OPERATOR ADVISED HE WAS PULLING VICTIM WEST ON A TUBE, WITNESS STATED AS THEY ROUNDED THE ISLAND THE VICTIM CONTINUED TOWARDS A PIER INSTEAD OF FOLLOWING THE SKI. WITNESS STATED VICTIM STRUCK PIER AND THE VICTIM WAS AIRLIFTED TO COLUMBIA WITH A BROKEN RIGHT ARM AND FRACTURED SKULL. tHE VICTIM IS RECOVERING AND THE TOW ROPE WAS FOUND TO BE BROKEN.