Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Navigation sur lest-fr#Sense
Navigazione a vuoto-it#Sense
Navigazione in zavorra-it#Sense
Ballastfahrt-de#Sense
Navigation à vide-fr#Sense
Ταξίδι δίχως φορτίο-el#Sense
Navegación en lastre-es#Sense
Navigation in ballast-en#Sense
Ballastfart-da#Sense
Ταξίδι υπό έρμα-el#Sense
Leeg varen-nl#Sense
Leerfahrt-de#Sense
Varen in ballast-nl#Sense