistent with standard celestial navigation reduction procedures for unidentified stars.

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 250&deg;T at an observed altitude (Ho) of 31&deg;01.2'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. Which 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 250°T at an observed altitude (Ho) of 31°01.2'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. Which star did you observe?