Question 194Navigation General

The correct answer is B) 9.5 miles. The explanation is as follows: 1. The formula to calculate the range of visibility for a navigational light is: Square root of (2 x height of light above water in feet + 2 x height of eye above water in feet). In this case, the height of the light is 40 feet and the height of eye is 25 feet, so the calculated range is 9.5 miles, which corresponds to option B. 2. This formula is based on the standard practice and regulations for determining the visibility of navigational lights, as outlined in publications such as the Light List and Navigation Rules. 3. The other options are incorrect because they do not match the calculated range of 9.5 miles. Option A (6.2 miles) is too short, option C (12.9 miles) is too long, and option D (14.2 miles) is also too long.