RedactedNarrative: OPERATOR 1 WAS BEGINNING TO RESTART VESSEL 1 WHEN OPERATOR 1 TURNED ON THE IGNITION KEY THEY HEARD A LOUD POP NOISE UNDERNEATH THE GLOVE BOX ON THE PASSENGER SIDE OF VESSEL 1. OPERATOR 1 NOTICED VESSEL IMMEDIATELY STARED SMOKING FROM THE AREA WHERE THE NOISE CAME FROM. THE FIRE SPREAD VERY QUICKLY TOWARDS THE STERN OF THE VESSEL. THE FIRE EXTINGUISHER WAS USED, BUT WAS UNSUCCESSFUL IN PUTTING THE FIRE OUT. VESSEL 1 BURNED ALL THE WAY DOWN TO THE WATERLINE. NONE OF THE OCCUPANTS ON VESSEL 1 SUSTAINED ANY INJURIES. VESSEL 1 WAS A TOTAL LOSS.