Pretty cool. When I saw the headline, I expected a boat hull filled with some sort of lubricant and another hull inside, containing the "actual boat," such that the "actual boat" would always be level. In terms of form, this would be similar to a Double Boiler (http://en.wikipedia.org/wiki/Bain-marie). I always assumed that this would be how to stabilize objects like this. It's interesting to see it done in a different way. I wouldn't have imagined such a design. With the lifted body and the long legs, it vaguely reminds me of a waterbug (http://en.wikipedia.org/wiki/Gerridae).