Wayne.B wrote:
On Wed, 11 Jun 2008 03:16:09 +0000, Larry wrote:

Wayne.B wrote in
:

On Mon, 09 Jun 2008 19:24:42 +0000, Larry wrote:

What I always thought we needed was a sort of underwater "curb feeler"
like we used to put on the pimpmobiles. A couple of stiff wires that
would protrude down into the water 3 ft from the BOW that would make an
awful griding noise
Such devices exist.

They are frequently called propellers.

When they grow up on steroids, we call them "screws", which make contacting
the bottom with them MUCH more exciting!

At 30 inch diameter are they props or screws? At $4k each I don't
think I could handle much more excitement.

At $4k they are called screws, as in, If you break one, you are screwed.