The Romanian Navrom motor tug Citus active on the Danube according to a CIA report dated 10 June 1955

An item dealing with the Danube shipping movements reported that on 24 February 1955 was sighted on the position DKM 1863 the Romanian Navrom tug ms Citus while towing tankers loaded with kerosene upstream towards Bratislava.

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