RedactedNarrative: UNIT #1 WAS TRAVELING SOUTHBOUND INSIDE OF THE BREAKWALL THAT SEPARATES MILWAUKEE'S OUTER HARBOR WITH LAKE MICHIGAN. IT WAS NIGHTAND THE HARBOR WAS DARK. THE OPERATOR OF UNIT #1 STATED THAT HE WAS ADJUSTING SOME OF THE ELECTRONICS ON THE VESSEL WHEN HIS SHIRT BECAME ENTANGLED IN THE THROTTLES OF THE VESSEL. THE OPERATOR STATED THAT HE ATTEMPTED TO REMOVE HIS SHIRT, AT WHICH POINT, HE ACCIDENTALLY THRUSTED THE THROTTLE FORWARD, CAUSING THE VESSEL TO COLLIDE WITH THE BREAKWALL APPROXIMATELY HALF WAY BETWEEN THE MAIN AND NORTH GAPS (43'02.331N, 087'52.931W).. THE COLLISION CREATED A LARGE GASH IN THE HULL OF THE VESSEL. THE OPERATOR TIED THE VESSEL TO THE WALL. THE VESSEL HAS MOSTLY SUNK AND HAD TO BE SALVAGED BY THE NEXT DAY. BOTH THE OPERATOR AND THE PASSENGER DECLINED MEDICAL ATTENTION ON SCENE.