Interesting reading here

http://books.google.com/books?id=wSGPcXH...t=result#PPA109,M1

deals with some interesting ideas, including ocean racing's most tragic figure, Donald Crowhurst, who devised an interesting system. I recall a reading about a Canadian that was building an aluminium cat that had a righting system that involved flooding the bows to get the hulls standing up bow down in the water. To right the boat he would then hoist a waterbag on a boom attached to the underside of the craft to bring the stern down after which he could pump the bows empty again. Unfortunately I can't seem to find his site anymore, because I remember seeing diagrams in which he clarified the idea. Another idea is from the Exploder 25 which was discussed some time ago on this forum aswell. http://www.exploder.info/eng/content/view/42/124/