WHILE CRUiSING UP THE COOPER RIVER TOWARDS FREEPORT LANDING UNIT 1 WAS FOLLOWING UNIT 2 ToO CLOSELY. UNIT 2 MADE AN ABRUPT TURN TO THE PORT NOT LEAVING ENOUGH REACTION TIME FOR UNIT 1. UNIT 1 COLLIDED WITH UNIT 2 DAMAGING THE HULL AND STRIKING THE OPERATOR OF UNIT 2 IN THE FACE. THE OPERATOR AND PASSENGER OF UNIT 2 WERE CARRIED TO FREEPORT MARINA WERE THEY RECEIVED MEDICAL ATTENTION.