For as long as a millennium the Slovenians had lived by the sea and dreamed about having their own shipping. The long lasting dream came true only after the WW II. when a little piece of the Adriatic Coast was annexed to the paternal homeland. The merchant navy and corresponding industries like the Faculty of Maritime Studies and the dock services were important creators of the national naval identity. The film Navigare Necesse Est is a compact chronology of the beginnings and rapid development of the Slovenian shipping corporation, intertwined with the memories told by the seamen, who with the right extent of naval knowledge and adventurism bravely sailed over every sea and ocean of the world. The film reveals less known and too soon forgotten parts of the Slovenian history.