Posted by TDI_2 on May 08, 2002 at 15:02:54:
In Reply to: Re: This sounds like a tempest in a teapot posted by Steve on May 07, 2002 at 22:47:17:
The 120 rule works for all gasses. The more O2 in your nitrox, the better it works, as long as you mind your PO2 depth limit.
Lets see if I can remember/calculate the PO2 depth limits for the cold water 1.4 benchmark:
air = 185 fsw @ benchmark 1.4 PO2
EAN 25 = 150 fsw [ditto 1.4]
EAN 32 = 110 fsw [ditto 1.4]
EAN 36 = 95 fsw [ditto 1.4]
Then your max time at 95 fsw on EAN 36 comes to 120 - 95 = 25 mins. Close enough, to any EAN table.
DO NOT forget egression by halves, 1 min first stop, 2 mins second stop, 3 mins third stop, 5 mins last stop.
Your wife can sue me if you die. But I think you will be very safe.
You will be safer still if you change the battery regularly in your dive computer and stick with that. My dive computer has 3 personal settings: thin, fat, and old. :)
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