Quote Originally Posted by Kxmoomba View Post
These ones have a stabilization specifically for water use.
http://www.babysearock.com/index.html
I'm guessing "stabilization" = bungees instead of rope or webbing. Seems like that wouldn't be terribly hard to retrofit and that a "boucer" chair would already have it built in... (just trying to save a guy from dropping the whole $150, because that seems steep). But yeah, the concept is sound.