OMNI ENERGY SERVICES CORP
8-K, 1999-04-29
OIL & GAS FIELD EXPLORATION SERVICES
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             UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D.C. 20549


                                FORM 8-K


                             CURRENT REPORT

                   PURSUANT TO SECTION 13 OR 15(D) OF THE
                       SECURITIES EXCHANGE ACT OF 1934



       DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): MARCH 29, 1999



                          OMNI ENERGY SERVICES CORP.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

           LOUISIANA                0-23383               72-1395273
 (STATE OR OTHER JURISDICTION     (COMMISSION          (I.R.S. EMPLOYER
       OF INCORPORATION)          FILE NUMBER)         IDENTIFICATION NO.)




                             4500 NE INTERSTATE 49
                           CARENCRO, LOUISIANA 70520
              (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE)



                                (318) 896-6664
             (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)


                                NOT APPLICABLE
         (FORMER NAME OR FORMER ADDRESS, IF CHANGED SINCE LAST REPORT)








<PAGE>
ITEM 5.  OTHER EVENTS


On  March 29,  1999,  the  Registrant  entered  into  a Fourth Amendment to
Amended  and Restated Loan Agreement, dated March 29, 1999,  by  and  among
Hibernia,  the  Registrant,  and  certain of its subsidiaries, amending the
terms of the credit facilities and  certain  financial  covenants contained
therein.


ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS
     (c)  Exhibits

10.1 Fourth Amendment to Amended and Restated Loan Agreement  by  and among
     Hibernia, Omni Energy Services Corp., and certain of its subsidiaries.

<PAGE>
                                 SIGNATURE


    Pursuant  to  the requirements of the Securities Exchange Act of  1934,
the Registrant has  duly  caused  this report to be signed on its behalf by
the undersigned thereunto duly authorized.


                                   OMNI ENERGY SERVICES CORP.




April 29, 1999                     /s/  John H. Untereker
                                   ----------------------
                                   John H. Untereker
                                   Executive Vice President and
                                   Chief Financial Officer








          FOURTH AMENDMENT TO AMENDED AND RESTATED LOAN AGREEMENT


     THIS FOURTH AMENDMENT TO AMENDED AND RESTATED LOAN  AGREEMENT is dated
and  effective  as  of  March  29,  1999  (the "Fourth  Amendment"),  among
OMNI ENERGY SERVICES  CORP.,  a  Louisiana  corporation  (the  "Borrower"),
AMERICAN   AVIATION   L.L.C.,   a   Missouri   limited   liability  company
("Aviation"), OMNI ENERGY  SERVICES  CANADA  CORP.,  an   Alberta,   Canada
corporation formerly  known  as  Hamilton  Drill Tech Inc. ("Omni Canada"),
OMNI ENERGY SERVICES-ALASKA, INC., an Alaska  corporation  ("Omni Alaska"),
and HIBERNIA NATIONAL BANK, a national banking association (the "Bank").

                           W I T N E S S E T H:

     WHEREAS, the  Borrower,  Aviation,  Omni  Marine  &  Supply, Inc., and
the  Bank  have  heretofore  entered  into  an  Amended  and  Restated Loan
Agreement  dated  as  of  January 20, 1998, as  amended  by First Amendment
thereto  dated as of March 31, 1998, as amended by Second Amendment thereto
dated as of  July 31, 1998, and as amended by Third Amendment thereto dated
as of October  30,  1998 (as so amended, the "Loan Agreement"), pursuant to
which  the  Bank established  in  favor  of  the  Borrower  certain  credit
facilities consisting  of Acquisition Loans, Revolving Loans, Bridge Loans,
and a Term Loan;

     WHEREAS, subsequent  to  the  execution  of  the  Loan Agreement, Omni
Canada   and   Omni   Alaska  became  wholly-owned  subsidiaries   of   the
Borrower,  and  Omni Marine &  Supply,  Inc., a  Louisiana corporation, was
merged into the Borrower;

     WHEREAS, the Loans by  the  Bank  to  the  Borrower are guaranteed, IN
SOLIDO, by Aviation,  Omni Canada,  and  Omni  Alaska  as the Guarantors;

