Document:

<Page>

                                USD 27,500,000.00

                                CREDIT AGREEMENT

                                      AMONG

                     THE CIT GROUP/EQUIPMENT FINANCING, INC.

                                 AS THE LENDER,

                              HORIZON VESSELS, INC.

                                 AS THE BORROWER

                                       AND

                       HORIZON OFFSHORE CONTRACTORS, INC.

                                       AND

                             HORIZON OFFSHORE, INC.

                                AS THE GUARANTORS

                            DATED AS OF MAY 10, 2001

<Page>

                                TABLE OF CONTENTS

                                                                          Page
                                                                          ----

Section 1.  Definitions......................................................1
      1.1   Certain Definitions..............................................1
      1.2   Accounting Terms.................................................7

Section 2   .................................................................7
      2.1   Revolving Credit Facility........................................7
      2.2   Availability.....................................................8
      2.3   Initial Availability.............................................8
      2.4   Reduction of Initial Availability................................8
      2.5   Subsequent Availability..........................................9
      2.6   Annual Review....................................................9

Section 3.  The Note........................................................10

Section 4.  Manner of Drawdown..............................................10
      4.1   Manner of Drawdown..............................................10
      4.2   Disbursement of Funds...........................................10
      4.3   Failure to Borrow; Delay........................................10

Section 5   Interest........................................................11
      5.1   Rate of Interest................................................11
      5.2   Payment of Interest.............................................11
      5.3   Overdue Payment of Principal and Interest.......................11
      5.4   Compliance with Law.............................................11

Section 6   Loan Payments...................................................12
      6.1   Payments on Non-Business Days...................................12
      6.2   Repayment of Loan...............................................12
      6.3   Payment Procedure...............................................13
      6.4   Net Payments....................................................13
      6.5   Rights of Set-off...............................................13
      6.6   Changes in Circumstances........................................13

Section 7   Security........................................................16
      7.1   Mortgages.......................................................16
      7.2   Guaranty........................................................16
      7.3   Further Assurances..............................................16

                                       i
<Page>

Section 8   Conditions Precedent............................................16
      8.1   Documents Required as Conditions Precedent to the Drawdown of
            the First Advance...............................................16
      8.2   Additional Conditions Precedent to Subsequent Advances..........18
      8.3   Waiver of Conditions Precedent..................................19

Section 9   Fees and Expenses...............................................19
      9.1   Fees............................................................19
      9.2   Expenses........................................................19
      9.3   General Indemnity...............................................19
      9.4   Survival........................................................21

Section 10  Representations and Warranties of Borrower......................21
      10.1  Due Incorporation, Qualification, Etc...........................21
      10.2  Capacity........................................................21
      10.3  Authority and Enforceability....................................21
      10.4  Governmental Approvals..........................................22
      10.5  Compliance with Other Instruments...............................22
      10.6  Financial Statements............................................22
      10.7  Material Adverse Events.........................................23
      10.8  Litigation, Etc.................................................23
      10.9  Principal Place of Business.....................................23
      10.10 Patent and Other Rights.........................................23
      10.11 Taxes...........................................................23
      10.12 Employee Retirement Income
            Security Act of 1974............................................24
      10.13 Investment Company Act of 1940..................................24
      10.14 Subsidiaries. The Borrower has no subsidiaries..................24
      10.15 Environmental Compliance........................................24
      10.16 Indebtedness....................................................25

Section 11  Affirmative Covenants of Borrower...............................25
      11.1  Financial Statements, Reports and Inspection....................26
      11.2  Insurance.......................................................28
      11.3  Other Debt......................................................28
      11.4  Maintenance of Existence; Conduct of Business...................28
      11.5  Financial Records...............................................28
      11.6  Environmental Compliance........................................28
      11.7  Environmental Notifications.....................................29
      11.8  Environmental Indemnification...................................30
      11.9  Subordination of Indebtedness...................................30

