Tsakos Energy Navigation Limited provides marine oil and gas transportation services to national, major, and other oil companies and refiners under long, medium, and short-term charters. As of 2022/4/21, it operated a fleet of 60 conventional tankers, three LNG carriers, and three suezmax DP2 shuttle tankers. Known as MIF Limited until 2001/07, Tsakos Energy Navigation was incorporated in 1993 and is based in Athens, Greece.