When the takeoff/landing facility management device 4 receives the landing request from the unmanned aerial vehicle 1 requesting the emergency landing, it transmits the information request of the unmanned aerial vehicle 1 to the unmanned aerial vehicle operation management device 3, and the unmanned aerial vehicle operation management device 3 performs the emergency landing. When the unmanned aerial vehicle 1 to be sought is in an emergency state, at least the position information of the unmanned aerial vehicle 1 is transmitted to the takeoff/landing facility management device 4 in response to the information request.
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