Donau-Schwarzmeer-Kanal
Constanța Port is both a maritime and a river port. Daily, more than 200 river vessels are in the port for cargo loading or unloading or waiting to be operated. The connection of the port with the Danube river is made through the Danube–Black Sea Canal, which represents one of the main strengths of Constanța Port. Important cargo quantities are carried by river, between Constanta and Central and Eastern European countries: Bulgaria, Serbia, Hungary, Austria, Slovakia and Germany. River traffic is very important for the Constanța Port, having a share of 23.3% of the total traffic in 2005, when 8,800 river vessels called to the port.