59. What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to «Reprints from the LIGHT LISTS AND COAST PILOTS». (use charted range of 20 miles as nominal range)

The geographic range of a light is determined by adding the horizon distances for the observer and the light, limited by the nominal range. Using the provided formula and heights of eye (62 ft) and light (65 ft), the geographic range is calculated to be approximately 18.6 nautical miles, which is less than the nominal range of 20 nautical miles; therefore, the visible range is 18.6 nm.