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).
There are 3 main types of submarines. Pleasure Submarine: Pleasure submarines are generally very small and expensive, used by the rich people to admire marine life. Scientific submarines: Scientific submarines are used to investigate the bottom of oceans or lakes and bring back biological samples or relic.