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Perusing the recent posts, I noted the following quote from scubadoc in _persistent diving related sickness_: >>> Now, it gets interesting! Consider that this might be the result of multiple shallow dives effectively lowering your complement blood levels causing this picture. One of the...

Thanks, Dan. As for your response to #6, I think I oversimplified Irvine's argument. Remember, as I noted in #2, Irvine believes the 80/20 is merely compensation for poor buoyancy control skills. One response to this has been the rough seas argument. You're diving on the Andrea Doria, and you...

Should decompression be accomplished on pure O2 or on an 80/20 mix? Some of the tech agencies teach deco on 80/20 because a sudden change in the weather or loss of buoyancy control due to emergency conditions can make deco on 100% O2 dangerous. They are also beginning to argue that breathing...

Although Walter is correct in his description of the donor choice program generally, donations to DAN through the United Way don't work that way. DAN is not a United Way recipient and as such does not have a United Way budget. DAN is, however, an eligible recipient of funds. Any money you give...

It was probably either a sinus squeeze or refered pain from a tooth squeeze. If your sinuses are okay and the problem persists, you might want to see your dentist.

I have been diving Nitrox for several months now, and I'm still not sure about its purported magical effects (I dive Nitrox primarily because it gives me longer bottom times). My wife and several of our friends swear they always feel "better" after a Nitrox dive than after diving air. I, too...