While I do not have personal experience with this method, I read in a catamaran book that the best way to use a power boat to right a turtled beach cat was to tie the rope to the base of the mast, bring that rope directly aft over the trampoline (the rope goes on same side of the tramp you are now standing on). Then standing at the stern of the boat to help submerge it, the power boat pulls the cat so that the sterns goes down and the bows pull up and over. This method avoids having the tow rope touch your fragile hulls. It made a lot of sense to me.
As others have said, not a good plan. Will destroy your rudders and if the boat does not come up instantly then the mainsail will start to "fill" underwater and put a massive strain on the mast etc.
I've been involved in righting a Tornado in Southampton water when it was starting to get dark (I was standing off in another Cat.
Boat had gone turtle and even with 4 people on board we could not right it (non sealed mast); luckly the UK tordado Chairman was around and had a RIB.
1, Take tow rope from RIB to the Boat, over the top hull and loop around (twice in this case I think)the mast and then back over the hull to one person who then holds it (so that it can be released if the need arises). Also ensure there are two people on the RIB; one driving and one with the other end of the rope (again around a few turns so the rope can be dumped from either end)
2, Move all the weight back onto the leaward hull (as per notmal "right from turtle procedures") and use the RIB to assis
[color:"red"]VERY SLOWLY [/color]. With time the boat with the extra pull (GENTLE) will right to capsized. The crew then
may be able to right it them selves, in our case this was not so as the mast was full of H2O.
3, Now the RIB will need to be moving a little faster as the boat is on it's side will be much easier to pull (You MUST ensure that the dagger/centre boards are [color:"red"]
UP [/color] as when the boat does right it's self it will have some sideways motion.
At this point the Rope man on the RIB and on the boat are critical as as soon as the boat is starting to come up towards upright you must stop the RIB and/or dump the tow as the boat needs to slow the sideways movement (this will actually assist it righting it as well) before it is upright (hence raiding the plates so that if the boat does not trip (sideways) on the pleates and right too quickly.
