Make Your Stomach Ache Go Away. Stomach aches, otherwise known as abdominal pain, are one of the most annoying maladies that can affect almost anyone at anytime in their lives. There are endless causes for stomach aches and the most frequent causes will be discussed here.
2)HULL CAPACITY. Hulls are special structures in a submarine to hold water in them which help the submarine to maintain buoyancy underwater. The deepest a submarine can go is about 3 km underwater(I dunno if modern technology has surpassed that level or whatever).
The first submarine was developed by Cornelis Drebbel, a Dutchman, in 1620. The first submarine that went into action was the Turtle, developed by David Bushnell in 1776. It went in action, but never sank a ship. The first submarine to do that was the Hunley in 1864. (With the loss of the submarine, and its entire crew). The first modern submarine that went into service was the Holland, invented by John Holland in 1903.