Take a look at this!

Pretty old technology though, it's been around for ages. Seem to remember one like it at least five years ago.
 
Wonder what speeds it can achieve.
I think i'm right in saying the open sea speed record for a wind powered craft is a Cat built buy Phillips (I think), It's some crazy speed like 52 knots. Windsurfers aren't far behind with 47 knots being achieved on speed canels. St Marie (france), West Kirby (up north).

Chris

Relaxation starts at the pontoon gate
 
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