RedactedNarrative: On September 6, 2016 two vessels were out on Willard Bay Reservoir.  Vessel one was towing a tube with three occupants and vessel two was towing a knee boarder.  Both vessel one and vessel two were under way when vessel two struck vessel one on the port side.  
  
  Both operators stated they did not see the other vessel until it was too late.  Vessel one stated the impact from vessel two spun the boat around causing him to believe he caught the propeller on something.  Operator one stated he was watching another boat off in the distance.  Vessel two's operator stated he was watching the child on the knee board through a mounted mirror.