VESSEL 1 WAS APPROACHING AN AREA OF RAPIDS AT A BEND IN THE KIAMICHI RIVER.  A LARGE TREE BLOCKED THE DEEPEST PART OF THE CHANNEL.  VESSEL 1 ATTEMPTED TO NAVIGATE UPSTREAM AND AROUND THE TREE.  THE CURRENT PUSHED VQ DOWNSTREAM AND PINNED ITS PORT SIDE AGAINST THE TREE.  WATER IMMEDIATELY ENTERED VESSEL 1 AS BOTH OPERATOR AND PASSENGER EXITED ONTO THE TREE.  VESSEL 1 CAPSIZED AND SUBMERGED SOON AFTER.  THEY WERE ABLE TO MAKE IT TO the WEST BANK AND WALK BACK TO THEIR VEHICLE.  VESSEL IS STILL SUMBERGED AND UNRECOVERED.  AREA OF ACCIDENT WAS APPROX 80 FT EAST OF THE WEST BANK AND APPROX 150 FT WEST OF THE EAST BANK AND APPROX 150 FT NORTH OF THE SOUTH BANK OF THE KIAMICHI RIVER.
FT TOWSON                     