Navigation Problems USCG Question #95 (Set 3)

On 28 October morning twilight will occur around 0524 ZT. Your DR position is LAT 25°25.0' N, LONG 32°33.3' W. Considering their magnitude and location, which group will be the three stars best suited to observe for a star fix at star time?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Sirius, Capella, Denebola

Selecting stars for a fix requires balancing azimuth spread and altitude. Sirius, Capella, and Denebola offer excellent separation in the morning sky at this latitude. According to Bowditch, stars with magnitudes less than 2.0 are preferred for visibility during twilight, ensuring clear observations for an accurate celestial fix.

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