On 14 January your 1922 ZT DR position is LAT 27°18.5' S, LONG 67°18.0' E. You observe an unidentified star bearing 029°T, at an observed altitude (Ho) of 29°35.0'. The chronometer reads 03h 25m 43s and is 03m 15s fast. What star did you observe?

Question

On 14 January your 1922 ZT DR position is LAT 27&deg;18.5' S, LONG 67&deg;18.0' E. You observe an unidentified star bearing 029&deg;T, at an observed altitude (Ho) of 29&deg;35.0'. The chronometer reads 03h 25m 43s and is 03m 15s fast. What star did you observe?

Accepted Answer

Option B: Elnath. Determine the GHA of Aries and the star's Sidereal Hour Angle (SHA) to find the LHA. Using the DR latitude and the observed altitude (Ho), apply the intercept method (p = Ho - Hc). The resulting position line and azimuth align with Elnath’s coordinates as listed in the Nautical Almanac.

On 14 January your 1922 ZT DR position is LAT 27&deg;18.5' S, LONG 67&deg;18.0' E. You observe an unidentified star bearing 029&deg;T, at an observed altitude (Ho) of 29&deg;35.0'. The chronometer reads 03h 25m 43s and is 03m 15s fast. What star did you observe?

On 14 January your 1922 ZT DR position is LAT 27°18.5' S, LONG 67°18.0' E. You observe an unidentified star bearing 029°T, at an observed altitude (Ho) of 29°35.0'. The chronometer reads 03h 25m 43s and is 03m 15s fast. What star did you observe?