RedactedNarrative: The Operator launched Vessel 1 and engaged the engine, putting it in reverse.  The Operator reported that Vessel 1 was approximately 20 feet from the ramp when there was a popping sound from the engine compartment and then an explosion took place.  The Operator reported that there were flames coming from the engine compartment, and that he was unable to get to the fire extinguisher.  The Operator jumped into the water and swam to shore without injury.  The vessel sank shortly after as fire consumed Vessel 1.