I will just add that many years ago, a commercial airline pilot friend
was talking with some other similarly high time pilots about flying
recreationally. he mentioned how much better your night vision gets
the instant you take the first breath of oxygen. everyone seemed to
concur. that stuck with me.

On Thu, Jul 5, 2018 at 1:19 PM Mike Stirewalt via KRnet
<krnet@list.krnet.org> wrote:
> Zipper said,
> > "Oxygen is REQUIRED at 14k cabin altitude for pilots. It is recommended
> well below that, and for good reason . . . "
age to krnet-le...@list.krnet.org

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