The Hungarian Mahart steam tug Szoltan active on the Danube according to a CIA report dated 29 June 1955

An item dated 13 May 1955 reported the Hungarian Mahart (Magyar Hajozasi Reszvenytarsasag) steam tug Szoltan on the Danube off Szob while towing tankers loaded with diesel fuel downstream.

Source
The report was published on www.archive.org, document number CIA-RDP80-00810A007200560007-7