                                       ii
<Page>

Section 12   Negative Covenants of Borrower.................................30
      12.1   Liens..........................................................30
      12.2   Line of Business...............................................32
      12.3   Consolidation, Merger, Etc.....................................32
      12.4   Modification of Agreements.....................................32
      12.5   Indebtedness...................................................32
      12.6   Reportable Event...............................................33
      12.7   Change of Legal Structure......................................33
      12.8   Change of Place of Business....................................33
      12.9   Subsidiaries...................................................33
      12.10  Management of Vessels..........................................33
      12.11  Charter........................................................33
      12.12  Modifications to Vessels.......................................33
      12.13  Sale of Vessel, Etc............................................33
      12.14  Current Ratio..................................................34
      12.15  Working Capital................................................34
      12.16  Fixed Charge Coverage Ratio....................................34
      12.17  Debt Ratio.....................................................34
      12.18  Net Worth......................................................34
      12.19  Compliance with Federal Reserve Board Regulations..............34
      12.20  Loans and Investments..........................................35
      12.21  Contracts with Affiliates......................................35
      12.22  Change of Management...........................................35
      12.23  Lease Payments.................................................35
      12.24  Dividends......................................................35
      12.25  Fiscal Years...................................................35
      12.26  Capital Expenditures...........................................35
      12.27  Use of Vessels.................................................35

Section 13   Events of Default..............................................35
      13.1   Events.........................................................35

                                      iii
<Page>

Section 14   Miscellaneous..................................................38
      14.1   Entire Agreement...............................................38
      14.2   No Waiver......................................................38
      14.3   Survival.......................................................38
      14.4   Notices........................................................38
      14.5   Termination....................................................39
      14.6   Severability of Provisions.....................................39
      14.7   Successors and Assigns.........................................39
      14.8   Assignment and Participation...................................39
      14.9   Counterparts...................................................40
      14.10  Jurisdiction...................................................40
      14.11  Choice of Law..................................................40
      14.12  Waiver of Jury Trial...........................................40
      14.13  Amendment and Waiver...........................................41
      14.14  No Oral Agreements.............................................41
      14.15  Headings, Etc..................................................41
      14.16  Taxes..........................................................41
      14.17  Controlling Agreement..........................................41

Exhibit A -       Promissory Note
Exhibit B -       Request for Borrowing

                                       iv
<Page>

                                CREDIT AGREEMENT

      THIS CREDIT AGREEMENT dated as of May 10, 2001 (this "Credit Agreement"),
among Horizon Vessels, Inc., a corporation organized and existing under the laws
of the State of Delaware, (the "Borrower"), Horizon Offshore, Inc., a
corporation organized and existing under the laws of the State of Delaware and
Horizon Offshore Contractors, Inc., a corporation organized and existing under
the laws of the State of Delaware (the "Guarantors") and The CIT Group/Equipment
Financing, Inc., a corporation organized and existing under the laws of the
State of Delaware (the "Lender").

                              W I T N E S S E T H:

      WHEREAS, the Borrower is in the offshore construction business; and

      WHEREAS, the Borrower has requested financing from Lender in a principal
amount of up to Twenty Seven Million Five Hundred Thousand United States Dollars
(USD 27,500,000.00) to repay existing debt of the Borrower, assist with the cost
of upgrading the Vessels and provide working capital for the Borrower; and

      WHEREAS, the Lender is prepared to provide the financing described above
on the terms and conditions contained in this Credit Agreement;

      NOW, THEREFORE, in consideration of the above recitals, and other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties agree as follows:

Section 1. DEFINITIONS.

      1.1 CERTAIN DEFINITIONS. As used herein, the following terms shall have
the following respective meanings:

      "ADVANCE" means a loan by the Lender to the Borrower under this Credit
Agreement.

      "AFFILIATE" of any Person means (i) any Person directly or indirectly
controlled by, controlling or under common control with such first Person and
(ii) any director or officer of such first Person or of any Person referred to
in clause (i) above. For the purposes of this definition "control" of any Person
includes (a) with respect to any corporation or other Person having voting
shares or the equivalent and elected directors,

                                       1
<Page>

managers, or Persons performing similar functions, the ownership or power to
vote, directly or indirectly shares or the equivalent representing 50% or more
of the power to vote in the election of directors, managers or Persons
performing similar functions, (b) ownership of 50% or more of the equity or
beneficial interest in any other entity and (c) the ability to direct the
business and affairs of any Person by acting as a general partner, manager or
otherwise.

