RedactedNarrative: Operator reported that he struck a submerged object in Lake Pontchartrain as he returned home from fishing. Shortly after the incident his vessel began to take on water. As Operator attempted to limp back to shore, he began taking waves over the stern of the vessel causing it to become submerged. As the vessel began to drift away from the shore and to the east, Operator made the decision to swim to shore. Operator reported that he was wearing a PFD and kill switch at the time of the incident. A USCG Helo recovered Operator from the rock jetties near Lakeshore Estates in Slidell and transported him to University Medical Center where he was determined to be uninjured. The vessel drifted against rocks and a pier where it sustained major damage. The investigator was unable to determine the damage caused by the submerged object. The submerged object could not be located.  Alcohol or drugs do not appear to be a contributing factor.