On Sun, 20 Nov 2005 23:00:22 -0400, Terry Spragg wrote:

Brian Whatcott wrote:
All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in
through the mouth using a harden hose and exhale through your nose.
Good luck.

Good Luck indeed, because if you go too far you are liable to have your
lungs being sucked up the hose is what I heard (not sure how deep is too
deep, anybody?)

Or a powered snorkel pump on a float on the surface, know as a
hooka, and some dive weights.

that works, I've done that..

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