I agree with everyone who said "don't do it"
It's called "hydraulic action" as the keel sinks at low tide the pressure is upward, no problem, they sit boats at yards on their keel.
The problem is with a rising tide forcing the hull up with the mud sucking the keel down. Good way to separate both. Take a look at my gallery, or google "wreck of the Irving Johnson" It took them two years to repair the hull.
Last edited by ianhlnd; 02-16-2007 at 08:45 AM.