Polish tug Hercules according to a CIA report dated 20 May 1954

An item reported the Polish tug Hercules with a gross register tonnage of 254 tons, a horsepower of 1.200 hp, built in 1937 and as homeport Gdynia, Poland.

Source
The report was published on www.archive.org, document number CIA-RDP80-00810A004001050003-8