Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Middle marker-en#Sense
Balise médiane-fr#Sense
Haupteinflugzeichen-de#Sense
Ενδιάμεσος ραδιοσημαντήρας-el#Sense
Mellemste markerfyr-da#Sense
Middenmerkbaken-nl#Sense
Middle marker beacon-en#Sense
Marcação intermédia-pt#Sense
Radiofaro di segnalazione intermedio-it#Sense