USCG Chatham receives call of a Vessel on fire with 11 people of board.  USCG responds and rescues all persons.  Harwich Fire dept responds and determines that fire is too dangerous to put out so the vessel is left to burn.  Passengers evaluated.  Vessel sinks in 22 feet of water with light debris and diesel sheen remaining.  This is all the information available on the MISLE CG report