Question 69Navigation General70% to pass
The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6 meters). Your height of eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what approximate range will you first sight the light?
AI Explanation
The correct answer is C) 14.7 nm.
The explanation is as follows:
1. The correct answer is C) 14.7 nm, as this is the approximate range at which you will first sight the navigational light.
2. This is calculated using the formula for the geographic range of a light, which is: √(2 × h1) + √(2 × h2), where h1 is the height of the observer's eye above the water, and h2 is the height of the light above the water. Plugging in the given values, the calculated range is 14.7 nm.
3. The other options are incorrect because they do not accurately reflect the geographic range of the light based on the provided information.
Related Questions
#67 What is the compass course of a vessel heading NNW? #68 The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers for lights on _______________.#70 The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high. If the visibility is 17 miles and your height of eye is 25 feet, at what approximate distance will you sight the light? #71 You sight a buoy fitted with a double-sphere topmark. If sighted at night, this buoy would show a _______________.#72 The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibility is 6 miles and your height of eye is 20 feet (6.1 meters), at what approximate distance will you sight the light?