Question 119Navigation Problems

70% to pass

On 28 February your 1850 zone time DR position is LAT 27°49.0' N, LONG 159°24.0' W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?

A Hamal, Alkaid, Canopus
B Bellatrix, Vega, Regulus
C Sirius, Mirfak, Elnath
D Rigel, Schedar, Regulus
AI Explanation

The correct answer is D) Rigel, Schedar, Regulus. The key factors in determining the best stars for a celestial fix are their magnitude, azimuth, and altitude. Rigel, Schedar, and Regulus are well-suited because they have a good spread in azimuth and altitude, allowing for an accurate intersection of lines of position. Additionally, these stars are of a relatively bright magnitude, making them easier to observe and identify. The other answer choices do not provide as optimal a combination of these celestial navigation factors.

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