The soviet tanker
An item referred apparently to an account of sailor who passed with his ship several harbours on the Romanian part of the Lower Danube. He stated that while underway towards Reni he sighted on the 35th mile the Turkish merchant ship Ismit berthed with alongside a control motor boat. Underway was a Soviet tug and dark gray painted tanker passed destined towards Reni.
Source
The report was published on www.archive.org, document number CIA-RDP80-00810A007800110004-3