RedactedNarrative: Vessel #1 had been pulling a tube with occupant #3 on the tube. At the time of the incident, operator #1 was in the operator's position.  Occupant #2, was near the bow of the vessel when he felt the vessel go into reverse.  Occupant #3 was then struck by the propeller.  Occupant #4 was in the water with occupant #3 and was never identified or claimed any injury.