RedactedNarrative: On 08/25/18 at approx. 1518 hrs TROOPERS were dispatched to a vessel on fire at Treasure Island on Lake Texoma.  At approx. 1548 hrs. we arrived on scene and observed a White 45 ft. 2004 Sea Ray Sundancer (registered to the operator), on the N. side of Treasure Island that had smoke coming from inside the Cabin area of the Vessel.  Enos Fire department and Boat Tow USA were working on putting the fire out.  The vessel operator was on the vessel at the time of the fire starting and had gotten off the vessel unharmed and was transported to the Mill Creek Marina by the Coast Guard Auxiliary.  I asked some Army Corps of Engineer Rangers to go to the Marina and try to locate vessel 1 operator to get information on the incident and to check on his condition .  The Rangers made contact with the operator and advised that he was ok and that they witnessed no indications of him being under the influence of alcohol other intoxicating substance.  Enos Fire and Boat Tow USA put the fire out completely and Boat Tow USA later towed the vessel to Mill Creek Marina where the vessel was lifted out of the water and placed on dry land.  I spoke with the vessel operator on 08/26/18 and he advised me that he had just anchored at Treasure Island and a friend of his had pulled up along side his vessel and tied off to his vessel.  He stated that he walked down into the cabin of his vessel and immediately detected a strong odor of smoke.  Thinking that the Amps. on his radio was getting hot, he turned off all of the vessel battery switches.   The operator could still see and smell smoke and it looked to be coming from under the deck of the vessel in the cabin so he pulled up a hatch on the deck and observed flames coming from the front thruster compartment area.  The operator then exited the cabin and assisted his friend with moving his vessel away from his and by the time they finished moving his vessel, his vessel was completely engulfed in flames.  He then called for help and stood on the shore of Treasure Island.  I spoke with one of the Tow Boat USA workers who was first on scene and he confirmed that the fire initiated in the Cabin of the Vessel and that the fire was too large for his Fire Extinguisher.