RedactedNarrative: Operator 1 stated he launched his 1976 17ft HydraSport at the Ft Pike public Boat launch in New Orleans on Saturday May 23rd at approximately 7:30a.m. Operator 1 along with his cousin fished a few spots in Lake Borgne and the Hwy 11 train trestles before deciding to return to the dock at around 3:30pm. As Operator 1 attempted to get the vessel on plane, he noticed the boat seemed to be taking on water. Operator 1's cousin opened a hatch and observed an alarming amount of water in the bilge of the vessel. At this time, Operator 1's cousin opened a hatch and observed an alarming amount of water in the bilge of the vessel. At this time Operator 1 turned the boat towards the shoreline in hopes he could run it up on the bank, but Operator 1 stated that he was unsuccessful in his attempt and the vessel became completely submerged. Operator 1 and his passenger swam to shore and called his wife to come pick them up. Operator 1 stated that he assumed the boat was a total loss and was sitting on the bottom of the lake, he did not report the incident to any LE agency. No injuries were reported, and alcohol cannot be determined to be a factor. PFD's were reported to be present but no worn. On Sunday May 31, 2020 Sgt. received a call from LDWF dispatch stating an unattended vessel was observed by a member of the public floating along the shoreline in Lake Pontchartrain near Oak Harbor. Sgt. was able to track down the subject that owned the vessel and identified him as Operator 1. Operator 1 stated that he sank his vessel during a fishing trip a week prior and did not report the incident. Sgt. instructed him to retrieve the vessel from the water and complete the Operators Boat Incident Report given to him on 05-31-20. Operator 1 was able to recover the vessel and completed his Operator Report. Upon completion of the investigation Sgt. was unable to determine a cause of the accident. The recovered vessel was a complete loss with extensive hull damage mostly caused from wave action slamming the vessel into the concrete shoreline of Lake Pontchartrain.