RedactedNarrative: According to the operator, they were motoring to a spot to teal hunt and turned into an area known as Deep Slough.  Almost immediately V1 struck an unknown object below the water's surface.  The outboard motor was sheered from its mounting bracket and flipped up into V1; striking the victim in the head.  The victim received 3 strikes from the propeller and was thrown forward onto the gun box on the starboard side.  The operator immediately called 911 and began life saving measures on the victim. 
   
  EMS responded to the scene where they stabilized the victim and prepared him for medflight. 
   
  The operator advised they were both wearing their PFDs at the time of the accident.  The operator willingly submitted to a BAC test the results of which were negative; he had not consumed any alcohol or drugs prior to the accident.