On 22 June your 0424 DR position is LAT 26°18.5' N, LONG 124°18.2' W. You observe an unidentified star bearing 154°T at an observed altitude (Ho) of 15°01.2'. The chronometer reads 12h 23m 24s, and is 01m 32s slow. What star did you observe?

Question

On 22 June your 0424 DR position is LAT 26&deg;18.5' N, LONG 124&deg;18.2' W. You observe an unidentified star bearing 154&deg;T at an observed altitude (Ho) of 15&deg;01.2'. The chronometer reads 12h 23m 24s, and is 01m 32s slow. What star did you observe?

Accepted Answer

Option A: Ankaa. Calculate GMT by applying chronometer error. Determine GHA Aries and SHA to find the star's LHA. Using the DR position, compute the altitude and azimuth. The intersection of the calculated LHA and declination with the observed altitude and bearing identifies the star as Ankaa, per the Nautical Almanac.

On 22 June your 0424 DR position is LAT 26&deg;18.5' N, LONG 124&deg;18.2' W. You observe an unidentified star bearing 154&deg;T at an observed altitude (Ho) of 15&deg;01.2'. The chronometer reads 12h 23m 24s, and is 01m 32s slow. What star did you observe?

On 22 June your 0424 DR position is LAT 26°18.5' N, LONG 124°18.2' W. You observe an unidentified star bearing 154°T at an observed altitude (Ho) of 15°01.2'. The chronometer reads 12h 23m 24s, and is 01m 32s slow. What star did you observe?