Upper Information Region
In aviation, an upper information region (UIR) is a flight information region in upper airspace.
In France
The French upper information region extends from FL 195 to unlimited. It is in class C airspace from FL 195 to FL 660. It is in class G airspace from FL 660 to unlimited.[1]
See also
- Area Control Center (list)
- Airway (aviation)
- Air corridor
- Control area
- Control zone
- Terminal control area