The Soviet DDSG motor tug Kranzegg active on the Danube according to a CIA report dated 10 June 1955

An item dealing with the Danube shipping movements reported that on 19 February 1955 was sighted on the position DKM 1863 the first DDSG (Sowjetische Donau Dampf-Schiffahrts GesellschaftmbH) tug ms Kranzegg towing with naphtha loaded tankers from Giurgiu, Romania and an empty barge upstream.

Source
The report was published on www.archive.org, document number CIA-RDP80-00810A007000090002-6