Question 416Navigation General

The correct answer is D) 12.8 miles. The explanation is as follows: 1) The correct answer is D) 12.8 miles. This is calculated using the formula for the geographic range of a light, which is: Distance (in nautical miles) = 2.2 x square root of the height of the light (in feet) + 2.2 x square root of the height of eye (in feet). 2) Plugging in the given values, the calculation is: 2.2 x square root of 42 + 2.2 x square root of 20 = 12.8 miles. 3) The other options are incorrect because they do not accurately apply the formula for calculating the geographic range of a light based on the provided information.