"MontyJ" wrote in message
om...
saw this on ebay
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2489220926


Diving underwater with marine-plywood to keep the water presure out??

Hmmm, each 33 feet of depth is another atmosphere. Atmosphere is
what, 14.7 psi? So 33 feet is 29.4 psi? Wonder how much presure
plywood can take?