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 American nuclear seawolf class submarines can dive to about 2400 feet (730 m). Although the truth is likely to be deeper as the full knowledge of submarine depth is kept secret in a lot of case's. It is said that most nuclear submarines can stay under water for a year but i am not sure if this has been tested.