V1 WAS HEADED SOUTH BOUND AND V2 WAS HEADED NORTH BOUND APPROACHING A BLIND CURVE IN THE RIVER. V1 ALTERED HIS SPEED TO A STOP WHEN HE HEARD V2 APPROACHING. V2 APPROACHED V1 PROCEEDING AROUND THE BLIND CURVE, AND BECAUSE OF HIS SPEED WAS NOT ABLE TO TAKE EVASIVE ACTION TO AVOID A COLLISION. V2 STRUCK V1 ON THE STARBOARD SIDE NEAR THE STEERING WHEEL. V2 CAME TO REST ON TOP OF V1'S OPERATOR SEAT AND MOTOR COWLING.