Hello
Please take a look at these unusual boats that I play with. Maybe not the fastest you have ever seen, but are capable of interesting tasks. This first movie shows a cool survey in the San Diego model boat pond and if anyone was curious how deep it is then you can see (it is 7ft, by the way). You can also see a buried pipe running north south.
http://www.youtube.com/watch?v=aIE8Exu2yBw
cheers
Adrian