RedactedNarrative: On July 26th at 4:00pm a male operating a 2009 Yamaha 11 foot Personal Watercraft off Malibu Beach in Dorchester when he struck a mooring line and his vessel struck 1985 Baltic Yachts 35 foot Auxiliary Sailboat which was unoccupied and moored.  
  
  The male was pronounced deceased at 5:07pm.  Witness stated the operator was travelling fast into the mooring field. 
  
  Cause of accident is operator inattention, inexperience and excess speed.