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Scott,

I really do not see ANY narcosis advantage to using Ntx27 at 160ft
versus air at the same depth.  Narcosis should be essentially the same,
the PO2 is higher (so there is a decompression advantage, but also an
increased O2 tox. risk if the exposure is other than short).

I personally do not think that deep air experience is necessary prior
to trimix training, but do feel that a very heavy dose of decompression
diving, stage bottle usage, and gas planning IS ESSENTIAL before trimix
training.

John
(johncrea@de*.co*)

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