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On Fri, 1 Apr 1994, Mark Pansing wrote: > > > >Good choice, several of my friends have had CO2 buildup problems with > > > >the USD at depth (headaches, etc) the USD second stages are totally > > > >unsuitable for deep diving (+100 feet). > > > > > > Really?! I've had my SEA down to just over 200' and never a problem > > > yet, however it can be a little more difficult to breath at those > > > depths, but not so much so that I'd call it a *big* problem. > > Sorry to disagree, but I know alot of people up north here that are diving > with USD past 200' in very cold waters and they will dive with nothing else. I didn't say it couldn't be done. The fact is that it is harder to breathe from at depths greater than 150fsw and it does retain CO2 which does cause headaches and increase narcosis. Period. > Also I just reciently talked with some people from the US Navys > Experimental Dive Unit (They do all the test on regulators) and they > prefer USD over any other regulator. The EDU divers are nearly the worst group of divers who think they know what they are doing but really don't.
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