Question 72Navigation General

The correct answer is B) 10.0 miles. The formula to calculate the distance at which a light can be sighted is: Distance to Horizon (in nautical miles) = 1.17 x √(height of eye in feet) + 1.17 x √(height of light in feet) Plugging in the values given: Distance to Horizon = 1.17 x √(20 ft) + 1.17 x √(42 ft) = 5.2 miles + 4.8 miles = 10.0 miles The other options are incorrect because: A) 20.1 miles is too far, as the visibility is only 6 miles. C) 7.6 miles is too close, as the calculated distance is 10.0 miles. D) 6.0 miles is too close, as the calculated distance is 10.0 miles.