AD reserved for radio-equipped avions. Special activities Aerobatics on AD (NR 6364): piste axis, on a length of 1 km centered on ARP, 2090 ASFC / 2500 AMSL 4500 AMSL (upper limit 4000 ft AMSL during LF-R 146 A activity), SR-SS. Activity known by IROISE INFO. Users' information on A/A PONTIVY FREQ AEM (NR 8953): 500 ft ASFC - SR-SS. As per protocol.