The Soviet steam tug Ivan Korobov according to a CIA report dated 1949
An item reported that part of the fleet
of the Soviet Ministry of the River Fleet was the steam tug Ivan Korobov
captain Bochkarev of the Moscow Canal Shipping Company, latest identified on 31
August 1948.
Source
The report was published on www.archive.org, document number CIA-RDP83-00415R001700110003-7