RedactedNarrative: UNIT 1 WAS HEADING WEST IN THE BLACK RIVER WHEN THE OPERATOR ATTEMPTED TO TURN RIGHT.  OPERATOR STATED THE STEERING WAS STIFF AND THE BOAT DIDN'T TURN IMMEDIATELY.  THE BOAT MADE A SUDDEN TURN TO THE RIGHT WHERE AND COLLIDED WITH TREES ON THE BANK.  BOTH OCCUPANTS WERE KNOCKED DOWN WITH THE PASSENGER SUFFERING A BACK INJURY.