Modern nuclear submarines make their own oxygen as needed by electrolyzing sea water.
The amount of oxygen carried by conventional submarines depends on the design and size of the particular submarine.
The submarine has scrubbers. They remove carbon dioxide from the air and break it down to release the oxygen back into the air. There are also a few tanks to supplement the oxygen content if necessary.
They use a 'gas exchange system' - usually chemicals that split the carbon dioxide molecules into atoms of oxygen and carbon. The oxygen is recycled back into the air in the submarine, and the carbon is retained for disposal.
Submarine grossed $4,581,937 worldwide.
about 15 kg
Submarine grossed $467,602 in the domestic market.
The same gas as the Air we breath. (Mostly Nitrogen, Oxygen and Argon)
14MILLION
yse
7,636 tons
This is not a "cut and dry" question. It depends on the pay grade and whether they are wearing their "dophins" or not. They cannot receive submarine pay until they finish the submarine qualifications and put on the submarine pin or "dolphins".
A submarine, theoretically, can go as long as the food for its sailors last. A submarine can make oxygen, distill water, remove CO2 and other pollutants, and provide almost anything needed to survive at sea and underwater for nearly an indefinite period of time. Modern nuclear-powered submarines' reactors will last without refueling for the life of the submarine - about 20 years. In 1960, the nuclear-powered submarine USS Triton circumnavigated the globe submerged.
12000