Rebreather World - View Single Post - Diluent selection and the great alpinist v siege debate

**Dave Sutton** · 31st December 2006, 23:02

Quote: (Originally Posted by bletso)

Dave,

In the main, I agree with a lot of your thread. However my KISS style DOCCR was designed to do 100MSW, far deeper than I would want to to do 21% diluent O2, even for short periods.

And at 100 meters that would be INAPPROPRIATE, just as inappropriate as diving 10% at 30 meters.....

If you mean 100 feet, 21% dil there would be a perfect choice.

All I am drawing attention to is the unwarranted use of GROSSLY LEAN diluents in rigs when there is no reason to do so and to suggest that PROPER mixes be used and that *WEAKLY RICH* mixes can be tolerated if used *correctly* to provide far better SCC and OC Bailout capability in addition to being able to be used safely shallower. I do not advocate *deliberately* mixing hot dil but simply state that we can use normoxic dils deeper than one might think *if we pay attention* and use all of their advantages thoughtfully.

Dave

31st December 2006, 23:02	#41 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: Diluent selection and the great alpinist v siege debate Quote: (Originally Posted by bletso) Dave, In the main, I agree with a lot of your thread. However my KISS style DOCCR was designed to do 100MSW, far deeper than I would want to to do 21% diluent O2, even for short periods. And at 100 meters that would be INAPPROPRIATE, just as inappropriate as diving 10% at 30 meters..... If you mean 100 feet, 21% dil there would be a perfect choice. All I am drawing attention to is the unwarranted use of GROSSLY LEAN diluents in rigs when there is no reason to do so and to suggest that PROPER mixes be used and that WEAKLY RICH mixes can be tolerated if used correctly to provide far better SCC and OC Bailout capability in addition to being able to be used safely shallower. I do not advocate deliberately mixing hot dil but simply state that we can use normoxic dils deeper than one might think if we pay attention and use all of their advantages thoughtfully. Dave __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com Last edited by Dave Sutton : 31st December 2006 at 23:47.
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