![]() Which means if you need 20 liters of air at the surface, you require double that at ten meters (which is two atmospheres or two bar), which will double again at 30 meters (four bar).Īs you can’t feel this while breathing underwater, knowledge of your depth is quite important to keep control of your limited air reserves while diving.ģ. This amount is inversely proportional to the depth as is described in the first diving law, Boyle-Mariotte. Near the surface we use about 20 liters of air each minute by breathing in and out. The deeper you go, the bigger your air consumption. Rebreathers working with 100 percent oxygen can be safely used only in depths to ten meters (by today’s rules) or 20 meters (former military rules), so having a depth gauge to check depth is a good idea.Ģ. But he also lost a cameraman diving too deep using an oxygen rebreather. Hans Hass was the first scientist to use oxygen rebreathers for his studies of marine life, especially sharks, and later became the godfather of sport diving. They used oxygen rebreathers before the invention of the AquaLung. Until recently, oxygen toxicity was a neglected problem, only occurring when diving with pure oxygen like navy frogmen did. Oxygen is a strong poison, especially under pressure. Three reasons to know your depth in sports divingġ. And as I’m not known for keeping my stories short, let’s dive right in. This example is just to get an idea of how important depth is – especially for a diver. This is because Mauna Kea extends nearly 6,000 meters from the seafloor to the surface and another 4,207 meters above sea level. Mauna Kea, a dormant volcano in Hawaii, is the highest mountain on earth.
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