RedactedNarrative: VESSEL ONE WAS TRAVELING SOUTH ON THE BLACK RIVER WHEN THE MOTOR STRUCK A SUBMERGED OBJECT.  THE OPERATOR STATED THAT THE BOAT BEGAN TO FISHTAIL BACK AND FORTH CAUSING HIM TO BE EJECTED OFF THE STARBOARD SIDE.  VESSEL ONE THEN CAME BACK AROUND AND THE OPERATOR WAS STRUCK BY THE PROP.  THE OPERATOR STATED THAT HE DID HAVE HIS KILL SWITCH LANYARD ON BUT THE SWITCH MECHANISM HAD BROKE DURING THE ACCIDENT.