Russian tug Rostov active on the Danube according to a CIA report dated 17 May 1948

An item dealing with the Russian merchant fleet active on the Rumanian part of the river Danube mentioned the Russian tug Rostov with a displacement of 50 tons and 350hp engines and active between Turnu Severin and Braila.

Source
The report was published on www.archive.org, document number CIA-RDP82-00457R001500460010-8.