RedactedNarrative: This is a boating accident on Lake Poinsette in Cocoa where operator operated a 15' vessel in hazardous waters, while underway the engine stalled and due to the loss of power waves began to overtake the vessel filling the vessel up with water. The vessel partially sunk before capsizing. Operator was unable to retrieve a personal flotation device before exiting the vessel into the water. Operator hung onto the capsized vessel for a extended period of time (estimated 6.5 hours) before a Brevard County Sheriffs helicopter located him in the water. The deputies on the helicopter were able to throw a life jacket to Operator. A good samaritan vessel was able to retrieve Operator from the water and transport him to land where a ambulance transported to Wuesthoff hospital where they admitted him for 3 days treating hypothermia and muscle exhaustion. After completing my investigation I have concluded the accident was caused by hazardous waters.