The Grob G103A Twin II Acro, known by the RAF as the Viking T1, is used by the Air Cadet Organisation to give basic gliding training to air cadets. The aircraft is currently used by 11 Volunteer Gliding Squadrons located at various sites around the UK. Their role is to train air cadets to a standard that will allow them to fly solo. Courses available to the air cadets are the gliding induction course, the gliding scholarship course and the advanced gliding training course. The aircraft is again also used at the Air Cadet Central Gliding School, at Syerston, where it is used in the training of the VGS instructors.
The Viking T1 is a high performance sailplane, which can be winch-launched or aero-towed. The aircraft is fitted with a non-retractable tandem undercarriage and upper surface airbrakes. It has tandem seating for a crew of two and is constructed using the latest techniques in industrial glass-reinforced plastic for light weight and strength. The Viking is used for basic training, high-performance flying and simple aerobatic flying and is a cost-effective, modern glider, ideally suited to its training role with the Air Cadet Organisation.