Truly... and treasure hunters have been using them since ships sank... I have seen cannon protected that way... and anchors... usually pieces that cannot be kept submerged until they are cleaned and preserved.
LLS
20 posted on 05/28/2011 7:21:15 AM PDT by LibLieSlayer
("If you lie hard enough and sell your soul... you can scam your way to the top" barack obama)