RedactedNarrative: Vessel 1 was traveling upstream on the Missouri River at ~5MPH from the Kipp recreation area boat ramp.  Vessel 2 was also traveling upstream on the Missouri River, but at a speed of ~ 18MPH.  
  
  There was dense fog on the river during the time of the crash, vessel 2 collided with the outboard engine and transom of vessel 1.