Question 10Navigation Problems

70% to pass

At 0600 ZT on 24 July your DR position is LAT 22°37'N, LONG 32°45'W. You are steering 185°T at a speed of 20.0 knots. Determine the computed altitude (Hc) and azimuth (Zn) for an observation of the Sun's lower limb taken at 1030 ZT. At this time the chronometer reads 00h 30m 16s and is 0m 31s slow.

A Hc 64°44.2' Zn 094.7°
B Hc 64°41.7' Zn 087.8°
C Hc 64°30.8' Zn 090.1°
D Hc 64°27.5' Zn 092.3°
AI Explanation

The correct answer is B) Hc 64°41.7' Zn 087.8°. Here's the explanation: 1. The correct answer is B, as it provides the computed altitude (Hc) and azimuth (Zn) for the observation of the Sun's lower limb taken at 1030 ZT. 2. To arrive at the correct answer, the calculation must take into account the given information, including the DR position, course, speed, and the chronometer error. Using established celestial navigation principles and formulas, the correct Hc and Zn values can be determined. 3. The other options are incorrect because they do not match the precise Hc and Zn values calculated using the provided data and proper celestial navigation techniques. 4. Overall, the correct answer B demonstrates the proper application of celestial navigation principles to solve this problem accurately.

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