Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Equipement de balisage des obstacles a la navigation arienne-fr#Sense
Obstakelverlichting-nl#Sense
Hindernisbefeuerung-de#Sense
Feu d'obstacle-fr#Sense
Belysning af forhindringer-da#Sense
Obstruction lighting-en#Sense
Segnalazione degli ostacoli-it#Sense
Air obstruction lighting equipment-en#Sense