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Why Do Pilots Wear Oxygen Masks When They Fly At Very High Altitudes?

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    Above 12,500 feet over 30 min. The FAA requires Oxygen for the air gets thinner above there!
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    Logic101  

    answered 2 years ago

      They want to be alive when they again make contact with Terra Firma!
      Without sufficient percentage of oxygen being available in the breathing atmosphere that they would be operating in, 21.8 ppm is normal at the surface of earth, their brain would close down to 'entrap' oxygen in the brain's arteries, otherwise they go unconscious, followed by a crash landing on return to the earth's surface!
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      Dtagliento  

      answered 2 years ago

        DUH! No oxygen at high atmospheres! :@
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        Freegirl  

        answered 2 years ago

        At high altitude there is less oxygen so they  wear oxygen masks while flying at very high altitude.
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        Omdijpal  

        answered 6 months ago

        Because the oxygen smells nice, and the air at very high altitude smells very bad.
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        Guest

        Guest  

        answered 2 months ago

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