Quote: (Originally Posted by
warjarrett)

Are there dangers in breathing closed-circuit at the surface, that are greater than at depth? What is the concern, and why is it a bigger problem at the surface?
I hope you know the answer to this question already.
If you dont know the answer to this you might want to consider if you are knowledgeable enough to be diving a rebreather - this is IMO fundamental stuff - have you done a course? was this not covered? perhaps you just forgot. If you really dont know then perhaps you should do your self and your family a favour and sell it or get some formal/better training before we read about another shallow water/surface rebeather death - hey you could be this months lucky winner! Hmm......Wonder who it will be that dies this month? The suspense is killing me (if you excuse the pun)
sorry for the rant - haven't had my morning cup yet - and am still bothered by the 1 death/month on rebreather thing. When I read a question such as this that is 'basic' being asked by a Rebreather diver I just think something is really wrong somewhere. Is it the training? students retention of facts? what is it?
Maybe you had a legitimate reason to ask this question and are aware of the answer in which case my apologies.
There was a good thread about this before here you may want to look up in the archives