Hey, does anyone know where Cis Lunar rebreathers are going to be at DEMA? I've been hearing good stuff about what they are about to release, and I want to check it out.
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Cis Lunar at DEMA?
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Hey, does anyone know where Cis Lunar rebreathers are going to be at DEMA? I've been hearing good stuff about what they are about to release, and I want to check it out.
Are you referring to Mk VI? If so, it is sold by Poseidon in Europe, so I'd look there. There was a post on RebreatherWorld.com that said someone from Poseidon said at the Long Beach Scuba show that they weren't handling it, so there might be some distribution issues that need to be ironed out. I have no first hand knowledge, though.
Unless there have been tremendous changes to what they showed last year at DEMA, it is probably the last rebreather I'd buy.
-I would not dive a CCR with 2 cells, I don't care how sophisticated the electronics are
-I would not dive a CCR that forced me to use prepackaged scrubbers
-I would not dive a CCR that did not have independent PO2 monitors
-Over the shoulder counter lungs don't work for me
-The Bail Out Valve / DSV thing is too big for me to deal with
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I confirm that the Mark VI rebreather was launched by Poseidon at Dema 2007 in Orlando and it is selling now in Europe since than. There is lot of information on www.poseidon.se
Ciao.
Nicoletta
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Thank you, everybody!
After speaking with Brian Greene about it at length, I was totally sold, and want to see it in person at DEMA.
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The RBW write up is HERE
Here are some interviews I shot last year with Richard Pyle and Bill Stone, very informative if you are interested in this rebreather. Watch the Richard Pyle one first.
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Are you referring to Mk VI? If so, it is sold by Poseidon in Europe, so I'd look there. There was a post on RebreatherWorld.com that said someone from Poseidon said at the Long Beach Scuba show that they weren't handling it, so there might be some distribution issues that need to be ironed out. I have no first hand knowledge, though.
Unless there have been tremendous changes to what they showed last year at DEMA, it is probably the last rebreather I'd buy.
-I would not dive a CCR with 2 cells, I don't care how sophisticated the electronics are
-I would not dive a CCR that forced me to use prepackaged scrubbers
-I would not dive a CCR that did not have independent PO2 monitors
-Over the shoulder counter lungs don't work for me
-The Bail Out Valve / DSV thing is too big for me to deal with
What do you think of the Open Revolution Apocalypse? (even though EACs must be used for now)
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Are you referring to Mk VI? If so, it is sold by Poseidon in Europe, so I'd look there. There was a post on RebreatherWorld.com that said someone from Poseidon said at the Long Beach Scuba show that they weren't handling it, so there might be some distribution issues that need to be ironed out. I have no first hand knowledge, though.
Unless there have been tremendous changes to what they showed last year at DEMA, it is probably the last rebreather I'd buy.
-I would not dive a CCR with 2 cells, I don't care how sophisticated the electronics are
-I would not dive a CCR that forced me to use prepackaged scrubbers
-I would not dive a CCR that did not have independent PO2 monitors
-Over the shoulder counter lungs don't work for me
-The Bail Out Valve / DSV thing is too big for me to deal with
Hi Ryan, could you please tell more as for the reasons to your decisions - it would be great to learn more.
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Hi Ryan, could you please tell more as for the reasons to your decisions - it would be great to learn more.
Hello Aqua_soul,
I am not Ryan
but some of the reasons for those statements are:
This is mainly (please correct me if I am wrong-I would not dive a CCR with 2 cells, I don't care how sophisticated the electronics are ) because you are going to breath a gas which will have a % of oxigen based in the analisys of those cells that are very calibration, maintenance, time of use, position... dependant. So using only two seems very risky (what if one of them tells you that your ppo2 is 0.2 and the other one 1.6? if the rebreather considers that the first one is right (being the wrong one) then it will put more o2 in the mix delivering a hyperoxia mix and, in the other way around, it would reduce the o2 in the mix producing a hipoxia mix. Both cases will eventually kill you. These are extreme differences but with lower differences you might be breathing a ppo2 of 1 while the computer is reading 1.3 giving you less deco time than the real one needed... There are several cases and this is why most rebreathers use 3 or 4 or even 8 cells.
