RedactedNarrative: Vessel "No Regrets" reported on fire at Nelson BoatYard Inc.  Local resident reported hearing a small explosion then seeing smoke.  Marina owner was notified and responded to location.  The owner got on a small skiff and towed the burning vessel away from the marina to a location where the fire departments could extinguish the fire.  No one was on board the vessel.  Cause of explosion under investigation.  Vessel and all belongings a total loss.  Some heat damage to vessels moored next to this vessel in marina.  Vessel "Priority" had heat damage to fiberglass bridge, windows and isinglass on port side.  Sailing vessel "Reliant" moored on opposite side had three windows, dingy and bimini top damaged by heat. The marina sustained plumbing, electrical, and dock damage.