RedactedNarrative: Park service Officer dispatched to a boat fire on west end of Horn Island and Saw a tan colored vessel engulfed in flames.  Three people was rescued from the water by another boat close by.  One passenger had minor burn on his left leg and an abrasion on his forehead, but refused medical treatment.
  
  Operator stated as he throttled down the boat to clutch speed in order to approach the island, he Heard a loud explosion.  Then he and the passengers jumped overboard.  Operator stated he did not receive Any notice of problems before explosion.   Boat burned and sank.  Vessel was a total loss.  Approximately $10,000.