The SOSA Gliding Club is one of the oldest and largest clubs in Canada and owns the Rockton Airport (CPT3) which is located one hour west of Toronto. The club owns 10 gliders and three tow planes including Piper PA-25-235, C-GXWI, which was imported in 1978 and used for crop spraying in Alberta and Ontario before acquired by SOSA in September 2018.