Question 221Navigation General

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What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.6 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".

A 24.8 nm
B 17.8 nm
C 15.9 nm
D 10.3 nm
AI Explanation

The correct answer is B) 17.8 nm. The geographic range of a light depends on the height of the light above the water and the observer's height of eye. Using the formula provided in the "Reprints from the LIGHT LISTS AND COAST PILOTS," the geographic range for a height of eye of 37 feet (11.6 meters) and a lighthouse height of 37 feet (11.6 meters) is approximately 17.8 nautical miles. The other options are incorrect because they do not accurately reflect the formula and calculation for determining the geographic range of a light given the provided heights.

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