RedactedNarrative: Victim #1 jumped off the vessel to retrieve an item that had fallen overboard.  As victim #1 was swimming back to the vessel, the operator mistakenly thought the vessel was in neutral when in fact the vessel was idling in reverse.  Vessel backed over the victim as he was attempting to board.  Victim was struck by the propeller.  Victim sustained serious injuries to right arm, right hand, right leg and groin.  Local report # is 2017-026383