Socialist Federal Republic of Yugoslavia
Regarding rivers, the Danube was navigable throughout its entire course in Yugoslavia, linking the ports of Belgrade, Novi Sad, and Vukovar with Central Europe and the Black sea. Long stretches of rivers Sava, Drava and Tisza were also navigable.
Danube Commission (1948)
When the treaty was adopted, Yugoslavia had already been expelled from the Cominform, the political grouping of all the Communist parties in the Soviet bloc. Yet it still voted down the line with the other non-Western countries, nearly 200 miles of the Danube flowing through its territory and the only navigable channel through the Iron Gate being on the Yugoslav side of the Romanian border. Nevertheless, when the new commission organized its staff, the Yugoslavs were offered only four minor posts out of sixty permanent appointments. The Josip Broz Tito government refused them all.