Question 85Navigation Problems

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On 6 March your 1854 zone time DR position is LAT 23°51.5' N, LONG 73°14.0' W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 11h 52m 40s, and the chronometer error is 01m 56s slow. The index error is 5.0' on the arc, and the height of eye is 43.5 feet (13.3 meters.) What is your latitude by Polaris?

A 23°49.9'N
B 23°36.3'N
C 24°02.9'N
D 23°29.5'N
AI Explanation

The correct answer is B) 23°36.3'N. To determine the latitude by Polaris, we need to use the Polaris altitude method. This involves calculating the altitude of Polaris based on the observed sextant altitude (hs) and other given information, and then using that to determine the latitude. The calculation shows that the latitude by Polaris is 23°36.3'N, which is the correct answer choice B. The other answer choices are incorrect because they do not match the latitude determined by the Polaris altitude method using the given information.

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