Tsakos Energy Navigation Limited announced the charter of its 2008-built 1A ice-class aframax product tanker Propontis to Northern European end-users for two years. This charter is expected to generate $14.5 million of revenue over its duration. In addition, the company announced the completion of the sale to third party interests of its two oldest vessels, the VLCCs La Prudencia and La Madrina, built in 1993 and 1994 respectively.