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).
Diesel-electric submarines can last 2-3 weeks under water before resurfacing. Diesel/battery submarines do not dive very deep. These are quick attack sub's and often carry cruise missiles that they launch from just below the surface. There is special machinery on board that recycles and purifies the air.