Posted by CalAbDiver on July 02, 2001 at 09:00:34:
In Reply to: Re: Written for those that are considering getting into tech diving... Long posted by Jeff B on June 28, 2001 at 10:15:48:
I dont know if that is just a coincidence or not, but 130' is the max safe dosage limit for N2 narcosis in advanced nitrox classes for tech diving. I have read that 130' was arbitrarily chosen as a limit for air dives, but the N2 narcosis at that depth does become severely limiting.
I agree with you that 130' is too deep to safely dive on air. G.U.E. also stipulates that anything over 100' depth should be Trimix territory. G.U.E. and D.I.R. agree about that.