Question 417Navigation General70% to pass
The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
AI Explanation
The correct answer is C) 13.7 miles.
The reasoning is based on the formula for the geographic range of a light, which is: Geographic Range (in nautical miles) = 2.08 x (√height of eye (in feet) + √height of light (in feet)).
Using the given information - a nominal range of 20 miles, a light height of 52 feet, a visibility of 12.0 miles, and a height of eye of 20 feet - plugging these values into the formula yields a geographic range of approximately 13.7 nautical miles, which is the correct answer.
The other options are incorrect because they do not accurately reflect the calculated geographic range based on the provided information.
Related Questions
#415 The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light? #416 The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light? #418 The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light? #419 The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 14 miles and your height of eye is 20 feet, at which approximate distance will you sight the light? #420 The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?