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"Air-ground communication" is considered to be…

  • A
    One-way communication from stations or locations on the surface of the earth.
  • B
    Two-way communication between aircraft and stations or locations on the surface of the earth.
  • C
    One-way communication from aircraft to stations or locations on the surface of the earth.
  • D
    A method in which telecommunications between two stations can take place in both directions simultaneously.

ICAO Annex 10
1.3 Communication Methods

Air-ground communication. Two-way communication between aircraft and stations or locations on the surface of the Earth.

Air-to-ground communication. One-way communication from aircraft to stations or locations on the surface of the Earth.

Note: Be careful with this question. The only difference is "to". If "to" => One-way. If not => Two-way.

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