Owned by Sovfracht, they were operated by Tsavliris Russ, a sort of joint venture with Tsavliris Towing & Salvage of Greece/London. There was considerable dispute at one time over ownership of Fotiy Krylov, when the ship was sold to Tsvalirtis by one Russian agency and contested by the Russian government. The tug was renamed Tsavliris Giant , but in the end the Russian government won, the name reverted but continued with the charter arrangement.
The two tugs were in Halifax arrived in Halifax July 26, 2001 towing the drilling rig Eirik Raude from Pascagoula. Since that time the Nikolay Chiker has reverted to Russian naval control, and Fotiy Krylov is on charter to Tsavliris.