On 23 September while taking stars for an evening fix, an unidentified star is observed bearing 261°T at an observed altitude of 61°35'. Your 1836 zone time DR position is LAT 25°18'S, LONG 162°36'E. The chronometer reads 07h 34m 12s, and the chronometer error is 01m 54s slow. Your vessel is steaming on a course of 230°T at a speed of 18 knots. What star did you observe?

Question

On 23 September while taking stars for an evening fix, an unidentified star is observed bearing 261&deg;T at an observed altitude of 61&deg;35'. Your 1836 zone time DR position is LAT 25&deg;18'S, LONG 162&deg;36'E. The chronometer reads 07h 34m 12s, and the chronometer error is 01m 54s slow. Your vessel is steaming on a course of 230&deg;T at a speed of 18 knots. What star did you observe?

Accepted Answer

Option D: Antares. To identify the star, calculate the LHA of the body using the observed altitude and the DR position. By comparing the calculated declination and LHA to the Nautical Almanac, the body is identified as Antares. This process validates the celestial observation against the vessel's known DR position.