On Nov 14, 2:33 pm, Stefan wrote:
Robert M. Gary schrieb:

Do Scuba guys use O2? I thought they used air?

Of course they don't breath pure O2. However, some "advanced" divers
sometimes don't just use compressed air, but their own mixture. Even
more advanced divers sometimes use apparati which mix pure O2 with
whatever they want on the fly while under water.

So a specialized scuba shop might be able to provide you with pure O2.

I happened to visit a SCUBA shop the other day, and can confirm that
they do have bottles of oxygen and compressed air - and the facilities
for mixing them as desired. See the comment on Nitrox elsewhere in the
thread. Since the O2 is for breathing apparatus I doubt that they
would have any reservations about fillling an aviation bottle from
their supply.

David Johnson