Here's a video of the first sea trial of the ASV (autonomous surface vehicle):
In this video, it's RC-controlled, not GPS-guided. It was pretty squirrelly to operate. It needs a fin and a more refined velocity curve to tame it. But I'm satisfied with its maximum speed.
More to come ...
Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away. -Antoine de Saint-Exupery