RedactedNarrative: Vessel #1 was westbound on Keystone Lake in the Appalachia Bay area near Houseboat Island. Vessel #2 was eastbound on Keystone Lake in the same area as vessel #1. 
  
  For unknown reasons, vessel #1 made an abrupt course change and turned in front of vessel #2. Vessel #2 was underway at speed and was unable to make an immediate course correction. Vessel #2 subsequently struck vessel #1 and completely overrode vessel #1. Upon being struck by vessel #2, the operator of vessel #1 was ejected.
  
  POI was approx. .5 miles south of E. Basin Rd and approx. 1.3 miles east of Akdar Park.
  Unknown how far the operator of vessel #1 was ejected due to his immediate recovery from the water by bystanders.
  
  Investigative note: Due to the time of day, clear weather conditions, and westward travel of vessel #1. Trooper believes the setting sun was probably obscuring vessel #1's operators' vision from seeing vessel #2 on an eastbound approach.