What's minimum safe O2 level?

Cub Driver wrote in message . ..
In contrast, I'm not so comfortable with "deep breathing" to maintain a
higher oxygen saturation. In accomplishing this, you are almost
certainly decreasing the carbon dioxide in your blood, and that can make
you dizzy, lightheaded, anxious, and/or confused.

Thanks. That's a good description of what happens to tourist skiers
when they begin to hyperventilate at high altitudes.

(It was my impression though that they got there by panting rather
than by taking deep, measured breaths.)

I am off to Aspen next month. I'm going to try to forget this thread.
It's not good to be self-concious about one's breathing!


One of my instructors was of the opinion (and I susbscribe to it) that
as PIC oxygen at night above 10,000 feet and 12,000 during the day. No
exceptions.