RedactedNarrative: The operator and 4 family members were anchored in about 3-4 feet of water in the area at the mouth of back river in the city of hampton. Operator noticed water in the floor of his 20 foot yamaha vessel bearing virginia registration 5223 aw. At that time he turned on the bilge and realized that it was not helping. His son was in the water and verified that the boats plug was in. Once they realized that the vessel was sinking they called 911. 
  
  Hampton fire was first on scene and was able to assist the family back to the fox hill boat ramp. Officer and myself arrived on scene shortly after hampton fire had started to head into the boat ramp. We observed the vessel with almost the whole rear half submerged. After dropping the family off at the fox hill boat ramp, hampton fire and a good samaritan went back out to attempt to recover the vessel and get it back to the ramp. Hampton fire was able to pump enough water out of the partially submerged vessel for the good samaritan to be able to tow the vessel back to the ramp and onto its trailer. Once out of the water we determined that the cause of the leak was a failed scupper plug approximately 1-2" in diameter that was under the water line. This caused the entire engine bay and both inboard engines to be completely submerged under salt water.