      "AVAILABILITY" means at any time an amount determined pursuant to Section
2 below.

      "BUSINESS DAY" means any day on which commercial banks are open for
business in Houston, Texas, and New York, New York.

      "CASH EQUIVALENTS" means (i) securities issued or directly and fully
guaranteed or insured by the United States of America or any agency or
instrumentality thereof having maturities of not more than one (1) year from the
date of acquisition, (ii) time deposits (including Eurodollar time deposits) and
certificates of deposit of any bank meeting the qualifications specified in
clause (iv) below with maturities of not more than 90 days from the date of
acquisition, (iii) fully secured repurchase obligations with a term of not more
than 90 days for underlying securities of the types described in clause (i)
entered into with any bank meeting the qualifications specified in clause (iv)
below, (iv) commercial paper issued by the parent corporation of any bank
referred to in this clause (iv) or any commercial bank of recognized standing
having capital and surplus in excess of USD 300,000,000.00 and commercial paper
rated at least A-2 or the equivalent thereof by Standard & Poor's Corporation or
at least P-2 or the equivalent thereof by Moody's Investor Services, Inc., and
in each case maturing within 90 days after the date of acquisition, and (v)
remarketed certificates of participation issued through any bank meeting the
qualifications specified in clause (iv) above rated at least A-2 or the
equivalent thereof by Standard & Poor's Corporation or at least P-2 or the
equivalent thereof by Moody's Investor Services, Inc. and maturing within 90
days after the date of acquisition.

      "COLLATERAL VALUE" means the most recent determination of the aggregate
Distress Values of the Vessels.

      "COMMITMENT" means USD 27,500,000.00.

      "CONTROLLED GROUP" means a "controlled group of corporations" as defined
in Section 1563(a) of the Internal

                                       2
<Page>

Revenue Code of 1986, as amended, determined without regard to Section
1563(a)(4) and (e) (3) (C) of such Code, of which either Borrower is a part.

      "CURRENT ASSETS" means those assets of the Parent which would in
accordance with GAAP be classified on a consolidated basis as current assets of
a corporation conducting a business the same as or similar to the business of
the Borrower and the Guarantors.

      "CURRENT LIABILITIES" means Indebtedness of the Parent which would in
accordance with GAAP be classified on a consolidated basis as current
liabilities of a corporation conducting a business the same as or similar to the
business of the Borrower and the Guarantors, including the current maturities of
amounts outstanding under this Credit Agreement and the current maturities of
the Borrower's or the Guarantors' other long-term debt.

      "CURRENT RATIO" means the ratio of the Parent's Current Assets to the
Parent's Current Liabilities.

      "DEBT RATIO" means the Parent's total consolidated long-term funded debt
plus capitalized lease obligations divided by the sum of consolidated long-term
funded debt, capitalized lease obligations and stockholders' equity.

      "DISTRESS VALUE" means for any Vessel the meaning customarily attributed
to it in the marine equipment appraisal industry at the time of valuation, less
the estimated marshalling, reconditioning and sale expenses designed to maximize
the resale value of such Vessel, all as determined by an independent appraisal
firm chosen by the Lender and reasonably acceptable to the Borrower. The
appraisal firm's valuation shall be made with or without physical inspection as
required by this Credit Agreement.

      "DOLLARS" and the sign "USD" mean lawful money of the United States of
America.

      "DRAWDOWN DATE" means the date upon which an Advance is made.

      "EBITDA" means, for any period, the consolidated earnings of the Parent
during such period from continuing operations, before gains or losses on sales
of assets (to the extent such gains or losses are included in earnings from
continuing operations) and extraordinary items, as determined under GAAP,

                                       3
<Page>

federal, state, foreign and local income taxes, Interest Expense, depreciation
and amortization.

      "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

      "EVENT OF DEFAULT" means each of the Events of Default described in
Section 13 hereof.

