AT APPROXIMATELY 2300 ON 6/17/11 UNIT 1 WAS DRIFTING WHILE FISHING APPROXIMATELY 0.75 MILES NORTH OF THE WATEREE DAM. UNIT 2 WAS CRUiSING IN A NORTHERLY DIRECTION UNKNOWNingLY APPROACHING UNIT 1 FROM ITS STARBOARD SIDE. UNIT 2 SWERVED IMMEDIATELY PRIOR TO IMPACT AND UNIT 1 ACCeLERATED IMMEDIATELY PRIOR TO THE IMPACT CAUsING A COLLISON AT UNIT 1S STARBOARD STERN AND UNIT 2S PORT BOW. ONE PASSENGER FROM UNIT 2 WAS TAKEN TO KERSHAW COUNTY MEDICAL CENTER FOR PRECAUTIONARY TREATMENT AND THEN WAS RELEASED. THERE WERE NO SIGNS OR COMPLAINTS OF INJURY FROM UNIT 1.