Once your plane takes off, your pilot activates a transponder device inside the aircraft.
Once your plane takes off, your pilot activates a transponder device inside the aircraft.
飞机离开地面后，飞行员会开启机内的自动异频雷达收发机。
Once your plane takes off, your pilot activates a transponder device inside the aircraft.
飞机离开地面后，飞行员会开启机内的自动异频雷达收发机。