Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Deep sea navigation-en#Sense
Grote vaart-nl#Sense
Navigazione alturiera-it#Sense
Oceangående fart-da#Sense
Ναυσιπλοϊα ανοικτής θαλάσσης-el#Sense
Navigation hauturière-fr#Sense
Seeschiffahrt-de#Sense
Navegación de altura-es#Sense