RedactedNarrative: Vessel #1 occupants were fishing on Birch Lake, in a cove .3 miles south of Birch Cove boat ramp.  Vessel #1 operator stated he was in the front of the vessel operating the the electric trolling motor.   Vessel #1 operator and Passenger #1 were  wearing Type III auto inflatable PFDs.  Vessel #1 operator stated that Passenger #1 was fishing at the aft of  the vessel.  Vessel #1 operator stated he heard a splash, and saw Passenger #1 floating in the water.  Vessel #1 attempted to hold Passenger #1 head out of the water and operate the trolling motor to get to the shore to attempt CPR and call 911.  After a period of time Vessel #1 operator placed Passenger #1 in Vessel #1 and transported him to Twin Cove boat ramp  2.5 north.  He was met by Osage County Deputy, Barnsdall Police officer and Mercy EMS.  Mercy EMS transported Passenger to Tulsa St John Medical Center were they pronounced Passenger #1 deceased. Cause of death is most likely due to natural causes. 
  *All measurements are approximate*