Polish sternwheel paddle steam tug Opole active on the Oder according to a CIA report dated 28 March 1956

An item reported that the Polish Oder Shipping Company possessed the sternwheeler steam tug Opole with a horsepower of 300-350 hp was active on the Oder between Wroclaw and Szczecin and especially used for towing barge convoys from East Germany towards Milowo.

Source
The report was published on www.archive.org, document number CIA-RDP83-00418R003300180001-4