The Soviet steam tug Proletari according to a CIA report dated 21 August 1950

An item reported that the Soviet White Sea Onega Shipping line (Belmorsko-Onezhskoe Parokhodstvo) possessed the steam tug Proletari captain Mukhin, last time identified on 7 March 1950.

Source

The report was published on www.archive.org, document number CIA-RDP83-00415R005700200002-4