Uncontrolled airspace

Uncontrolled airspace is airspace where an Air Traffic Control (ATC) service is not deemed necessary or cannot be provided for practical reasons. According to the airspace classes set by ICAO both class F and class G airspace are uncontrolled. It is the opposite of controlled airspace.

单词	Uncontrolled airspace
释义	Uncontrolled airspace 英语百科 Uncontrolled airspace Uncontrolled airspace is airspace where an Air Traffic Control (ATC) service is not deemed necessary or cannot be provided for practical reasons. According to the airspace classes set by ICAO both class F and class G airspace are uncontrolled. It is the opposite of controlled airspace.
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