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 Test and Crush depth of any modern U.S. Navy Submarine is Classified Secret/NOFORN and cannot be disclosed publicly. Published public sources are merely estimates only; I can say that it varies with the type of submarine class, and that the official U.S. Navy statement on any submarine depth capability is that they can exceed 400 feet. But you probably already know that.