RedactedNarrative: WHILE MOTORING UPSTREAM V1'S MOTOR STRUCK A SUBMERGED LOG CAUSING THE MOTOR TO KICK UP AND THE LOWER UNIT TO COME OUT OF THE WATER.  THE OPERATOR LOST CONTROL OF V1 AND IT STRUCK THE STEEP BANK. V1 THEN SLID BACK INTO THE WATER AND BEGAN TO FLOOD AND SUBSEQUENTLY SANK.  THE OPERATOR WAS ABLE TO SAFELY SWIM TO THE BANK.