RedactedNarrative: Vessel 1 Operator was off throttle, drifting into a pier, towing a three-person tube with 2 people on the tube.  When close to shore, the water was shallow, so both passengers got off the tube to wade to shore.  The wind blew the tube under a pontoon boat docked to the west of them.  The injured person grabbed the rope for the tube to pull it from under the pontoon boat.  The tow rope was wrapped around the injured person's right hand; the tow rope got sucked into the PWCs intake and was pulled tight when the Vessel Operator manipulated the throttle.  The Injured person's right pinky finger was pulled off at the first knuckle and the middle finger was severely damaged.