Question

The distance in nautical miles that you can see with a periscope is 1.17 times the square root of h, where h is the height of the periscope above the water, measured in feet. Can you see twice as far with a periscope that is 6 feet above the water than with a periscope that is three feet above the water? Explain.

Answer 1

So with the periscope raised to 4 feet above the surface, the horizon is 2 nm ... As I recall the rough thumb rule was that distance to the horizon in nautical miles is the square root of height of eye ... feet can be seen from the surface of the water at 10 miles, or by a periscope ... The closer you get, the more of the ship you see.

Explanation: