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> Since nobody seems willing to react or form an opinion, let me make it a

Sorry, some of us were out diving :-)

As for filling a tank with heliox and going diving...

Go back to your OW course.... what did they teach you?  Most likely
they mumbled something about gas going in and out of tissue...
mentioned something about the analogy with a bottle of carbonated soda
and handed you a table.  that table was valid for one paricular mix.
In most cases AIR.  the mix mattered not really to your level of
understanding.  You were taught to read the table which you tell
you that you could stay at X depth for Y minutes and everything
would forever be ok.  And that is what you did for your first
Z number of dives.

Would it have mattered if the gas mix had be some form of trimix?
Not if the table was for the mix and had the same risk factor.

Before you counter with saying you were taught better, I applaud
that, but most students are not.  for their level of understanding
the mix is pretty much not improtant so long as their
table matches it.

The (faulty) assumption most agencies stil make is that when
people dive mix they also use stage/deco bottles, and doubles,
and whatever else.  That is why these courses are held out as
so "mystical" and for only the "tek" diver.   Remove these
un-related skills and the mix course is in reach of MANY more
divers.

Mike
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