Exhibit 10.2

EXECUTION VERSION

AMENDMENT NO. 1 TO

PROMISSORY NOTE

This AMENDMENT NO. 1 TO PROMISSORY NOTE (this “Amendment”) is made and entered
into as of April 10, 2015, by and between Odyssey Marine Enterprises, Ltd., a
Bahamas company (the “Company”), whose address is Lyford Financial Centre,
Lyford Cay, P.O. Box N-7776, Nassau, and Minera del Norte, S.A. de C.V. (the
“Lender”). The Company and the Lender are referred to herein from time to time
collectively as the “Parties”, and each individually, as a “Party”. Capitalized
terms used in this Amendment and not otherwise defined shall have the meanings
ascribed to them in the Note.

WHEREAS, the Parties entered into a Promissory Note, dated as of March 11, 2015
(the “Note”);

WHEREAS, the Parties desire to amend certain terms set forth in the Note;

WHEREAS, pursuant to Section 9 of the Note, the Note may only be modified with
the written consent of the Company and the Holder; and

WHEREAS, the Lender is currently the Holder of the Note.

NOW, THEREFORE, in consideration of the premises, covenants, agreements,
representations and warranties set forth herein, and for other good and valuable
consideration, the Parties to this Amendment, intending to be legally bound,
agree as follows:

 

1. Amendment of Section 2(a) of the Note. Section 2(a) of the Note is hereby
deleted in its entirety and replaced with the following provision:

“(a) Unless otherwise converted as provided herein, the Adjusted Principal
Balance will be due and payable in full on (i) September 30, 2015, (ii) if and
only if the Investor shall have terminated the Stock Purchase Agreement pursuant
to Section 8.1(d)(iii) thereof, March 30, 2016 or (iii) if and only if the
Investor shall have terminated the Stock Purchase Agreement pursuant to
Section 8.1(d)(v) thereof, on the date of such termination (the “Maturity
Date”).”

 

2. Full Force and Effect. From and after the date hereof, all references in the
Note to “this Note,” “hereof” or words of similar import shall mean the Note as
amended by this Amendment. Except as expressly set forth herein, the Note shall
remain in full force and effect on the terms and conditions set forth therein.

 

3. Miscellaneous. All terms and provisions contained in Section 7 through
Section 19 of the Note, including all related definitions, are incorporated
herein by reference to the same extent as if expressly set forth herein.

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IN WITNESS WHEREOF, the Parties have caused this Amendment to be executed as of
the date first above written.

 

ODYSSEY MARINE ENTERPRISES, LTD. By:

/s/ Mark D. Gordon

Name: Mark D. Gordon Title: Vice President MINERA DEL NORTE S.A. DE C.V. By:

/s/ Alonso Ancira Elizondo

Name: Alonso Ancira Elizondo Title: Authorized Person

 

[Signature Page to Amendment No. 1 to Promissory Note]