RedactedNarrative: After speaking with both operators it was determined that the pontoon was not under power and nearly stationary south of the marina idle zone.  The pontoon was positioned near the east side of the reservoir near the 200' buoys placed by homeowners and was facing north.  The yamaha was traveling northbound towards the marina idle zone towing a passenger on an inflated tube.  
  
  Operator2's passenger fell from the tube and operator2 turned right (clockwise) to pick up his passenger.  Operator2 failed to see the pontoon to his right prior to making the turn.  Operator2 observed the pontoon prior to the collision and altered course and reduced the throttle.  Reducing the throttle on the jet powered watercraft decreased the ability to maneuver and the port bow of the yamaha struck the port side of the pontoon.
  