RedactedNarrative: Swimmer in water approximately 13'' off starboard bow, mid-ship.  Vessel was at drift, then engine was started and placed into reverse to back up in order to avoid an ''at drift'' collision with a rocky shore line.  
  
  Vessel reversed into a starboard u-turn direction, backing into and over a swimmer who was associated with the vessel.  Swimmer unable to swim clear of the oncoming, reversing vessel.  Propeller injuries resulted to swimmers right leg, arm and buttock.  Vessel was a rental vessel.  Operator had no experience with vessel operation.  See NDOW report # 20wl00171 for further details.