Question 95Navigation Problems

70% to pass

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?

A Sirius, Hamal, Denebola
B Sirius, Mirfak, Hamal
C Sirius, Capella, Denebola
D Sirius, Denebola, Dubhe
AI Explanation

The correct answer is C) Sirius, Capella, Denebola. This is the correct answer because these three stars are best suited for a star fix at the given time and location. Sirius is a very bright star that will be visible in the southern part of the sky. Capella is a bright star in the northern part of the sky, and Denebola is a moderately bright star in the eastern part of the sky. Together, these three stars provide a good geometric spread to obtain an accurate star fix. The other options are incorrect because they do not provide as favorable a geometric spread for the star fix. Hamal and Dubhe are not as well-positioned as Capella and Denebola, and Mirfak is not as bright as Capella.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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