RedactedNarrative: On the above date and time operator was out driving his family in his boat around Percy Priest Lake. The wind was very strong that day and the water was rough. He started to get close to an island so he put the vessel in reverse. When he placed the vessel in reverse and sped-up, multiple waves came over the stern of the boat. The boat took on so much water that it lost its buoyancy quickly. All of the individuals left the boat voluntarily and swam to the island that was nearby. There were no injuries. operator had just paid $2500 for the engine and he felt the engine would be ruined now that it had been flooded with water. My conclusion is that the accident was caused by rough water conditions that day and also operator inexperience.