     WHEREAS,  the  Borrower,  with  the  consent  of  the  Guarantors, has
requested  that  the  Bank extend the maturity date of the Bridge  Note  to
January 20, 2000, and amend certain of the financial covenants contained in
the Loan Agreement; and

     WHEREAS, subject to the terms and conditions of the Loan Agreement, as
amended by this Fourth  Amendment,  the Bank is willing to amend certain of
the financial covenants contained in  the  Loan  Agreement,  subject to the
following  conditions:   (i)  a  reduction of the Revolving Loan Commitment
from $10,000,000.00 to $7,000,000.00;  (ii)  a reduction of the Bridge Line
Commitment from $6,639,200.00 to $2,639,200.00,  and  the conversion of the
Bridge  Note  to  a  term  loan; (iii) a reduction of the Acquisition  Loan
Commitment from $9,000,000.00  to  $7,937,889.00, and the conversion of the
Acquisition Note to a term loan; (iv)  the  execution  by  the  Borrower of
renewal promissory notes to evidence the reduced Revolving Loan Commitment,
the  Acquisition Loan Commitment, and the Bridge Line Commitment;  (v)  the
execution by the Borrower of a renewal Term Note; (vi) the execution by the
Borrower  and  the  Guarantors  of certified resolutions authorizing and/or
approving the transactions contemplated by this Fourth Amendment; and (vii)
all other conditions specified in this Fourth 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, except as
may be expressly set forth in this Fourth Amendment.

     2.   DEFINED TERMS REVISION.

          (a)  The definition  of  the  term  "Acquisition Loan Commitment"
appearing in Section 1.1 on page 2 of the Loan  Agreement is hereby deleted
and restated as follows:

               "ACQUISITION  LOAN  COMMITMENT"  shall   mean  the
               agreement by the Bank to make a $7,937,889.00 term
               loan  to the Borrower, all in accordance with  the
               provisions of paragraph 4 of the Fourth Amendment.

          (b)  The definition  of  the term "Acquisition Note" appearing in
Section 1.1 on page 2 of the Loan Agreement  is hereby deleted and restated
as follows:

               "ACQUISITION   NOTE"   shall  mean  that   certain
               promissory note more fully  described in paragraph
               4(b) of the Fourth Amendment,  together  with  any
               and  all  extensions, renewals, modifications, and
               substitutions therefor.

          (c)  The definition  of the term "Base Rate" appearing in Section
1.1 on page 3 of the Loan Agreement  is  hereby  deleted  and  restated  as
follows:

               "BASE  RATE"  shall  mean  the  rate  of  interest
               established  from  time to time by THE WALL STREET
               JOURNAL, as the "prime" lending rate, and which is
               not necessarily the  lowest  rate  charged  by the
               Bank,  such  rate to be adjusted automatically  on
               and as of the effective date of any change in such
               Base Rate.

          (d)  The definition  of  the  term  "Revolving  Loan  Commitment"
appearing in Section 1.1 on page 9 of the Loan Agreement is hereby  deleted
and restated as follows:

               "REVOLVING  LOAN   COMMITMENT"   shall   mean  the
               agreement  by  the  Bank  to  the Borrower to make
               Revolving Loans and to issue Credits in accordance
               with the  provisions  of  Article  II  hereof,  as
               amended by the Fourth Amendment.

          (e)  The  definition  of  the term "Revolving Note" appearing  in
Section 1.1 on page 9 of the  Loan Agreement is hereby deleted and restated
as follows:

               "REVOLVING   NOTE"   shall   mean   that   certain
               promissory note more fully described  in paragraph
               3(a)  of the Fourth Amendment, together  with  any
               and all  extensions,  renewals, modifications, and
               substitutions therefor.

          (f)  The definition of the term "Borrowing Base Amount" appearing
in  paragraph 2(a) of the Third  Amendment  is  hereby deleted and restated
as follows:

               "BORROWING   BASE  AMOUNT"  shall  mean:  for  the
               Revolving Loan Commitment, at any time, based upon
               the most recent  timely  submitted  borrowing base
               certificate  submitted  by  or  on behalf  of  the
               Borrower (but not less than on a weekly basis), as
               the same may be adjusted by the Bank  on  a  daily
               basis upon review of the Borrower's sales journals
               and  cash  receipts  and  as  a  result  of  field
               examinations  of  the Collateral (using reasonable
               lending   discretion),    the    lesser   of   (i)
               $7,000,000.00 or (ii) the  sum  of (x) the  amount
               of   Qualified  Receivables   at  such   time  and
               (y) advances, using  reasonable lending discretion
               and up  to  the   sublimit  (in   the   aggregate)
               of   $3,500,000.00,  to  finance  the   Borrower's
               acquisition of Eligible Parts and Supplies,  which
               advances  are  limited to a loan to value ratio of
               50%.

