In rec.aviation.student Bob Noel wrote:
In article , Michael Ash
wrote:

At the risk of turning this thread into something useful, does anyone have
any recommendations as to when it's a good idea to give oxygen to
passengers? I'm not talking about the legal requirements, but just when
it's the smart thing to do. For example, as the pilot I like to start my
oxygen at about 10,000ft even though it's not required until quite a bit
higher. But then again, it doesn't really matter too much if my passengers
have mildly impaired judgement during the flight, even though I'd really
want to avoid that myself.

Those oximeter things are pretty inexpensive now. You could use one of those
to monitor your own status as well as your pax's need for supplemental oxygen.

A good point. I was actually looking at the prices the other day. It's
right on my threshold for buying one. The only reason I wouldn't is just
because I so rarely have the opportunity to get up to the altitudes where
it would be useful to have one. Maybe come winter when high-altitude
flying is possible (I'm a glider guy) I'll get one.

--
Mike Ash
Radio Free Earth
Broadcasting from our climate-controlled studios deep inside the Moon