RedactedNarrative: On 05 December 2015 at approximately 2000 hours, a house boat was travelling south at approximately 5 miles per hour (1000 rpm) and ran aground next to a rock buoy located off Big Boulder Island. During the time of the incident, the annual parade of lights was in progress within 1/2 mile of the accident location. The operator/owner said he was at the helm with one lookout next to him looking out the helm door and another lookout was on the bow. According to the owner both lookouts were experienced. No injuries. The vessel took on water overnight and the following day was found partially submerged.