RedactedNarrative: Vessel was traveling on plane upriver when the lower unit struck the end of a floating log that was about 6" below the water surface.  The impact stopped the boat instantly throwing both the Operator and Passenger overboard.  Vessel continued to run at high speed in circular patterns near the victims.  Neither party was wearing a PFD.  The Operator went under water and was recovered by search crews several hours later.  The Passenger was rescued from the water from citizens who heard the crash and responded in their own boat.