"Wayne.B" wrote in message
news
On Fri, 9 Nov 2007 11:10:37 -0800, "Calif Bill"
wrote:

tuna seem to be attracted by the vibrations of the
bigger boats.


Bottle nosed dolphin certainly are. Our trawler is a veritable
dolphin magnet. We can sometimes see them coming from hundreds of
yards away.

That's because they are doing three times your speed. :-)

Eisboch