RedactedNarrative: On the listed date and time, the listed vessel, while in the Gulf of Mexico, starting taking on water by unknown means. Water intrusion continued until the vessel's buoyancy failed and vessel capsized.  This caused the listed occupants to enter the water. 
  On the listed date and time, listed owner and occupant launched the listed vessel from Punta Rassa boat ramp. Owner stated this was his first voyage as owner of the vessel. Owner/operator and his father, the listed occupant, left the A-Span area and headed south into the Gulf of Mexico. Owner stated the two noticed water entering into the vessel from unknown means and collecting near the stern. Owner advised this was between the Sanibel lighthouse and Fort Myers Beach they turned the vessel around with intent on making their way back to the ramp. Shortly after making the turn, the stern of the vessel dropped further into the water as same continued taking on water. Seawater started coming over the aft gunwale, the vessel quickly filled with water forcing the two POBs in the water, capsizing as it sunk. Both subjects advised the vessel capsized so quick after making the turn, they didn't have time to don PFDs. The two subjects were treading water near the overturned vessel for approximately 5 minutes until an unknown good Samaritan in a small dinghy came to their aid. The tide drifted the subjects east towards the Bunche Beach area. Once on shore, the owner made contact with LCSO and advised of the incident.  
  	Upon this officer's arrival, Sea-Tow was in possession of the vessel off Bunche Beach and LCSO was in process of transporting the subjects back to Punta Rassa where said subjects were interviewed by this officer. It should be noted, prior to returning to Punta Rassa, the subjects were cleared medically by LC-EMS while at Bunche Beach.