          (g)  The  definition   of   the  term  "Bridge  Line  Commitment"
appearing in paragraph 2(i) of the Third  Amendment  is  hereby deleted and
restated as follows:

               "BRIDGE LOAN COMMITMENT"  shall mean the agreement
               by the Bank to  the Borrower to make a  term  loan
               to  the  Borrower  in  the  principal  amount   of
               $2,639,200.00  in  accordance with  the provisions
               of   paragraph  6(b)  of  the  Fourth   Amendment.

          (h)  The  definition  of the  term  "Bridge  Line"  appearing  in
paragraph 2(i) of the Third Amendment  is  hereby  deleted  and restated as
follows:

               "BRIDGE LOAN" shall mean the term loan made by the
               Bank  to  the Borrower pursuant to the Bridge Loan
               Commitment.

          (i)  The definition  of  the  term  "Bridge  Note"  appearing  in
paragraph  2(i)  of  the  Third Amendment is hereby deleted and restated as
follows:

               "BRIDGE NOTE"  shall  have the meaning assigned to
               that  term  in  paragraph   6(b)   of  the  Fourth
               Amendment,  together with any and all  extensions,
               renewals,   modifications,    and    substitutions
               therefor.

          (j)  The following definition is hereby added  to  the  Loan
Agreement:

               "FOURTH  AMENDMENT" shall mean that certain Fourth
               Amendment  to  Amended and Restated Loan Agreement
               dated  as  of  March 29, 1999  by  and  among  the
               Borrower, Aviation,  Omni Canada, Omni Alaska, and
               the Bank.

     3.   REVISIONS TO ARTICLE II (REVOLVING  LOANS) OF THE LOAN AGREEMENT.
Subject to the terms and conditions of the Loan  Agreement,  as  amended by
this Fourth Amendment, the parties agree as follows:

          (a)  The  term  "Revolving  Note"  in  Section  2.2.1 of the Loan
Agreement shall henceforth mean that certain master promissory  note of the
Borrower  dated  March  29,  1999 in the maximum aggregate principal amount
of $7,000,000.00, payable to the  order  of the Lender on demand, or if  no
demand is made, on the Termination Date, and  bearing interest at the  Base
Rate  plus 1% (the "Revolving Note").  The  parties  acknowledge  that  the
Revolving  Note constitutes a reduction of the principal  amount  available
for Revolving  Loans  and  a  renewal and refinancing of the Revolving Note
dated January 20, 1998 by the Borrower  in  the maximum aggregate principal
amount of $10,000,000.00.

          (b)  The  reference  in  line  3 of Section  2.2.8  of  the  Loan
Agreement  to $10,000,000.00 shall henceforth  be  deemed  a  reference  to
$7,000,000.00.

     4.   REVISIONS   TO  ARTICLE  III  (ACQUISITION  LOANS)  OF  THE  LOAN
AGREEMENT.  Subject to  the  terms and conditions of the Loan Agreement, as
amended by this Fourth Amendment, the parties agree as follows:

          (a)  Sections 3.1, 3.2.2,  and  3.2.3,  and  3.2.6  of  the  Loan
Agreement are no longer applicable, and are hereby deleted.

          (b)  Section  3.2.1  of  the Loan Agreement is hereby deleted and
restated as follows:

               SECTION 3.2.1.  ACQUISITION  NOTE.  Subject to the
               terms and conditions of this Agreement, as amended
               by the Fourth Amendment, the Bank agrees to extend
               a  term  loan  to  the Borrower in  the  principal
               amount  of $7,937,889.00  (the  "Acquisition  Loan
               Commitment").   The Acquisition Loan Commitment by
               the Bank to the Borrower  shall  be evidenced by a
               promissory  note of the Borrower (said  promissory
               note being herein  referred to as the "Acquisition
               Note"),  dated  March  29, 1999,  payable  to  the
               order  of  the   Bank  in  the  principal  sum  of
               $7,937,889.00 with a final maturity of January 20,
               2000, and bearing interest  at  the Base Rate plus
               1%.

