What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".

Correct Answer: Option D — 18.3 nm

Geographic range is calculated by adding the distance to the horizon for the light's height and the observer's height of eye. Using the Light List data for Fenwick Island and the formula 1.17 times the square root of height in feet, the combined distance equals approximately 18.3 nautical miles.