EXHIBIT 10 THIRD AMENDMENT TO SECOND AMENDED AND RESTATED LOAN AGREEMENT THIS THIRD AMENDMENT TO SECOND AMENDED AND RESTATED LOAN AGREEMENT, dated as of February 11, 1998 (this "Amendment"), between AMERICAN OILFIELD DIVERS, INC., a Louisiana corporation ("Borrower") and FIRST NATIONAL BANK OF COMMERCE, a national banking association ("Lender"). W I T N E S S E T H: WHEREAS, Borrower and Lender have heretofore entered into a Second Amended and Restated Loan Agreement dated as of April 3, 1996, as heretofore amended by that certain First Amendment thereto between Borrower and Lender dated as of March 28, 1997, and by that certain Second Amendment thereto between Borrower and Lender dated as of June 12, 1997 (as so amended, the "Loan Agreement"), pursuant to which Lender agreed to provide Borrower with certain credit facilities consisting of a revolving line of credit, a commitment for the issuance of letters of credit, and a term loan under the terms and conditions more fully described therein; and, WHEREAS, Borrower has requested that Lender increase its commitment to make Revolving Loans and to issue Credits pursuant to the terms of the Loan Agreement to an aggregate amount not to exceed $25,000,000.00 at any time, and Lender has agreed to so increase its commitment subject to the terms and conditions of the Amendment. NOW, THEREFORE, the parties hereto, in consideration of the mutual covenants hereinafter set forth and intending to be legally bound hereby, agree as follows: 1. Defined Terms. Capitalized terms used herein which are defined in the Loan Agreement are used herein with such defined meanings unless otherwise defined herein. 2. Amendments to Loan Agreement. (a) Contemporaneously herewith, Borrower has executed and delivered to Lender that certain promissory note made by Borrower dated February 11, 1998, payable to the order of Lender in the principal sum of Twenty-Five Million and No/100 ($25,000,000.00) Dollars, which note has been given in renewal and extension, but not as a novation, of that certain promissory note made by Borrower dated April 3, 1996, payable to the order of Lender in the principal sum of $15,000,000.00, as said promissory note was heretofore amended by the First and Second Amendments to the Loan Agreement dated as of March 28, 1997, and June 12, 1997, respectively. Accordingly, the definition of the term "Revolving Note" in Article I of the Loan Agreement is hereby amended to read as follows: (49) "Revolving Note" shall mean that certain promissory note made by Borrower dated February 11, 1998, payable to the order of Lender in the principal sum of $25,000,000.00, which evidences the Revolving Loans made pursuant to the terms hereof, together with any and all promissory notes given in renewal, extension and modification thereof. All references in the Loan Agreement to the term "Revolving Note" shall henceforth refer to such note as defined in this Amendment. (b) The definition of the term "Ship Mortgages" in Article I of the Loan Agreement is hereby amended to read as follows: (52) "Ship Mortgages" shall mean, collectively, collectively, (i) that certain Preferred Mortgage by S & H Diving Corporation (predecessor to S & H) in favor of Lender dated August 9, 1994, (ii) that certain Fleet Preferred Mortgage by APM in favor of Lender dated September 22, 1994, (iii) that certain Preferred Mortgage by Borrower in favor of Lender dated September 22, 1994, (iv) that certain Preferred Mortgage by S & H Diving Corporation (predecessor to S & H) in favor of Lender dated April 3, 1995, and (v) that certain Preferred Mortgage by S & H in favor of Lender dated May 13, 1996, as each of said instruments have been amended or may be amended from time to time. The term "Ship Mortgages" shall also include any additional preferred ship mortgages now existing or hereafter from time to time granted by any Grantor affecting any and all Coast Guard documented vessels as security for any indebtedness of Borrower to Lender. (c) All references in Articles II and VI of the Loan Agreement to the dollar amount of "$15,000,000.00" are hereby deleted and replaced with references to the dollar amount of "$25,000,000.00". (d) The last sentence of Article VI, Section (a) of the Loan Agreement is hereby amended to read as follows: In no event shall a Credit be issued by Lender if the sum of the face amount thereof, when added to the aggregate unfunded amounts of Credits then outstanding, would exceed $7,500,000.00, nor shall a Credit be issued by Lender if the sum of the face amount thereof, when added to the sum of the aggregate unfunded amounts of Credits then outstanding plus the aggregate amount of the Revolving Loans at such time outstanding, would exceed the lesser of (i) $25,000,000.00, or (ii) the Net Collateral Value in effect at such time. 3. Conditions Precedent to Effectiveness of this Amendment. This Amendment shall not be effective unless and until Lender receives, on or prior to February 13, 1998, an executed copy of the Revolving Note (as herein defined), an executed counterpart of this Amendment, resolutions of the Board of Directors of Borrower authorizing the transactions contemplated hereby, and a letter from each of the Grantors other than Borrower consenting to the transactions contemplated hereby, confirming their respective Security Instruments, and agreeing that such Security Instruments shall secure payment of all obligations of Borrower to Lender, including without limitation the increased amount of the Revolving Loans made available hereunder. 4. Representations; No Default. On and as of the date hereof, and after giving effect to this Amendment, Borrower (a) confirms, reaffirms and restates the representations and warranties set forth in the Loan Agreement and in the Security Instruments to which it is a party; provided, that each reference to the Loan Agreement therein shall be deemed included the Loan Agreement as amended by this Amendment; and (b) represents that no Default or Event of Default has occurred and is continuing. 5. Security Instruments. All of the liens, privileges, priorities and equities existing and to exist under and in accordance with the terms of the Security Instruments are hereby renewed, extended and carried forward as security for all of the Loans and all other debts, obligations and liabilities of Borrower to Lender, including without limitation the increased amount of Revolving Loans and Credit Obligations made available hereunder. 6. Payment of Expenses. Borrower agrees to pay or reimburse Lender for all reasonable legal fees and expenses of counsel to Lender in connection with the transactions contemplated by this Amendment. 7. Governing Law: Counterparts. The Amendment shall be governed by and construed in accordance with the laws of the State of Louisiana. This Amendment may be executed in any number of counterparts, all of which counterparts, when taken together, shall constitute one and the same instrument. 8. Continued Effect. Except as expressly modified herein, the Loan Agreement shall continue in full force and effect. The Loan Agreement as amended herein is hereby ratified and confirmed by the parties hereto. IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed and delivered as of the date hereinabove provided by their undersigned authorized officers, each hereunto duly authorized. AMERICAN OILFIELD DIVERS, INC. /s/ Cathy M. Green By:_____________________________________ Cathy M. Green, Chief Financial Officer FIRST NATIONAL BANK OF COMMERCE Nemesio Viso By:______________________________________ Vice President Title:_____________________________________