On 3 December evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position will be LAT 24°18.5' S, LONG 110°30.6' W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?

Question

On 3 December evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position will be LAT 24&deg;18.5' S, LONG 110&deg;30.6' W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?

Accepted Answer

Option C: Alpheratz, Achernar, Nunki. Optimal star selection for a fix requires bodies distributed around the horizon to maximize the angle of cut. Alpheratz, Achernar, and Nunki are selected based on their high magnitude and favorable azimuth distribution at the specified latitude and twilight time, adhering to standard celestial navigation principles for accuracy.

On 3 December evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position will be LAT 24&deg;18.5' S, LONG 110&deg;30.6' W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?

On 3 December evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position will be LAT 24°18.5' S, LONG 110°30.6' W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?