      "FIXED CHARGE COVERAGE RATIO" means for any period, EBITDA divided by the
sum total of Interest Expense, required principal payments on Indebtedness and
capital leases, and actual Taxes paid.

      "GAAP" means generally accepted accounting principles in effect from time
to time in the United States of America.

      "GOVERNMENTAL AGENCY" means any United States or foreign government or any
state, department or other political subdivision thereof or governmental body,
agency, authority, department or commission (including without limitation any
court or tribunal) exercising executive, legislative, judicial, regulatory or
administrative functions of or pertaining to government and any corporation,
partnership or other entity directly or indirectly owned by the foregoing.

      "GOVERNING RATE" means a rate equal to the Thirty Day LIBOR Rate. "THIRTY
DAY LIBOR RATE" shall mean the rate of interest set forth in the "Money Rates"
column of the Wall Street Journal under the heading "London Interbank Offering
Rates (LIBOR)" for thirty days (presently described there as the average of
interbank offering rates for dollar deposits in the London market presently
based on quotations at sixteen major banks), which appears in the Wall Street
Journal. If such rate does not appear in the Wall Street Journal, the Thirty Day
LIBOR Rate shall be determined from such source as the Lender shall determine.
The Governing Rate shall be determined as of the first Business Day of each
month and be applicable for that month.

      "GUARANTY" means the guaranty by the Guarantors of the Borrower's
obligations under this Credit Agreement and the Note dated as of the date
hereof, as amended and ratified from time to time.

      "HAZARDOUS SUBSTANCES" means petroleum and used oil, or any other
pollutant or contaminant, hazardous, dangerous or toxic waste, substance or
material as defined in the Comprehensive

                                       4
<Page>

Environmental Response, Compensation and Liability Act of 1980, as amended, 42
U.S.C. ss. 9601, ET SEQ. (hereinafter called "CERCLA"); the Resource
Conservation and Recovery Act, as amended, 42 U.S.C.ss. 9601, ET SEQ.
(hereinafter called "RCRA"); the Toxic Substances Control Act, as amended, 15
U.S. C. ss. 2601, ET SEQ. (hereinafter called "TSCA"); the Hazardous Materials
Transportation Act, as amended, 49 U.S.C. ss. 1801, ET seq. (hereinafter called
"HMTA"); the Oil Pollution Act of 1990, 33 U.S.C. ss. 2701 ET SEQ. (hereinafter
called "OPA"); or any other statute, law, ordinance, code or regulation of any
Governmental Agency relating to or imposing liability or standards of conduct
concerning the use, production, generation, treatment, storage, recycling,
handling, transportation, release, threatened release or disposal of any waste,
substance or material, currently in effect or at any time hereafter adopted.

      "INDEBTEDNESS" of the Borrower or the Guarantors means all items of
indebtedness which, in accordance with GAAP, would be included in determining
liabilities as shown on the liability side of a balance sheet of the Borrower or
the Guarantors, as of the date as of which indebtedness and liabilities is to be
determined and shall include all indebtedness and liabilities of others assumed
or guaranteed by the Borrower or the Guarantors or in respect of which the
Borrower or the Guarantors are secondarily or contingently liable (other than by
endorsement of instruments in the course of collection and performance
guarantees and similar transactions entered into in the ordinary course of
business) whether by reason of any agreement to acquire such indebtedness or to
supply or advance sums or otherwise but shall exclude deferred Taxes.

      "INTEREST EXPENSE" means, with respect to any Person, for any period of
determination, its interest expense determined in accordance with GAAP.

      "INTEREST PAYMENT DATE" means, with respect to any Advance, the last
Business Day of each month.

      "INTEREST PERIOD" means each respective and successive calendar month
commencing on the last day of the month in which the initial Advance is made;
provided, however, that no Interest Period shall commence or extend beyond the
Maturity Date.

      "LOAN" means the principal amounts advanced by the Lender hereunder and
outstanding.

      "LOAN DOCUMENTS" means this Credit Agreement, the Mortgages, the Guaranty,
and the Note.

