The Bulgarian tug Svisetov according to a CIA report dated 8 September 1950

An item reported that the Bulgarian shipping company Bulgarian River Navigation (BRP) at Ruse possessed the tug Svisetov with a tonnage of 2.000 ton, a crew numbering 35 men and 1.500hp diesel engines. Tow capacity 4-6 barges upstream the river as far as Vienna, Austria of the water level allows this. Own load capacity of 400 tons. Built at Regensburg, Germany in 1941.

Source
The report was published on www.archive.org, document number CIA-RDP82-00039R000100080032-8