RedactedNarrative: A fire started on Vessel 1, Kinns Katch II, near the shore power connection on the boat.  An electric heater on board may be the source based on witness statements.  Vessel 1 was docked on A Dock, Slip 7.  The fire was discovered in an individual checking on his boat.  Video surveillance of the marina showed that the fire spread to the Vessels 2, 4 and 5 within 8 minutes.  Vessel 1 and Vessel 3 burned through their mooring lines and drifted over the B Dock, which caused fire damage to Vessel 6 and Vessel 7.