                                       5
<Page>

      "MATERIAL ADVERSE EFFECT" or "MATERIALLY ADVERSELY AFFECTED" means, unless
specified otherwise, to affect in a material manner the ability of the Borrower
to perform its obligations under this Credit Agreement or the ability of the
Guarantors to perform their obligations under the Guaranty.

      "MATURITY DATE" means May 10, 2004.

      "MORTGAGES" means the United States First Preferred Fleet Mortgage on the
U.S. flag Vessels and the Vanuatu First Preferred Fleet Mortgage on the Vanuatu
flag Vessels.

      "NET WORTH" means at a particular date, the sum of the Parent's capital
stock (excluding treasury stock), warrants, surplus (including earned surplus,
capital surplus and the balance of the current profit and loss account not
transferred to surplus), debt that is specifically subordinated to the Loan on
terms acceptable to the Lender accounted on a consolidated basis appearing on a
consolidated balance sheet prepared in accordance with GAAP as of the date of
determination and after deducting therefrom the net book value of all assets
(after deducting any reserves applicable thereto) which would be treated as
intangibles under GAAP (including without limitation, such items as goodwill,
trademarks, trade names, patents and licenses, franchises and operating rights).

      "NOTE" means the secured promissory note of the Borrower in the original
principal amount of USD 27,500,000.00, substantially in the form of Exhibit A
hereto and all renewals, extensions, rearrangements and replacements thereof.

      "OBLIGATIONS" means and includes all loans, advances, debts, liabilities,
obligations, letters of credit or any other financial accommodations, howsoever
arising, owing by the Borrower to the Lender of every kind and description
(whether or not for the payment of money); direct or indirect, absolute or
contingent, due or to become due, now existing or hereafter arising pursuant to
the terms of this Credit Agreement, the Note and the other Loan Documents,
including, without limitation, all interest and other expenses that the Borrower
is obligated to pay thereunder.

      "PARENT" means Horizon Offshore, Inc., a Delaware corporation.

      "PERSON" means any natural person, corporation, partnership, limited
liability company, firm, association, government, Governmental Agency or any
other entity other than

                                       6
<Page>

the Borrower and whether acting in an individual, fiduciary or other capacity.

      "PLAN" means any employee pension benefit plan subject to Title IV of
ERISA and maintained by the Borrower or any member of a Controlled Group, or any
such plan, to which the Borrower or any member of a Controlled Group is required
to contribute on behalf of any of its employees.

      "REPORTABLE EVENT" means a reportable event as defined in Section 4043 of
ERISA (29 U.S.C. ss.1343), except events for which the notice provision has been
waived by the Pension Benefit Guaranty Corporation.

      "REQUEST FOR BORROWING" means each request for borrowing given by the
Borrower pursuant to Section 4.1(c) hereof, substantially in the form attached
hereto as Exhibit B.

      "REVOLVING CREDIT FACILITY" means the USD 27,500,000.00 senior secured
revolving loan provided for in Section 2 of this Credit Agreement.

      "TAXES" means any present or future taxes, levies, imposts, duties or
other charges of whatsoever nature imposed by any Governmental Agency or taxing
authority thereof.

      "VESSELS" means the two (2) U.S. flag vessels and the four (4) Vanuatu
flag vessels listed on Schedule 1 attached hereto.

      "WORKING CAPITAL" means the excess of the Parent's Current Assets over its
Current Liabilities.

      1.2 ACCOUNTING TERMS. Except as expressly stated herein, all accounting
terms not specifically defined herein shall be construed in accordance with GAAP
consistent with those applied in preparation of the consolidated financial
statements of the Parent referred to in Section 11.1 hereof.

Section 2.

      2.1 REVOLVING CREDIT FACILITY.

      Upon the terms and subject to the conditions herein set forth, the Lender
agrees to make the senior secured revolving credit facility available to the
Borrower by, from time to time prior to the Maturity Date, making an Advance or
Advances to the Borrower, PROVIDED that the principal amounts of all outstanding
Advances shall not exceed, in the aggregate, the lesser of the

                                       7
<Page>

Availability or USD 27,500,000.00 at any one time. Within such limit, the
Borrower may borrow, repay pursuant to Section 6.2(a) and reborrow under this
Section 2.1. Each borrowing by the Borrower from the Lender under this Section
2.1 shall be no less than USD 100,000.00.

