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Kevin I have quite a few dives on rebreathers over the last 30 years or so and unlike you I have had caustic cocktails. Including a couple on bio marine units. They are rare and with proper use and of course a good desing should be rather scarce. The updated version of the odessey though that you seem to have stong feeling against even though you have not seen or used one is no more susceptiable to this problem than other units. By the way you may be shocked at the capability of this 'passive semi closed system", it maintains a FO2 within 2% of the supply gas regardless of depth or workload. It is a depth compensated biased unit thus gets more efficient with depth. Starting with a equivalent 5 to 1 ratio (gas supply0 at the surface to as much as 50 to 1 at 10 ATA. It avoids hyperoxia,and hypoxia problems with only hypercapnia being a problem if one floods the cannister. It is eaiser to breath than open circuit SCUBA. It is a100% mechnaical device. In short it is an great diving tool that will probably see a lot of use. It is the only semi closed system that I know of that is compatiable with tech diving and in this area it rivals all fully closed units I'm aware of. Yes I still love the cis lunar and the UT's, the inspiration, and the biomarine they all have there own distinict advantages. George on caustic my lips are still sore today but you do not get dehibilated from a cocktail it just is unpleseant and a signal to bailout. Tom heyydude@pi*.co* wrote: > > Since rebreathers are becoming the hot topic on this board, and folks are > talking about "Caustic Cocktails" - I thought I'd throw in my two cents... > > First, since I wanna dive with a full face mask, I have tried a couple. In > the process, I have flooded my canister with sea water and pool water on > more than one occasion. (I've now found the ultimate combination - the AGA > mask with silicone lube to seal against my manly beard). > > NEVER have I got a "Caustic Cocktail" that everyone is wailing about. My > unit (the BioMarine CCR-155) handles accidental water flooding so well, > that I would have to intentionally flood water through the thing to get any > to come out of the intake hose, like maybe putting my garden hose in the > exhaust side, and letting it run for a while... > > In fact, every time I have had a major flood, the unit continues to perform > perfectly, I hardly noticed that I had got water into the system. If it > weren't for the Kogel valves bubbling in my DSV I wouldn't have known at > all. > > I don't know how the Cis Lunar handles this, but it sounds like Rich is > pretty happy with his. He must be, since he is going to start using > Lithium - if water touches that stuff, the unit will explode, sending the > diver and all his rare undocumented fish flying like Superman over the > reef... > > While this is a sight that might bring a smile to the faces of Dick King > and all the BioMarine divers, we'd still hate to see it happen since us > rebreather dudes got to stick together... > > The only "Caustic" you're going to get with a rebreather is "Caustic > Comments" if you show up wearing an Odessey, or try to dive one in a cave > next to Geo. and his boys... > > Later. > > Kevin > HeyyDude > -- > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > Send subscription/archive requests to `techdiver-request@terra.net'.
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