RedactedNarrative: ON 05/26/18 AT APPROXIMATELY 1700, UNIT 1 WAS CRUISING AT A SLOW SPEED IN COOPER RIVER NEAR FREEPORT MARINA.  UNITS 2 AND 3 WERE TIED TOGETHER AT THE DOCK.  WAKE FROM UNIT 1 CAUSED UNITS 2 AND 3 TO COLLIDE WITH EACH OTHER REPEATEDLY.  UNIT 1 RETURNED A SHORT TIME LATER AND BEGAN CIRCLING THE AREA IN FRONT OF THE DOCKS.  UNIT 1 ACCELERATED AND RAN ON TOP OF UNIT 4 AT THE DOCK.  WITNESSES OBSERVED THE OPERATOR OF UNIT 1 SLUMPED OVER IN THE CONSOLE.  THE OWNERS OF UNITS 2 AND 3 BOARDED UNIT 1 AND ASSISTED WITH GETTING IT TO THE DOCK.  THE OPERATOR OF UNIT 1 WAS CHARGED WITH BUI.