The  parties acknowledge that the Acquisition Note,  as  described  in  the
indented  paragraph  above,  evidences  a renewal and refinancing as a term
loan of the "Acquisition Note" dated January  20,  1998  by the Borrower in
the principal amount of $9,000,000.00.

          c.   Section  3.2.4 of the Loan Agreement is hereby  deleted  and
restated as follows:

               SECTION 3.2.4.   PAYMENT  OF  THE ACQUISITION NOTE
               UNDER THE ACQUISITION LOAN COMMITMENT.   Principal
               and  interest under the Acquisition Loan shall  be
               paid quarterly  based  on a five (5) year straight
               line  amortization,  with   a  final  maturity  of
               January 20, 2000.  The Borrower  hereby authorizes
               the Bank to debit the Dominion Account  to pay any
               amount  due  on  the  Acquisition Note.  The  Bank
               agrees to give notice to  the Borrower of any such
               debits  within three (3) Business  Days  following
               each such debit.


     5.  REVISION TO ARTICLE IV (TERM LOAN) OF THE LOAN AGREEMENT:  Section
4.2 of the Loan Agreement  is  hereby amended to reflect that the Term Note
described therein is now evidenced  by that certain renewal promissory note
dated  March  29,  1999  by  the  Borrower  in  the   principal  amount  of
$6,078,577.13, payable to  the  order  of  the  Bank,  and bearing interest
at the Base Rate plus 1%.


     6.   REVISIONS  TO  PARAGRAPH  3 (BRIDGE NOTE) OF THE THIRD AMENDMENT.
Subject to the terms and conditions of  the  Loan  Agreement, as amended by
this Fourth Amendment, the parties agree as follows:

          (a)  Subparts (a), (c), (d), and (e) of Paragraph  3 of the Third
Amendment are no longer applicable, and are hereby deleted.

          (b)  Subpart (b) of Paragraph 3 of the Third Amendment  is hereby
deleted and restated as follows:

               (b)   BRIDGE  NOTE.   Subject  to  the  terms  and
               conditions  of  this  Agreement, as amended by the
               Fourth Amendment, the Lender  agrees  to  extend a
               term loan to the Borrower in the principal  amount
               of  $2,639,200.00  (the "Bridge Loan Commitment").
               The indebtedness to the Bank under the Bridge Loan
               Commitment shall be evidenced by a promissory note
               made by the Borrower  (the  "Bridge  Note"), dated
               March 29, 1999, payable to the order of the   Bank
               in  the  principal  sum  of   $2,639,200.00,   and
               bearing  interest  at  the   Base  Rate  plus  2%.
               The indebtedness of the Borrower under the  Bridge
               Note shall be payable  as follows:  principal  and
               interest  shall  be  payable  in  three  quarterly
               payments  (July  30, 1999, October 30,  1999,  and
               January  20,  2000) based on a five year  straight
               line amortization.

The parties agree that the Bridge Note (as defined in the indented language
above) constitutes a renewal, refinancing, and  conversion  to term debt of
the  outstanding indebtedness evidenced by the "Bridge Note" dated  October
30, 1998 by the Borrower in the principal amount of $6,639,200.00.

     7.   REVISIONS  TO  ARTICLE  V  (FEES)  OF THE LOAN AGREEMENT.  The
following  new  Section is hereby added to the Loan  Agreement  as  Section
5.4:

               SECTION  5.4.  WAIVER  AND  EXTENSION  FEES.   The
               Borrower shall  pay to the Bank a waiver fee equal
               to the sum of .50%  of  each of the Revolving Loan
               Commitment  in the amount  of  $7,000,000.00,  the
               Acquisition  Loan  Commitment  in  the  amount  of
               $7,937,889.00, and the Term Loan Commitment in the
               amount of $6,078,577.13. In addition, the Borrower
               shall  pay  to  the Bank  a waiver  and  extension
               fee  equal  to 3.0% of the Bridge  Loan Commitment
               in the amount  of  $2,639,200.00.   The  foregoing
               waiver  and  extension   fees   shall  be  payable
               by the Borrower to the Bank upon execution  of the
               Fourth Amendment by the Borrower.

