UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549





FORM 20-F/A

Amendment No. 1







| ̈ |  | REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934
|- |  | ------------------------------------------------------------------------------------------------

OR



|x |  | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- |  | ------------------------------------------------------------------------------------

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2009

OR



| ̈ |  | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- |  | ----------------------------------------------------------------------------------------

OR



| ̈ |  | SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- |  | -------------------------------------------------------------------------------------------

Date of event requiring this shell company report

For the transition period from         to

Commission file number 001-31236





TSAKOS ENERGY
NAVIGATION LIMITED

(Exact name of Registrant as specified in its charter)





Not Applicable

(Translation of Registrants name into English)

Bermuda

(Jurisdiction of incorporation or organization)

367 Syngrou Avenue

175 64 P. Faliro

Athens, Greece

011-30210-9407710

(Address of principal executive offices)







Paul Durham

367 Syngrou Avenue

175 64 P. Faliro

Athens, Greece

Telephone: 011-30210-9407710

E-mail: ten@tenn.gr

Facsimile: 011-30210-9407716

(Name, Address, Telephone Number, E-mail and Facsimile Number of Company Contact Person)

Securities registered or to be registered pursuant to Section 12(b) of the Act:



|                                         |  |  |  |                                          
|---------------------------------------- |  |  |  | -----------------------------------------
|Title of each class                      |  |  |  | Name of each exchange on which registered
|                                         |  | 
|Common Shares, par value $1.00 per share |  |  |  | New York Stock Exchange                  
|                                         |  | 
|Preferred share purchase rights          |  |  |  | New York Stock Exchange                  

Securities
registered or to be registered pursuant to Section 12(g) of the Act: None

Securities for which there is a reporting obligation
pursuant to Section 15(d) of the Act: None

As of December 31, 2009, there were 36,916,686 shares of the
registrants Common Shares outstanding.

Indicate by check mark if the registrant is a well-known seasoned issuer, as
defined in Rule 405 of the Securities Act.     Yes   ̈    No  x

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934.    Yes   ̈    No  x

Note  Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or
15(d) of the Securities Exchange Act of 1934 from their obligations under those Sections.

Indicate by check mark whether the
registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and
(2) has been subject to such filing requirements for the past 90
days.    Yes  x    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every
Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈     No   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See
definition of accelerated filer and large accelerated filer in Rule 12b-2 of the Exchange Act. (Check one):

Large
accelerated filer   ̈                 Accelerated
filer  x                 Non-accelerated filer   ̈

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this
filing:



|             |  |                                                |  |         
|------------ |  | ---------------------------------------------- |  | --------
|U.S. GAAP  x |  | International Financial Reporting Standards   ̈ |  | Other   ̈

If Other has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to
follow.    Item 17   ̈    Item 18   ̈

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  x









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EXPLANATORY NOTE

This Form 20-F/A of Tsakos Energy Navigation Limited (the Company) is being filed solely to amend Exhibits 13.1 and 13.2 to the Companys Annual Report on Form 20-F for the year ended
December 31, 2009, which was originally filed with the Securities and Exchange Commission on April 9, 2010. As originally filed, Exhibits 13.1 and 13.2 erroneously contained certifications for the period ended December 31, 2008. As
amended herewith, Exhibits 13.1 and 13.2 contain certifications for the period ended December 31, 2009.

Except as described above, this
Amendment No. 1 does not modify or update the disclosure in, or exhibits to, the Form 20-F, as originally filed.



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SIGNATURES

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused
and authorized the undersigned to sign this annual report on its behalf.



TSAKOS ENERGY NAVIGATION LIMITED/S/    NIKOLAS P.
TSAKOSName:

Nikolas P. TsakosTitle:

President and Chief Executive OfficerDate:

October 25, 2010




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EXHIBIT INDEX



|              |  |                                                                                                                                                 
|------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description of Exhibits                                                                                                                         
|              | 
|13.1          |  | Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
|              | 
|13.2          |  | Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002



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