Question 81Navigation Problems

The correct answer is D) Acrux, Procyon, Arcturus. This is the correct answer because these three stars are well-suited for a celestial fix at the given latitude, longitude, and course. Acrux and Canopus are prominent southern stars that would be visible at the low southern latitude, while Procyon and Arcturus are bright northern stars that would also be observable. The combination of a southern star, a northern star, and a star near the eastern horizon (Arcturus) provides the best geometry for an accurate celestial fix. The other answer choices are incorrect because they do not provide an optimal combination of star positions and magnitudes for the given location and course. For example, Sirius and Regulus are not as well-positioned for a fix in the southern hemisphere.