     8.   REVISION  TO  ARTICLE VI (INTEREST PAYABLE ON THE LOANS)  OF  THE
LOAN AGREEMENT.  Section 6.1 of the Loan Agreement is no longer applicable,
and is hereby deleted.

     9.   REVISIONS TO ARTICLE VII (CERTAIN GENERAL PROVISIONS) OF THE LOAN
AGREEMENT.  Sections 7.4, 7.5, 7.7, 7.8, and 7.9 of  the Loan Agreement are
no longer applicable, and are  hereby deleted.  In  addition,  the  parties
acknowledge that the  Loans  no  longer  bear  interest  at  the LIBOR Rate
plus  the Applicable Margin.

     10.  CONFIRMATION  OF  COLLATERAL  DOCUMENTS.   All   of   the  liens,
privileges,  priorities  and  equities  existing and to exist under and  in
accordance with the terms of the Collateral  Documents  are hereby renewed,
extended and carried forward as security for all of the Loans and all other
debts, obligations and liabilities of the Borrower to the  Bank.   Further,
the Guarantors hereby confirm their solidary liability for all Loans.

     11.  REVISION  TO  ARTICLE  IX  (CONDITIONS  PRECEDENT)  OF  THE  LOAN
AGREEMENT.   Section  9.1  of  the  Loan  Agreement  is  hereby deleted and
restated as follows:

               SECTION  9.1.  PRECEDENT TO ALL LOANS AND CREDITS.
               The obligation of  the Bank to make any Loan or to
               issue any Credit hereunder shall be subject to the
               satisfaction and the continued satisfaction of the
               following conditions precedent:

               (a) The Borrower shall have executed and delivered
               to the Bank the Fourth  Amendment,  the Notes, and
               all other documents required by this Agreement, as
               amended   by   the   Fourth  Amendment,  and   the
               Guarantors shall have  executed  and  delivered to
               the  Bank  the  Fourth  Amendment,  and all  other
               documents required by this Agreement,  as  amended
               by the Fourth Amendment, all in form and substance
               and  in  such  number  of  counterparts  as may be
               required by the Bank;

               (b) The representations, warranties, and covenants
               of the Borrower and the Guarantors as set forth in
               this   Agreement,   as   amended   by  the  Fourth
               Amendment, or in any Related Document furnished to
               the  Bank  in  connection herewith, shall  be  and
               remain true and correct;

               (c) The  Bank  shall  have  received  on or before
               April  2,  1999  at  5:00  p.m. a  favorable legal
               opinion  of  counsel  to  the  Borrower  and   the
               Guarantors,   in   form,   scope   and   substance
               satisfactory to the Bank;

               (d)   The   Bank  shall  have  received  certified
               resolutions of  the  Borrower  and  the Guarantors
               authorizing  the  execution  of all documents  and
               instruments contemplated by the Fourth Amendment;

               (e) The Bank shall have received all fees, charges
               and  expenses  which  are  due  and   payable   as
               specified   in   this   Agreement,   any   Related
               Documents, and/or in the Fourth Amendment;

               (f) No Default or Event of Default shall exist  or
               shall  result  from  the  making  of a Loan or the
               issuance of a Credit;

               (g)  The  Borrower and the Guarantors  shall  have
               provided the  Bank  with all financial statements,
               reports   and  certificates   required   by   this
               Agreement, as amended by the Fourth Amendment;

               (h) The Bank  shall  have received the articles of
               incorporation  and  bylaws,  as  amended,  of  the
               Borrower   and  the  articles   of   organization,
               operating agreement,  articles  of  incorporation,
               and bylaws, as amended, of the Guarantors, and the
               Bank's  counsel shall have reviewed the  foregoing
               documents  and is satisfied with the validity, due
               authorization  and  enforceability  thereof and of
               all Related Documents;

               (i)   The   Bank   shall  have  received  evidence
               acceptable to the Bank  and  its  counsel that its
               Encumbrances affecting the Collateral shall have a
               first priority position, subject only to Permitted
               Encumbrances;

