RedactedNarrative: Vessel 1 was traveling west inside the Cleveland harbor on plane.  Operator 1 decelerated to navigate waves and fell overboard.  Operator was not wearing a kill switch and the vessel continued to do circles.  Vessel 1 then struck the breakwall and sustained damage to the port side causing the vessel to become partly submerged.  Operator 1 was rescued by a Good Samaritan and vessel 1 was towed in by another vessel.