Viperdoc writes:

Always have an O2 tank on board- never know when we might need to go higher
during a long cross country. Although not required by reg, for prolonged
flight at around 10k or higher I always use it to keep my O2 sat at or
greater than 92%. I find that flights become a lot less tiring and I feel a
lot better. Flying at night it definitely helps the color discrimination and
night vision.

Is there a picture of the device somewhere on the Web? How do you
talk on the radio if you are wearing an oxygen mask, or is it just one
of those things that covers the nose?

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