RedactedNarrative: V1 was recreationally crusing in the Gulf of Mexico in attempts to go fishing offshore of Sanibel. The twin engine vessel had a loss of power of both engines and began taking on water through an uncovered swim platform access hatch. The vessel capsized due to the swamping event.   
  The vessel was recovered by Sea Tow and brought into Punta Rassa boat ramp. An inspection of the vessel revealed a missing access hatch plate on the swim platform where the vessel occupants stated the water was entering the hull. The opening on the swim platform combined with a total loss of power in rough sea conditions was determined to be the cause of the capsizing.