Rebreather World - View Single Post - O2 for suit inflation on deep Rebreather cave dives

Drmike · 6th October 2006, 05:51

On some deep and/or long rebreather dives the limiting factor can quite often be the amount of bail out gas a diver can physically carry below the deepest/furthest staged gas point.

Optimising the tanks one carries to ensure max gas volume of breathable gas available to the diver at depth has to be balanced against the potential to overburden the diver with too many tanks making access to gear more difficult and creating more drag and too large a profile. Obviously if you have to carry tanks you want to make sure they all are, if possible, breathable at depth.

The process of optimising/minimising the gas (number of tanks) one carries can lead to such things as running wing inflation off one of the bottom bail tanks (instead of carrying another separate air (not breathable at depth) tank for wing. This however still leaves the issue of suit inflation. Obviously its not possible to run suit inflation of trimix also so this has got me thinking about running the suit off the off-board O2 tank.
(Often offboard O2 is needed on long/deep cave dives to supplement on board O2supply and provide redundancy)

Has anyone much experience using O2 for suit inflation?

If its possible then the diver would carry all bottom trimix bail tanks (one being plugged in as off-board dil for the same reason as the need for off board O2) and one offboard O2 tank.

Anyone know of any potential issues? Has there been any research done on this?

6th October 2006, 05:51	#1 (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: 3,128	O2 for suit inflation on deep Rebreather cave dives On some deep and/or long rebreather dives the limiting factor can quite often be the amount of bail out gas a diver can physically carry below the deepest/furthest staged gas point. Optimising the tanks one carries to ensure max gas volume of breathable gas available to the diver at depth has to be balanced against the potential to overburden the diver with too many tanks making access to gear more difficult and creating more drag and too large a profile. Obviously if you have to carry tanks you want to make sure they all are, if possible, breathable at depth. The process of optimising/minimising the gas (number of tanks) one carries can lead to such things as running wing inflation off one of the bottom bail tanks (instead of carrying another separate air (not breathable at depth) tank for wing. This however still leaves the issue of suit inflation. Obviously its not possible to run suit inflation of trimix also so this has got me thinking about running the suit off the off-board O2 tank. (Often offboard O2 is needed on long/deep cave dives to supplement on board O2supply and provide redundancy) Has anyone much experience using O2 for suit inflation? If its possible then the diver would carry all bottom trimix bail tanks (one being plugged in as off-board dil for the same reason as the need for off board O2) and one offboard O2 tank. Anyone know of any potential issues? Has there been any research done on this? __________________ Get a girlfriend you sad twat - a Rebreather is an unfaithful mistress - dont blind yourself to her faults just because she goes down on you Last edited by Drmike : 6th October 2006 at 05:54.
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