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On Tue, 7 Dec 1999 09:34:03 -0000, Gliviak, Jozef wrote: >Hello Sean, > >>Something like 5 minutes every 25, and they need to be to the >> LOWEST breathable PPO2 gas, ie. bottom mix. >>Do not add time to your stops to accomodate these (Air) breaks. >Sorry, just to make sure I understand well .Which option do you use >if your software tells you to do e.g 40min deco on O2: >1. you actualy do 25on O2, then 5 on low PpO2 gas and 10 on O2 - Total 40 >min. >2. or 25 on O2, then 5min break and 15 on O2 - Total 45 min In this case I would do 20 on O2, 5 on back gas, 15 on O2 for a total of 40 minutes. (cycle 20/5/20/5/ etc.) >>You also will notice an improvement if you use trimixes as deco gases, >>such as 35/30 and 50/25, in addition to the oxygen. >Please, would you be so kind and explain why is it good to add He to your >deco >gas (e.g 50/25) ? Everything I know tells me that Nitrox 50 would be more >appropriate. >I know that some guys use it this way, just couldn't figure out why it is >better. >As far as I know by using Nitrox you create highest presure differential for >Helium >causing it's accelerated offgassing. The Helium is a fast in - fast out gas, and does not do the physiological damage that nitrogen does to your system. The real issue is how you are trying to achieve the decompression - do it through proper application of the oxygen window rather than by maximizing your tissue supersaturation, and avoid ongassing nitrogen at the shallow stops. > > >Regards > >Jozef Gliviak >Slovakia -Sean -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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