9,000 feet AGL in Australia, Singapore, Hong Kong and Vietnam Airspace 2. DO.260B ADS-8 compliance will be mandatory for ALL aircraft operations in United States Airspace in 2020. This solution satisfies both of these requirements Gulfstream Aerospace N120.IE WOQ19-00044 6 02/11/2019 11:16AM GIV 1085 EFTA0080553