 These units are co-located with Air Experience Flights, which share the same aircraft and facilities and provide air experience flying to the Air Training Corps and CCF.The Volunteer Gliding Squadrons also provide air experience flying to cadets using the Grob Viking T1 conventional glider.Due to an airworthiness issue in April 2014, the Viking fleet and the Grob Vigilant T1 aircraft were grounded for a two-year period, although Viking operations have subsequently resumed.