               (j)  The  Borrower  shall have complied  with  the
               procedure set forth in  this Agreement, as amended
               by  the  Fourth  Amendment,  for  the  making of a
               Revolving  Loan;

               (k) There shall  have occurred no Material Adverse
               Change;

               (l) The Bank's due  diligence  and  review  of all
               financial information provided by the Borrower and
               the Guarantors, and  the Bank's field audit of the
               Borrower's books and records, shall be satisfactory
               to the Bank;

               (m) The Bank's receipt of a current listing of all
               senior and subordinated debt of the Borrower (on a
               consolidated basis);

               (n)   The   Borrower   must   maintain   insurance
               acceptable  to the Bank, naming Bank as additional
               insured and/or  loss  payee,  and  deliver to Bank
               evidence of such insurance coverages;

               (o) The Borrower must pay all outstanding fees and
               disbursements owed to Lender's counsel, and

               (p)  The  Borrower shall have transferred  to  its
               deposit accounts maintained with Bank the funds of
               the Borrower  on  deposit  at Bank One, Louisiana,
               N.A., which transfer shall occur  not  later  than
               the  Business  Day  after  the  Bank  receives the
               opinion   letter   described   in  Section  9.1(c)
               above.

     12.  REVISIONS  TO  ARTICLE XI (AFFIRMATIVE  COVENANTS)  OF  THE  LOAN
AGREEMENT.

          (a)  Section 11.1(e)  of the Loan Agreement is hereby deleted and
restated as follows:

               (e) within sixty (60)  days  after the end of each
               calendar quarter, a compliance  certificate signed
               by the chief financial officer of  the Borrower in
               the  form  attached  to  the  Fourth Amendment  as
               Exhibit  A, certifying that he has  reviewed  this
               Agreement,  as amended by the First Amendment, the
               Second Amendment,  the  Third  Amendment,  and the
               Fourth Amendment, and to the best of his knowledge
               no Default or Event of Default has occurred, or if
               such  Default  or  Event  of Default has occurred,
               specifying the nature and extent thereof, and that
               all  financial covenants in  this  Agreement  have
               been met,  and  providing  a  computation  of  all
               financial  covenants contained herein, and details
               of any waivers,  amendments,  or  modifications of
               any  covenant  contained  in  this  Agreement,  as
               amended.

          (b)  The Bank hereby waives for the period  ending  December  31,
1998,  compliance by the Borrower with the financial covenants contained in
Sections  11.9(a)  and 11.9(d) of the Loan Agreement.  The foregoing waiver
is a one-time waiver  by the Bank limited to the period ending December 31,
1998.

          (c)  Sections  11.9(a)  and  11.9(d)  of  the  Loan Agreement are
hereby deleted and Section 11.9(a) is replaced with the following:

               (a) MINIMUM EBITDA.  The Borrower shall maintain a
               minimum   EBITDA  on  a  consolidated   basis,  as
               follows: $0  during  the  first  quarter  of 1999;
               $1,400,000.00 during the second quarter of   1999;
               $3,000,000.00 during  the  third quarter  of 1999;
               and  $2,000,000.00  during the fourth  quarter  of
               1999.

          (d)  Section 11.9(b) of the Loan Agreement is hereby  deleted and
restated as follows:

               (b)  MAXIMUM  FUNDED  DEBT  TO TANGIBLE NET WORTH.
               The Borrower shall not allow  (on  a  consolidated
               basis) a ratio of Funded Debt divided by  Tangible
               Net Worth to exceed 1.25 to 1.00 at any time.

          (e)  Section 11.9(c) of the Loan Agreement is hereby  deleted and
restated as follows:

               (c)  MINIMUM  WORKING CAPITAL.  The Borrower shall
               at  all  times  maintain  working  capital  (on  a
               consolidated basis)  of not less than $500,000.00.
               For the purposes hereof,  "working  capital" shall
               mean total consolidated current assets  (including
               availability  under the Revolving Loan Commitment)
               less total consolidated current liabilities.

          (f)  The following new  financial covenant is hereby added to the
Loan Agreement as Section 11.9(e):

               (e)  MINIMUM TANGIBLE  NET  WORTH.   The  Borrower
               shall at all times maintain a minimum Tangible Net
               Worth  (on  a consolidated basis) of not less than
               $27,000,000.00.

