Electronic Navigation Charts (ENC) presents one of the River Information Services (RIS). Holders of the RIS development in the Republic of Serbia and Republic of Croatia (whereby, on the Sava River) are the Directorate for inland waterways from Belgrade – Plovput and the Agency for inland waterways from Vukovar, respectively, while in Bosnia and Herzegovina has no experience with regard to the RIS. Since no commercial navigation on the Sava River is taking place in Slovenia, the RIS hasn’t been developed there.