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On Thu, 8 Aug 1996 heyydude@pi*.co* wrote: > Dudes (and dude-ettes), > > I thought for the benefit of the readers of this list I would relate my > experiences yesterday on a 275' rebreather dive off of Catalina Island. Kevin: what I said was that experienced divers will overbreathe the unit while exerting themselves. To correct this, stop the exertion. If this doesn't help then place the counterlung below your own lungs (put your feet at 7 o'clock and head at 1 o'clock and you will be able to breathe with great ease. If you believed that your canister was flooded, then breathe the unit semi-closed while adding diluent manually and you will get rid of much CO2. In actuality, modern scrubber material will perform admirably even when damp. Kevin, I was stunned to see this post. You left out two important facts- this was the first ever trimix dive for you and it was the deepest you've ever taken the rebreather. The unit started doing something to you that you didn't understand and you basically forgot everything you've been told to do in an emergency. Hyperventillation and panic nearly did you in. You are my friend and I am responsible for you having that rebreather and you are making me very nervous. My advice -that I will give you for the umpteenth time- is you need to get rid of the FFM and dive the unit with a mouthpiece for many hours and then come back to the FFM. You may still experience what happened to you at depths shallower than 150 (your cutoff for FFM use) under some conditions with a FFM. The reason I felt compelled to reveal the two important facts you omitted is because you wanted the post to be a learning experience for potential rebreather divers- the two omitted facts stated clarify that this was not a rebreather problem. > > My understanding from Rod is that these kinds of things have happened to > all kinds of experienced divers, so it would appear that while maybe not as > serious as what I went through, these issues should not be dismissed. > > I also want to say, that though I write about John and Rod trying to kill > me in my "Last Dive" series, I am eternally grateful that these guys are on > my side - I wouldn't be here today if it wasn't for them... > > Kevin "Call me the Crash-Test Dummy of Rebreathers" > 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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