Submarines can move up and down underwater by changing their density. They take in water through special tanks to sink and use compressed air to rise. Small fins called hydroplanes and a tail rudder help steer and control direction. Moving water between tanks keeps the submarine balanced at different depths. In emergencies, compressed air can push out water quickly, making the vessel rise to the surface. These systems let submarines explore deep parts of the ocean and return safely.
Submarines can move up and down underwater by changing their density. They take in water through special tanks to sink and use compressed air to rise. Small fins called hydroplanes and a tail rudder help steer and control direction. Moving water between tanks keeps the submarine balanced at different depths. In emergencies, compressed air can push out water quickly, making the vessel rise to the surface. These systems let submarines explore deep parts of the ocean and return safely.