When I was in a sailing club in South Carolina I saw an old beach catamaran with a large round fender sitting on the tramp and a line tied to it going to the top of the mast like a halyard. Being the smart @$$ I am, I had to make a comment to some friends about it being a tether ball for the kids on days it was too cold to sail. Someone that overheard my comment explained that it was for righting the catamaran when it turtles. The line is run through the mast and dangles under the tramp. When the cat turtles the line can be pulled which pulls the end of the mast up to the floating fender. Its not nearly as good of a solution as buying a new boat but it is a lot cheaper.