This is because prepackaged scrubbers are more expensive, harder to find and not available in a lot parts the world.-I would not dive a CCR that forced me to use prepackaged scrubbers
Again, redundancy is the reason. Having, for example, three cells connected to one O2 monitor and a fourth one to another one completely independent would give you more safety than relying only on one.-I would not dive a CCR that did not have independent PO2 monitors-Over the shoulder counter lungs don't work for me-The Bail Out Valve / DSV thing is too big for me to deal with
This is more of personal taste but I understand that having a big camera kit is more comfortable with backmounted lungs (they will not interfere in between the arms...). The bigger the bail out valve the harder is to look through the viewfinder.
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What about the constant comparison to the diluant as a control gas?
I'd like some feedback after you watch these two videos:
Richard Pyle: http://www.rebreatherworld.com/video/Dema%...le_CisLunar.mov
Bill Stone: http://www.rebreatherworld.com/video/Dema%...ne_CisLunar.mov
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What about the constant comparison to the diluant as a control gas?
I'd like some feedback after you watch these two videos:
Richard Pyle: http://www.rebreatherworld.com/video/Dema%...le_CisLunar.mov
Bill Stone: http://www.rebreatherworld.com/video/Dema%...ne_CisLunar.mov
I cannot get to see the videos (probably took them down or changed the link).
But if I had to choose between both new (both bets) MK VI (which still seems to be a mystery after so long) and the O.R., I would choose the O.R. right now.
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Hey Eric-
I missed your question earlier. David did a great job answering for me on the other points, and your question didn't pop up in my new posts for some reason.
What about the constant comparison to the diluant as a control gas?I'm not a luddite, and I don't reflexively think that something like this can not work. I'm all for smaller, cheaper, easier to use, and easier to maintain rebreathers that are safer. I commend companies like Poseiden/CIS Lunar(whoever is doing this), CCRB, and OR who are building electronics to ensure that their rb is functioning properly with multiple independent validations.
My issue is that I've had cell failures on dozens of dives, or wet cells that lag behind (or read low). If I were diving with mk vi, the electronics would have told me to bail out and ascend... My brain is smarter than that. I use the cell data available to me and my diluent as a control gas, evaluate which cell has failed, and vote that out in my head. I dive with 4 cells in either a double redundant or triple redundant fashion, and I have completed dives with only 2 functioning cells. I also descend on o2 on EVERY dive to validate that my cells are not current limited and will read 1.6 at 6m.
Obviously this requires some problem solving ability, and some concentration. But it also allows me to stay in the water more. I'm afraid that the number of thumbed dives from the mk vi system will be intolerably high.
I'm very intrigued by the OR Apoc. I don't think it is the right choice for me, but I think that what they are doing is very cool if they can deliver what they promise.
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RBW is under new ownership and changed servers.
They can still be viewed here.
The RBW write up is HEREHere are some interviews I shot last year with Richard Pyle and Bill Stone, very informative if you are interested in this rebreather. Watch the Richard Pyle one first.
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Are you referring to Mk VI? If so, it is sold by Poseidon in Europe, so I'd look there.
it is not yet sold in Europe, probably waiting for CE
paul
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I'm itching to see one of these units and here in the UK we're expecting the first fifty to arrive in a few weeks. Try dives are then possible and as I live very close to a major inland centre which is also a Poseidon dealer that should happen quite quickly.
As I understand it the two O2 cells operate on an entirely different basis to the 'voting logic' of three cells commonly employed in RB's. Bill Stone's rationale of continuous validation seems well thought as does the unit generally.
I'm advised that whilst the Disco is designed for recreational 'no stop' diving it will handle 'inadvertant' decompression diving. A P port in the counterlung, O2 cell and VR3 will probably do the trick nicely... A tech upgrade is planned and the ability to handle normoxic (maybe hypoxic?) mixes too. As a matter of course I'd run this unit on a normoxic blend just to give me a little more scope and take the edge off any narcosis. Hey, what does a 3 litre fill of 20/20 cost? I think the Disco will accept up to 7 ltr cylinders too so thats my suit and wing inflation catered for too.
Bring it on
