RedactedNarrative: Vessel 1 was adrift with passengers swimming.  Victim attempted to get back onto vessel 1 using vessel 1 ladder on swim deck when the ladder broke causing the victim to strike her left arm onto the swim deck of vessel 1, breaking the victims left arm.  Victim was transported to the Buncomb Creek Marina where she was met by Marshall County EMS and transported to Alliance Hospital in Durant for treatment. Area of the accident was approx .25 miles west of the east edge of Lake Texoma at Buncomb Creek and approx .25 miles east of the west edge of Lake Texoma and approx 1 mile se of the Buncomb Cree Marina gas dock.