Navigation Problems USCG Question #1183 (Set 35)

On 3 February your 0550 zone time DR position is LAT 26°16.0' N, LONG 112°05.0' W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Spica, Kochab, Rasalhague

Selecting stars for a fix requires a balanced azimuth spread to minimize the geometric dilution of precision. Spica, Kochab, and Rasalhague offer the most favorable distribution in azimuth and altitude for the given latitude and time, ensuring a reliable intersection of lines of position on the plotting sheet.

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