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Scuba diving Life is diving everything else is just surface interval poster

In the 1600s, a diving bell would be lowered that had trapped air in it. A diving bell is like a large heavy upside-down bucket that holds air inside when lowered into the water. Scuba diving Life is diving everything else is just surface interval poster A diver would breathe that air and swim in an and out of the bell to work until the air became bad. Later fresh air was pumped to the diving bell through a hose, so the diver could stay longer. The first diving suits used a heavy copper diving helmet with windows and a hose from an air pump. The helmet was clamped to a waterptoof diving suit.

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Divers would wear heavy weghts and walk on the seafloor as it was not safe to swim. The air hose would send air to the helmet from a pump on land or on a boat above the diver. The air would pass trough the helmet and out into the water through a valve, and the diver would breathe from the air in the helmet. This wasted a lot of air, but there was no way to only supply air when the diver needed it. This is called a free-flow system.

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