Tsakos Energy Navigation Limited, together with its subsidiaries, provides seaborne crude oil, petroleum products, and liquefied natural gas transportation services. The company offers marine transportation services for national and independent oil companies and refiners under long, medium, and short-term charters. As of March 31, 2008, it had a fleet of 44 double-hull tankers, which included 3 VLCC tankers, 10 suezmax tankers, 9 aframax tankers, 7 panamax tankers, 6 handymax MR2 product carriers, 8 handysize MR1 product carriers, and 1 liquefied natural gas carrier. The company was founded in 1993 as Maritime Investment Fund Limited and changed its name to MIF Limited in 1996. Further, it changed its name to Tsakos Energy Navigation Limited in 2001. The company is based in Athens, Greece.