RedactedNarrative: Vessel 1 was on plane and struck a large wake while in a sharp turn, Vessel 1's stern slammed the water and immediately took on water ejecting all occupants. Vessel 1 then began to sink and all occupants were picked up by another vessel. Area of the incident was approximately 1.25 miles North of Grasshopper Boat Ramp and approximately 3.5 miles east of US-259 Highway.  Injured parties were treated and released from the McCurtain Co. Memorial Hospital.