Tsakos Energy Navigation Ltd was incorporated in 1993 as an exempted company under the laws of Bermuda under the name Maritime Investment Fund Limited. In 1996, Maritime Investment Fund Limited was renamed MIF Limited. The Company is a provider of international seaborne crude oil and petroleum product transportation services. As of April 10, 2014, it operated a fleet of 45 modern petroleum product tankers and crude oil carriers that provide marine transportation services for national, major and other oil companies and refiners under long, medium and short-term charters. Its fleet also includes one 2007-built Liquefied Natural Gas carrier and two 2013-built shuttle suezmax tankers with advanced dynamic positioning technology, bringing the total operating fleet to 48 vessels. Its fleet is managed by Tsakos Energy Management Limited, or Tsakos Energy Management. The Company continues to provide commercial management services for its vessels, which include chartering, charterer relations, obtaining insurance and vessel sale and purchase, supervising new building construction and vessel financing. Its fleet's technical management, including crewing, maintenance and repair, and voyage operations, has been subcontracted by Tsakos Energy Management to Tsakos Columbia Shipmanagement. Tsakos Energy Management also engages Tsakos Shipping to arrange chartering of its vessels, provide sales and purchase brokerage services, procure vessel insurance and arrange bank financing. Its customers include: Petrobras, BP, ExxonMobil, Flopec, Hyundai Merchant Marine, BG, ST Shipping, Shell and Lukoil. Currently, it competes with owners of tankers in the ULCCs, VLCCs, suezmax, suezmax shuttle tankers, aframax, panamax, handymax and handysize class sizes, and also compete with owners of LNG carriers. The Company's business and the operation of its vessels are materially affected by government regulation in the form of international conventions and national, state and local laws and regulations in force in the jurisdictions in which vessels operate.