The shipyard’s large facility requires a maintenance group to service heating, ventilation and air conditioning units. Heating and air conditioning apprentices learn to install, repair and maintain a wide variety of systems throughout the shipyard. These systems include water fountains, window air conditioners, heating units, air driers, chilled water systems, and 3 to 60-ton air conditioning systems. Apprentices also perform routine preventative maintenance on all systems to ensure they function properly. Heating and air apprentices will take detailed theory courses to prepare them for the field.