 Aerobatic competitions take place for both powered aircraft and gliders , with up to 30 events each year in the UK and Ireland . Starting at the Beginner 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 aerobatic 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 . 
 Aerobatic competitions take place for both powered aircraft and gliders , with up to 30 events each year in the UK and Ireland . Starting at the Beginner 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 <a href='uninflect' title='1'><mark>requires</mark></a> a wider repertoire of aerobatic 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 <a href='null_relcl' title='2'><mark>who</mark></a><a href='been_done' title='3'><mark>have</mark></a> reached Advanced and Unlimited levels <a href='drop_aux' title='4'><mark>are</mark></a>eligible for selection to represent the UK in international competition . 
Aerobatic competitions take place for both powered aircraft and gliders , with up to 30 events each year in the UK and Ireland . Starting at da Beginner 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 require a wider repertoire of aerobatic figures and progressively more performance from tdaaircraft . National championships r awarded annually at Standard / Sports , Intermediate , Advanced ( powered aircraft only ) , and Unlimited levels , and pilots done reached Advanced and Unlimited levels eligible for selection to represent the UK in international competition .