Massachusetts Association of Independent Scuba Instructors was established in 2013.  We are located in the Metrowest part of Massachusetts 32 miles southwest of Boston.  MAISI, LLC is a NAUI Pro-Gold scuba diving training facility & retail establishment with a Class-E certified Air/Nitrox station.  MAISI, LLC specializes in scuba diving training from Introduction to Scuba through Instructor including public safety diving.  MAISI, LLC employs certified, insured Instructors and Dive Masters.  Our facilities house a training room, office, in-ground pool, air compressor & fill station, tank inspection station, and retail sales area.  We also perform routine maintenance and repair on all major brands of tanks, valves, regulators and BC’s.  Our training classes are kept small for more direct, one-on-one training. Our open water check-out dives are performed at Ft. Wetherill RI, Wallum Lake, Webster Lake, Cape Ann, and Rockport, MA. We are a proud business partner and member of DAN (Diver’s Alert Network) and are certified to teach all the Dan Safety programs.