Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Air traffic control unit-en#Sense
Direzione del traffico aereo-it#Sense
Organe du contrôle de la circulation aérienne-fr#Sense
Flugverkehrsleitstelle-de#Sense
Organo del controllo della circolazione aerea-it#Sense