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.
Inland Electronic Navigational Charts
As of November 2013, Inland ENC data conforming to the Inland ECDIS standard have been produced covering almost 10000 kilometers on European rivers/waterways including the: Rhine, Danube, Mosel, Neckar, Main, Scheldt, Garonne, Elbe, Sava and Drava Rivers and the Main-Danube Canal in Germany, the Netherlands, France, Belgium, Switzerland, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania and the Ukraine.