相关题目
Aircraft flying at different altitudes under VRF should maintain at least a （ ） m vertical separation between each other.
Because of their high fuel consumption at low levels, （ ） prefer to remain at higher altitudes before starting their descent.
When airports are very busy the approach controller may have to （ ） the aircraft at different levels so that each may descend in turn towards the airport.
The approach controller generally （ ） the control of an arriving aircraft from the area controller and eventually hands over that aircraft to the control tower. For departing aircraft the procedure is reversed.
Aircraft on the same flying track and at the same altitude under VFR should maintain a longitudinal separation of at least （ ） m when cruising above 250km/h.
Aircraft on the same flying track and at the same altitude under VFR should maintain a longitudinal separation of at least （ ） m when cruising at 250km/h or less.
At some busy airports, an Automatic Terminal Information Service (ATIS) is （ ） to pilots of departing and arriving aircraft.
Generally, aircraft flying on the traffic circuit or above flight level 9000m（ ） .
The （ ） provides separation between aircraft arriving and departing, and also controls aircraft and vehicles maneuvering on the maneuvering area.
The control of air traffic on, or in the vicinity of an aerodrome, is provided by （ ） .
