RT Journal Article SR Electronic A1 Žarnay, Pavel A1 Bednár, Juraj A1 Chalupka, Štefan A1 Moravčík, Jozef T1 JF Doprava a spoje YR 2010 VO 6 IS 1 SP 234 OP 242 UL https://tac.uniza.sk/artkey/das-201001-0027.php AB River informations services (RIS) are harmonised communication and information systems for inland shipping and cargo ship transport in continuity to other transport and forwarding modalities. On Danube and in Slovakia, they are also realised through ship, coast, central and management segments. They provide information about inland waterway and its traffic, port and waterway usage fees, support for navigation management and accident assistance as well as support for statistics, customs services and business inland shipping activities.