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Submarine construction is much like a thermos bottle. What you see on the outside is the outer hull, or superstructure. The inner pressure hull is more spherical in shape and can withstand higher pressures.
All hatches, be it entry hatches, trash tube, torpedo tube, missile tubes, etc., have primary and secondary access. All hatches also have an inner O-ring seal to further maintain watertight integrity. A major safety feature is that no 2 hatches / doors can be open at the same time.
For certain valves, called "Hull Valves" (those exposed to direct sea pressure) they are constructed and maintained under a program called "Subsafe", at least here in the U.S. This program was a direct result of the loss of the USS Thresher (SSN-593), which had a major hull valve rupture and sank during sea trials. Since the implementation of the Subsafe program, there hasn't been an accident like it in the U.S. inventory.
Essentially, hull valves go through a very strict welding and inpection process to ensure that any possible failure is minimized to the fullest extent.
All valves and hatches exposed to direct sea pressure are also monitored for any water leakage on a regular basis, as are the bilge levels. Any increase can mean a seawater breach. A small breach at extreme depth can be catastrophic, as the sea pressure on the hull is enourmous.
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Why are submarines cabins pressurized?
To keep water from leaking in.
Why are submarines strong?
because they have to withstand the pressure of the water when they go down under water. and to keep the people safe :)
Where do submarines go?
in the water
How is a pink dolphin like submarines?
Pink dolphins are like submarines because they never go in the water, dolphins and submarines alike are have waterphobia and never go in the water. Pink dolphines also are lesbians like submarines
Why cannot submarines go in deepest parts in oceans?
As submarines go deeper they are surrounded by more and more pressure from the water arround them. There are not currently any submarines that can withstand that amount of water pressure.
How do submarines go forward?
Most submarines have propellers that spin, pushing them forward. A few smaller research submarines use a water jet for propulsion.
Why does submarines have to go under water?
Submarines are built with a special design that allows them to be faster underwater. Submarines can be used during a war as a way to sneak up to enemy lines in the water, but still stay hidden.
Why do submarines have to be strong?
Submarines would need thick, strong walls because They would have to withstand the pressure of the water that would increase the deeper they go, to do this they would need stronger and thicker materials to cope with the force (This would help keep the people safe).
What do both submarines and dolphins bothuse in water?
Sonar
Do submarines explore the atmosphere?
No submarines do not explore the atmosphere. atmosphere means air. Sub means under, Marine means water.
Where does the US keep their nukes?
In almost every state in the country, in submarines, etc.
How do submarines communicate in water?
military submarines use low frequency antenna that extends from the sail(conning tower.) The message is typed into a computer, then is sent to another submarines antenna that receives it and displays it on a computer.
