Mary,
You go swimming and use your body as the drough chute at the bow to turn the boat into the wind. This time it is body drag in the water rather than body weight on the righting line to assist righting.

Steve,
To reach the shroud lever, you first step up on the mast and then reach over to the shroud lever to open it on a narrow boat.
I first developed this system on a 12ft wide boat. There are ropes strung between gromets on the bottom of the tramp forming a ladder between shrond levers when the boat is turned over. At each shroud lever there is a slit in the tramp about 1ft long with a lacing across it. Untie the lacing and reach through the slit and open the shroud lever. Step back down on the tramp and pull on the righting line. The upper shroud extends approximately 18inches. The platform pivots about the captive mast step ball. The bottom hull moves toward the sail 18 inches while the upper hull moves away from the sails 18 inches, 3ft of relative motion change between hulls. The upper hull has moved in the weight balance from a position of retarding righting the boat to a position of helping right the boat. One person can right a 12ft wide SC20 at 450 pounds. When the boat comes up, the shroud that has been extended is to leeward. Keep the nose of the boat toward the wind so that the leeward shroud remains slack so that the leeward shroud can be returned to its original length and tightened by closing the lever. Once the lever is closed and the locking pin back in place, everything is back to normal and the sailing can continue. This is 1978 SuperCat technology.
Bill