On Thu, 20 Nov 2003 13:52:41 GMT, "Wally" wrote:

Does the concept of 'lift' apply to the fins or other underwater structure
on a sailboat?

If it didn't steering would be difficult wouldn't it?

If so, and if water is non-compressible, then what is its effect and how
does it work?

Higher forces on one side than the other. The same effect that keeps a
water skier on the surface and the reason symmetrical airfoils work.

Rick