Czechoslovakian motor tug Opava according to a CIA report dated 30 July 1951

An item reported that the Czechoslovak Elbe Navigation Company, Prague, Czechoslovakia operated the motor tug Opava with a crew numbering 7 men, fitted out with diesel engines, a tonnage of 3.500 tons and a draught of 0,9 metres.

Source
The report was published on www.archive.org, document number CIA-RDP82-00457R008200260013-3