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There's no real need in open water for
nitrox, except for commercial or teaching
exposures. The mixtures you're taking about
aren't enough for deco. It is, however, quite
useful in cave diving for both shallow long
dives, and for deco, and its especially useful
to the guys that teach it - it produces a
distict swelling of the wallet.
The problem is that those who teach it
don't bother to tell the whole story, or
require the kind of examinations that would
shed some light on one's ability to tolerate
the stuff, or screen their students, or teach
the right partial pressures to dive nitrox, or
fully understand the counterindications for
using nitrox. They are all of course experts
on the equipment they think is required to dive
it, including an incredible fantasy regarding
o-ring materials and "O2 cleaning".
What will happen is that enough people will
be unnecesarily butchered, one good expert wit-
ness will get in court, and we will have no more
insurance and massive regulation.
I can't wait to hear some of you guys howl
when you see the price of "life support" equipment
when it is regulated by the FDA.
- George Irvine
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