RedactedNarrative: 11 ft airboat with 4 occupants was traveling back to the boat ramp, from their camp, when vessel struck a dry patch of land and was forced off the trail into high grass causing the vessel to roll over on its side. The occupants jumped from the vessel as it was rolling over. One occupant was unable to get away from the vessel far enough as the gunnel rolled on top of her left leg, below the knee causing it to break. The injured occupant was transported to the hospital. Injured occupant was the third person in a seat designed for two and was sitting in a position with legs hanging over the side of the seat, this may have contributed to the occupant's inability to jump clear of the airboat.