Yes, they does.
They rise to the surface when air is pumped IN. They sink when air is let out
They use ballast tanks to contain sea water or air to control their depth
Submarines change their depth by use of ballast tanks. To dive, they open their tanks so that they become filled with water. They also angle their dive planes. To surface, they pump the water out of their tanks and fill them with pressurised air.
Submariners.
submarines are important because people need to go under the sea and do what they got to do to save the world
Submarines are designed with enough ballast and control systems to allow them to submerge and surface as needed.Surface ships are designed only with enough ballast and control systems to keep them on the surface. While they can sink just as well as submarines can, their ability to re-surface without a salvage operation is non-existent.
Submariners.
Yes, they had crews.
170
In World War 2 submarines people had many jobs. Some listened to different radio signals, and others watched the sonar. There were also navigators, torpedo loaders and shooters, and preachers. In most submarines there were surgeons.
no they dont float like normal people