RedactedNarrative: OPERATOR 1 WAS OPERATING A TROLLING MOTOR (40LB THRUST MINN KOTA) ON THE BOW OF THE VESSEL. THIS TYPE OF TROLLING MOTOR IF SWITCHED FROM LOW THRUST TO HIGH THRUST, COULD HAVE THE CAPABILITY TO JERK A VESSEL AND MAKE IT UNSTABLE FOR A PERSON INSIDE. OPERATOR 1 FELL OVERBOARD AND INTO THE RIVER. THE VESSEL WAS MAKING SMALL CIRCLES AND TWO NEARBY WITNESSES STATED THEY SAW THE VICTIM IN THE WATER. THEY CALLED FOR HELP AND RETRIEVED THE VESSEL. OPERATOR 1 BECAME EXHAUSTED, SUBMERGED, AND DID NOT RESURFACE.