RedactedNarrative: OPERATOR 1 WAS OPERATING VESSEL 1 WHILE NAVIGATING AT NIGHT. AS VESSEL 1 WAS TRAVELING UPSTREAM VESSEL 1 IMPACTED A FIXED OBJECT (STANDING TIMBER) IN THE WATERWAY THAT CAUSED VESSEL 1 TO OVERTURN AND EJECT OPERATOR 1. THE OPERATOR 1 WAS ABLE TO CLIMB BACK ON THE SUBMERGED VESSEL. OPERATOR 1 DID NOT SUSTAIN ANY INJURIES FROM THE COLLISION OR EJECTION FROM VESSEL 1. VESSEL 1 DID SUSTAIN EXTENSIVE DAMAGE FROM THE IMPACT WITH THE FIXED OBJECT (STANDING TIMBER).