 <unk> competitions take place for both powered aircraft and gliders , with up to 30 events each year in the UK and Ireland . Starting at the <unk> level , pilots can move up to Standard ( powered aircraft ) or Sports ( glider ) levels , and then on to Intermediate , Advanced , and finally Unlimited classes . Each step up requires a wider repertoire of <unk> figures and progressively more performance from the aircraft . National championships are awarded annually at Standard / Sports , Intermediate , Advanced ( powered aircraft only ) , and Unlimited levels , and pilots who have reached Advanced and Unlimited levels are eligible for selection to represent the UK in international competition . 
