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

An item reported that the Polish Oder Shipping Company possessed the steam tug Msciwojo captain Prost with a horsepower of 250hp only serving in the harbour of Szcezin.

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