On 11 November your 0200 zone time DR position is LAT 26°32' S, LONG 154°16' E. You are on course 058°T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?

Question

On 11 November your 0200 zone time DR position is LAT 26&deg;32' S, LONG 154&deg;16' E. You are on course 058&deg;T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?

Accepted Answer

Option A: Mars, Betelgeuse, Miaplacidus. Optimal star fixes require bodies spread roughly 120° apart in azimuth with altitudes between 15° and 70°. Mars, Betelgeuse, and Miaplacidus provide the best geometric distribution and magnitude for a reliable fix at the specified latitude and time, minimizing the potential for systematic errors in the celestial triangle.

On 11 November your 0200 zone time DR position is LAT 26&deg;32' S, LONG 154&deg;16' E. You are on course 058&deg;T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?

On 11 November your 0200 zone time DR position is LAT 26°32' S, LONG 154°16' E. You are on course 058°T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?