RedactedNarrative: Victim was a passenger on vessel one (a single person kayak). The kayak was approx 75 meters from the shoreline when the kayak capsized for unknown reason ejecting the operator and passenger into the water. The passenger began to panic. Operator attempted to help the passenger but was unable to do so. The passenger went under the water and did not resurface and drowned in approx 65 feet of water. The operator was able to swim to the shoreline. Ohp was able to locate the victim by using side scan sonar. The victim was recovered by divers. Area of the accident was approx 75 meters west of the east shoreline and approx 250 yards northwest of the boat ramp. The vessel is owned by the us army recreation services and had been rented by the operator. Information for completion of this report provided by us army at ft sill.  Victim had been drinking.