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 depth a sub can go is classified but it seems to be greater than 2,000 feet. All US subs are nuclear powered. This type of propulsion doesn't require air. Electrolysis creates air from sea water. The limiting factor for how long a sub can stay under water and away from port is the amount of food they can carry.