RedactedNarrative: UNIT 1 WAS APPROACHING THE DOCK AT LIBERTY ON THE LAKE ON LAKE MURRAY TO OFFLOAD A PASSENGER.  UNIT 2 WAS TIED OFF TO THE DOCK.  WHILE ATTEMPTING TO DOCK, THE OPERATOR OF UNIT 1 PUT THE THROTTLE IN FORWARD INSTEAD OF REVERSE.  UNIT 1 STRUCK UNIT 2 CAUSING DAMAGE TO UNIT 2'S HULL.