          (g)  Section 11.13  of  the  Loan Agreement is hereby deleted and
restated as follows:

               SECTION 11.13.  DEPOSIT ACCOUNTS.   The  Borrower,
               the   Guarantors,   and   any  Subsidiary  of  the
               Borrower, will maintain all  deposit and operating
               accounts  of any kind (including  separate  tenant
               deposit  accounts)   with   the  Bank.   The  only
               exception to the foregoing is  that  the  Borrower
               may  maintain  its  payroll  account  with another
               bank.


          (h)  Section 11.16 of the Loan Agreement is  hereby  deleted  and
restated as follows:

               SECTION   11.16.    OWNERSHIP  OF  AVIATION,  OMNI
               CANADA, AND  OMNI ALASKA.   The  Borrower  and the
               Guarantors  covenant  and  agree that the Borrower
               shall  continue  to  own  100% of  the  membership
               interests of Aviation and 100%  of  the issued and
               outstanding  stock of Omni Canada and Omni Alaska.

          (i)  The  following  new covenant is hereby  added  to  the  Loan
Agreement as Section 11.22:

               SECTION 11.22.  APPRAISAL.   The  Borrower  hereby
               agrees that the Bank  is authorized to  commission
               a third party appraisal,  at  Borrower's  expense,
               of  all of Borrower's  equipment   and  inventory,
               including  aircraft and aviation equipment;  which
               appraisal  shall  be  delivered  to the Bank on or
               before  May 15, 1999.

          (j)  The following new covenant is added to the Loan Agreement as
Section 11.23:

               SECTION 11.23.   FUTURE  SUBORDINATED  DEBT AND/OR
               EQUITY  ISSUANCE.   The  Borrower agrees that  the
               proceeds of any (i) subordinated  Debt incurred by
               the  Borrower  after its execution of  the  Fourth
               Amendment and/or  (ii)  issuance  of  stock by the
               Borrower   after   its  execution  of  the  Fourth
               Amendment, shall be  used  by  the Borrower to pay
               down  the  Notes in the following  order:   Bridge
               Note, Acquisition  Note, Term Note,   and if there
               is  any  remaining  pay  down  amount  it  will be
               applied to the Revolving  Note.    Any  amount  so
               applied  to  reduce   the  Revolving  Note   shall
               constitute a permanent reduction thereof.

          (k)  The following new covenant is added to the Loan Agreement as
Section 11.24:

               SECTION 11.24.  PAY  DOWN  OF LOANS.  The Borrower
               agrees that it shall pay down and reduce the Loans
               (in the aggregate) by $10,000,000.00  on or before
               July 15, 1999.  The  pay  down  will be applied by
               Bank to the Notes in the following order:   Bridge
               Note, Acquisition Note, Term Note, and if there is
               any  remaining  amount  to  be applied, it will be
               applied  to  the  Revolving  Note.   Further,  any
               amount applied to the Revolving  Note  pursuant to
               this  Section  11.24  shall constitute a permanent
               reduction thereof.  The  failure  of  the Borrower
               to  comply  with  this  covenant  shall constitute
               a  Default  under  Section 13.1 of this Agreement.

          (l)  The following new covenant is added  to  the Loan Agreement
as Section 11.25:

               SECTION 11.25.  SUBSIDIARIES.  The Borrower agrees
               that  it  shall  not change the name  or alter the
               status  or  existence  of any of its Subsidiaries,
               including the Guarantors, without first obtaining
               the prior written consent of the Bank.

     13.  REVISION   TO  ARTICLE  XII  (NEGATIVE  COVENANTS)  OF  THE  LOAN
AGREEMENT.  Section 12.7  of  the  Loan  Agreement  is  hereby  deleted and
restated as follows:

               SECTION  12.7.  CHANGES IN MANAGEMENT AND CONTROL.
               The senior  management  of  the  Borrower will not
               change  without the prior written consent  of  the
               Bank, and  David  Jeansonne  will  remain  as  the
               Chairman  of  the  Board  of the Borrower until at
               least June 30, 2003.  In addition,  no  more  than
               51%  of  the  equity interest and voting rights in
               the Borrower will  change  during  the term of the
               Agreement, as amended by the Fourth Amendment.

