Question 100Navigation Problems
70% to passOn 23 March your 1600 ZT DR position is LAT 27°16.3' N, LONG 156°48.2' W. You are on course 063°T at a speed of 18.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
A
Hamal, Rigel, Alphard
B
Arcturus, Regulus, Sirius
C
Betelgeuse, Dubhe, Regulus
D
Procyon, Sirius, Capella
AI Explanation
The correct answer is A) Hamal, Rigel, Alphard. The key factors in determining the best stars for a fix at the given position and time are the stars' azimuth, altitude, and magnitude. Hamal, Rigel, and Alphard are well-suited because they have high altitudes, favorable azimuths relative to the vessel's course, and bright magnitudes that make them easily observable. The other answer choices do not provide an optimal combination of these factors. For example, Arcturus, Regulus, and Sirius (choice B) may not be as well-positioned in the sky or as bright as the stars in the correct answer.
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