相关题目
By measuring his radials from （ ） VOR station, a pilot can check his position.
VOR and DME operate on （ ） and as a consequence, are not affected by static or other interferences.
An aircraft can fly on automatically （ ） .
An alternate aerodrome is filed on a （ ） .
VHF is （ ） .
When aircraft depart at specified times, they are separated （ ） .
On a flight progress strip, a controller （ ） only current flight data.
Vertical separation is obtained by assigning different （ ） to aircraft, in other words, they are separated by a specified vertical distance.
The code range under SSR Mode A interrogation and response is （ ） .
Two aircraft taxiing on the ground, if the wake turbulence of the preceding aircraft is medium, the succeeding aircraft should keep a minimum distance of （ ） m from it.
