"Nav" wrote in message
...
I don't get it. Please explain what a grounded boat tied to pilings has to
do with a wing keel? We do that all the time to scrub the bottom.

Cheers

John Cairns wrote:

http://community.webshots.com/photo/...01340379iqXpQy

John Cairns

Yeah, you have tides, published data, we have seiches, wind driven, and they
can raise the water level dramatically in a short period of time. They tend
to be more dramatic at the beginning and end of the season, which correspond
generally with the annual high and low water level levels of the Lakes.
John Cairns