The picture on the right was taken on 16th March 2013, when the little boat joined Snoopy Sloop 9 on 24/7 duty - by accident: the twin brothers say "hello" as they repeatedly try to bump into each other.
Two pictures from the video are below ...
The windmill made this small boat a bit too top-heavy - but it worked for a minute or two ! :-)
Without the windmill, this little robot boat, with the same autopilot, completed the Bray Lake Test route, of 1/3 mile, in 11.5 minutes - that's 1.75 mph.