Tsakos Energy Navigation Ltd. (TEN) plans to offer its common shares in a public offering. The Company says it plans to use the net proceeds of the offering to finance the growth and modernization of its fleet, and for general corporate purposes. Entities affiliated with the Tsakos Holdings Foundation, which is the Company’s largest shareholder, have indicated their intention to purchase 500,000 of the common shares sold in the offering. The Company intends to grant the underwriters…