RedactedNarrative: 38 foot sailing catamaran attempted to beach on the shoreline of keewaydin island. Vessel ran aground on a shoal just prior to the shoreline. Due to sea state, vessel slammed into beach several times, causing a crack along the keel pf one of the hulls, causing the vessel to begin taking on water. Vessel was towed by commercial towing service to safe harbor, pumps placed in the hull and damage was assessed. Vessel left until it could be pulled from water on regular business day.