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How Does A Submarine Work? - Blue PLanet II - Earth Lab

Discussion in 'Design and technology' started by AndrewvanZyl, Nov 3, 2017.

  1. AndrewvanZyl

    AndrewvanZyl Established commenter

    Greg Foot steps aboard the Alucia vessel to check out the submarine (technically a submersible) used by the Blue Planet II team to film at depths down to 1000m. Greg talks to pilot team leader Mark "Buck' Taylor and finds out how such a delicate submersible is launched, protects its occupants and manoeuvres at such extreme depths.

  2. stevesmiths0409

    stevesmiths0409 New commenter

    Here is the explanation

    Same Like other ships, a submarine can float because the weight of the water that it displaces is equal to the weight of the ship, which means the pressure of the submarine pressing down on the water is same as the pressure of the water pushing up on the ship,this process is called buoyant force. Buoyant force works the same way on a submarine.
    even though submarine's are different from other ships, because it can control its buoyancy. This means the submarine captain can decide when to sink down into the ocean or come back up to the surface
    To control buoyancy, the submarine relies on special tanks that can be filled with water or air, To return to the surface, the tanks are filled with air, this makes the submarine less dense than the water around it, causing the submarine to float on the surface.
    When the captain decides it's time to take a dive, the air is released through a vent, and the tanks are flooded with water. this makes the submarine denser than the surrounding water, which causes it to sink, supply of air is kept on board to fill and refill the tanks, In emergency, the tanks can be filled with high-pressure air to return the crew and the vessel to the surface very quickly.

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