RedactedNarrative: UNKNOWN OPERATOR OF VESSEL 1 HAD OPERATED VESSEL 1 TO A BEACH AND STOPPED VESSEL 1. AS ALL OF THE OCCUPANTS ON VESSEL WERE SITTING AND VESSEL 1 WAS DRIFTING IN THE WATERWAY PASSENGER 3 STOOD UP WHICH CAUSED THEM TO SLIP AND FALL. PASSENGER 3 SUSTAINED INJURY FROM THE IMPACT WITH INTERIOR OF VESSEL 1. NONE OF THE OTHER OCCUPANTS ON VESSEL 1 SUSTAINED AND INJURIES. THERE WAS NO DAMAGE TO VESSEL 1.