     14.  REPRESENTATION:   NO DEFAULT.  On and as of  the  effective  date
hereof, and after giving effect  to this Fourth Amendment, the Borrower and
the  Guarantors  confirm,  reaffirm and  restate  the  representations  and
warranties set forth in the  Loan  Agreement  and the Collateral Documents;
provided, that each reference to the Loan Agreement  herein shall be deemed
to  include  the Loan Agreement as amended by this Fourth  Amendment.   The
Borrower and the  Guarantors  also represent and warrant that no Default or
Event of Default has occurred and is continuing under the Loan Agreement.

     15.  PAYMENT OF EXPENSES.  The Borrower agrees to pay or reimburse the
Bank for all legal fees and expenses  of  counsel to the Bank in connection
with the transactions contemplated by this Fourth Amendment.

     16.  WAIVER OF DEFENSES.  In consideration  of the Bank's execution of
this  Fourth  Amendment,  the  Borrower  and  the  Guarantors   do   hereby
irrevocably  waive  any  and  all  claims and/or defenses to payment on any
indebtedness owed by any of them to  the Bank that may exist as of the date
of execution of this Fourth Amendment.

     17.  AMENDMENTS.  THE LOAN AGREEMENT  AND  THIS  FOURTH  AMENDMENT ARE
CREDIT OR LOAN AGREEMENTS AS DESCRIBED IN LA. R.S. 6:<section>1121, ET SEQ.
THERE ARE  NO  ORAL AGREEMENTS BETWEEN THE BANK, THE BORROWER, OMNI ALASKA,
AVIATION, AND OMNI CANADA.  THE LOAN AGREEMENT, AS  AMENDED BY THIS  FOURTH
AMENDMENT, SETS FORTH THE ENTIRE AGREEMENT OF THE PARTIES  WITH RESPECT  TO
THE  SUBJECT  MATTER  HEREOF  AND  SUPERSEDES  ALL  PRIOR  WRITTEN AND ORAL
UNDERSTANDINGS BETWEEN THE  BORROWER,  AVIATION,  OMNI  ALASKA, OMNI CANADA
AND  THE  BANK, WITH  RESPECT  TO  THE  MATTERS HEREIN SET FORTH.  THE LOAN
AGREEMENT, AS  AMENDED  BY  THIS  FOURTH  AMENDMENT, MAY NOT BE MODIFIED OR
AMENDED  EXCEPT  BY  A  WRITING  SIGNED  AND  DELIVERED  BY  THE  BORROWER,
AVIATION, OMNI ALASKA, OMNI CANADA AND THE BANK.

     18.  GOVERNING  LAW:   COUNTERPARTS.  This Fourth Amendment  shall  be
governed by and construed in  accordance  with  the  laws  of  the State of
Louisiana.   This  Fourth  Amendment  may  be  executed  in  any number  of
counterparts,  all  of  which  counterparts,  when  taken  together,  shall
constitute one and the same instrument.

     19.  CONTINUED EFFECT.  Except as expressly modified herein,  the Loan
Agreement  shall continue in full force and effect.  The Loan Agreement  as
amended by this  Fourth  Amendment  is hereby ratified and confirmed by the
parties hereto.

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<PAGE>

     IN  WITNESS  WHEREOF,  the parties  hereto  have  caused  this  Fourth
Amendment to be executed and  delivered as of the date hereinabove provided
by the authorized officers each hereunto duly authorized.

                               OMNI ENERGY SERVICES CORP.

                               By:_____________________________________
                                 Name:  _______________________________
                                 Title: _______________________________


                               AMERICAN AVIATION L.L.C.
                               BY: OMNI ENERGY SERVICES CORP.,
                                       AS SOLE MEMBER

                               By:_____________________________________
                                 Name:  _______________________________
                                 Title: _______________________________


                               OMNI ENERGY SERVICES CANADA CORP.
                               (F/K/A HAMILTON DRILL TECH INC.)

                               By:_____________________________________
                                 Name:  _______________________________
                                 Title: _______________________________


                               OMNI ENERGY SERVICES- ALASKA, INC.

                               By:_____________________________________
                                  Name:  ______________________________
                                  Title: ______________________________


                               HIBERNIA NATIONAL BANK

                               By:_____________________________________
                                    Name:  Tammy M. Angelety
                                    Title: Assistant Vice President









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