Question 416Navigation General70% to pass
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?
AI Explanation
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.
Related Questions
#414 The maximum distance at which a light may be seen under existing visibility conditions is called _______________.#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? #417 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? #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?