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Tag Archive: density


Scuba Q and A: Why Do Deep Divers Use Helium?

Filed Under: Scuba Diving Q and A by
August 7, 2019
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Scuba Q and A: Why Do Deep Divers Use Helium? Q. Why is helium preferred over nitrogen for diluting oxygen during deep sea diving? Answer: There are three reasons why helium becomes a necessary addition to breathing gas as depth increases: Oxygen Toxicity Oxygen is known to cause central nervous system (CNS) toxicity at higher […]

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Scuba Q and A: How Deep Can You Dive Using Air?

Filed Under: Scuba Diving Q and A by
August 7, 2019
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Scuba Q and A: How Deep Can You Dive Using Air? Q. How deep can someone scuba dive using normal air? Answer:  There are a number of factors that determine the Maximum Operating Depth (MOD) of any gas mixture. These include: Inert-Gas Narcosis Inert gas narcosis using air begins to become debilitating through anaesthetic effect […]

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