FAA使用多种系统来管理SUA和航管指定空域（ATCAA）以及军用空域和其他训练演习所用空域之外的空域。

The FAA uses a variety of systems to manage SUAs and Air Traffic Control Assigned Airspaces (ATCAAs), airspaces set aside for military and other types of training exercises.

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当时，中国还没有宣布低空开放政策，空域70%都是军管，民用飞机和训练飞机并不能自由地在天空飞行。

At that time, China has not announced low altitude opens policy, airspace 70% it is military control, civil aircraft and train a plane and can not fly freely in the sky.

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