RedactedNarrative: Vessel 1 took on 35 gallons of gasoline at the dock. The operator ran the blower for 3 to 5 minutes. The operator started the engine and heard a loud boom. Smoke was observed in the engine room and the fire extinguishers were not able to contain the fire. The operator and passenger left the vessel. 
  
  Vessel 1 was untied from the dock and set free. Vessel 1 drifted East towards the north section of harbor point dock. Vessel 1 drifted into vessel 2. vessel 2 caught on fire. Vessel 1 drifted into vessel 3. Vessel 3 caught on fire. The fire then spread from vessel 3 to vessel 4, then vessel 4 to vessel 5. Vessel 6 sustained smoke damage and the dock sustained fire damage. Vessel 1, 2 & 3 drifted away from the north section into the channel and then drifted south. The south section of the dock was damaged. The north section of the Ponus Yacht Club was damaged by fire. Vessel 7 was moored at Ponus Yacht Club and sustained smoke damage.  
  
  Vessel 1 submerged at the south section of Harbor Pt dock due to water from the fire fighting efforts. While still on fire, vessel 2 was towed to the north section of harbor pt dock and the fire was extinguished. Vessel 3 partially submerged at the south section of harbor point dock with extensive fire damage. Vessel 4 was moored at the dock with extensive fire damage and vessel 5 was also moored at the north section of the harbor point dock with extensive fire damage. There were no occupants on the vessels. No injuries. Unknown cause of the ignition of fuel.