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Drmike · 8th April 2008, 12:32

Quote: (Originally Posted by Mike)

For most of us doing normal depth dives - yes. But I sure as hell wouldn't be betting on it at 200m when there is only ~5% O2 in the loop.

I don't think I'm good enough to pick loop volume that closely - perhaps that's why I don't do 200m dives.

Mike

Hi,

at -200m depth you dont need high ppo2 (no advantage to deco) you can therefore allow your ppo2 to drop a load and it will have little to no effect on deco (at these depths) so you can get away with just breathing your loop down and not add O2, only dil, untill you get to shallower depths where elevated ppo2 is needed.

Running min loop will interfere to a degree with full ventilation - something that Id want to avoid at extreme depth

basically I dont plan on runing min loop at -200m depths

with a reasonable fo2 dil, with the lack of benefit of maintaining high ppo2 at depth, and with the shortness of time spent at depth- theres just no need

8th April 2008, 12:32	#142 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,290	Re: mCCR and zero viz exit Quote: (Originally Posted by Mike) For most of us doing normal depth dives - yes. But I sure as hell wouldn't be betting on it at 200m when there is only ~5% O2 in the loop. I don't think I'm good enough to pick loop volume that closely - perhaps that's why I don't do 200m dives. Mike Hi, at -200m depth you dont need high ppo2 (no advantage to deco) you can therefore allow your ppo2 to drop a load and it will have little to no effect on deco (at these depths) so you can get away with just breathing your loop down and not add O2, only dil, untill you get to shallower depths where elevated ppo2 is needed. Running min loop will interfere to a degree with full ventilation - something that Id want to avoid at extreme depth basically I dont plan on runing min loop at -200m depths with a reasonable fo2 dil, with the lack of benefit of maintaining high ppo2 at depth, and with the shortness of time spent at depth- theres just no need __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment Last edited by Drmike : 8th April 2008 at 12:36.
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