The Port of Szczecin in Polish generally Port Szczecin is a Polish seaport and deep water harbour in Szczecin, Poland located at Oder River and the Regalica river in Lower Oder River Valley, off the Szczecin Lagoon. The port has Port Free Zone and shipyard. The Port of Szczecin and the Port of Świnoujście are managed by one authority. Both ports creates one of the largest port complexes at the Baltic Sea. In 2006, cargo traffic in the seaport was equaled 9,965,000 tons, and it comprised 16.5% of all cargo traffic in Polish seaports. In 2007, to the port entered 2895 ships of gross tonnage more than 100.