      2.2 AVAILABILITY.

      (a) Notwithstanding any other provision of this Credit Agreement, the
aggregate principal amount of Advances at any time outstanding shall not be in
excess of the Availability.

      (b) Within thirty (30) days of the initial Drawdown Date, the Lender shall
obtain an appraisal of the Vessels. This appraisal may be a desktop appraisal
not involving the physical inspection of the Vessels and shall serve as the
basis for the determination of the Distress Value, Collateral Value and
Availability for the initial Advance. Within ninety (90) days of the initial
Drawdown Date, the Lender shall obtain appraisals of the Vessels based on
physical inspections of the Vessels, which appraisal shall serve as the basis
for the Distress Value, Collateral Value and Availability until the first
anniversary of the initial Drawdown Date. Appraisals based on physical
inspections of the Vessel will be obtained by the Lender by succeeding
anniversary dates of the initial Drawdown Date in order to establish the
Distress Value, Collateral Value and Availability for the succeeding year.

      (c) If at any time the test of Section 2.2(a) above is not met, the
Borrower shall at the Lender's direction either (i) within ten (10) Business
Days provide to the Lender sufficient additional collateral in form and
substance satisfactory to the Lender as shall be necessary to insure that the
test of Section 2.2(a) above is satisfied or (ii) within three (3) Business Days
prepay pursuant to Section 6.2 below an amount as may be necessary to reduce the
aggregate principal amount outstanding under the Loan to an amount which will
allow the test of Section 2.2(a) above to be met. The cure periods listed above
shall commence on the date notice of the Lender's decision is given to the
Borrower.

      2.3 INITIAL AVAILABILITY. Notwithstanding anything else contained in this
Credit Agreement, the initial Advance may be in an amount equal to the
Commitment.

      2.4 REDUCTION OF INITIAL AVAILABILITY. If the appraisal referred to in the
first sentence of Section 2.2(b) above is not received within the time period
referred to in such section, the

                                       8
<Page>

Availability shall be immediately reduced to USD 22,500,000 and if such
appraisal is not received within ninety (90) days of the initial Drawdown Date,
the Availability will be immediately reduced to USD 17,000,000.

      2.5 SUBSEQUENT AVAILABILITY. Following the receipt of the appraisal
referred to in Section 2.2(b) above, the Availability shall be the lesser of 66
2/3% of Collateral Value or USD 27,500,000. After the initial Advance, the
Availability for subsequent Advances will be the difference between amounts
outstanding under the Loan and 66 2/3% of Collateral Value, or USD 27,500,000,
whichever is less.

      2.6 ANNUAL REVIEW. (a) On each anniversary of the first Drawdown Date, the
Lender shall conduct a review of the Loan. As part of such review, the Lender
shall consider the annual appraisals of the Vessels referred to in Section
2.2(b) above, the most recent financial information of the Borrower and the
Guarantors provided pursuant to Section 11.1 below, the compliance of the
Borrowers and the Guarantors with the covenants contained in Sections 11 and 12
below and the payment and default history of the Borrower under this Credit
Agreement.

      (b) If as a result of such review the Lender determines in its absolute
discretion that it wishes to terminate this Credit Agreement, it shall give the
Borrower written notice of such decision and the Borrower shall pay all amounts
outstanding under this Credit Agreement, the Note and the other Loan Documents
and all accrued interest thereon within five (5) Business Days of such notice.
No prepayment premium or penalty shall be due in connection with such payment.

      (c) If the Borrower wishes to extend the Loan and this Credit Agreement
beyond the Maturity Date, it shall give the Lender written notice of such a
request not less than one hundred and twenty (120) days before the next
anniversary of the first Drawdown Date. The Lender shall then conduct the review
described in Section 2.6(a) above and at least thirty (30) days prior to the
next anniversary of the first Drawdown Date the Lender shall inform the Borrower
in writing whether it agrees to such an extension and, if so, on what terms and
conditions. If the Borrower does not agree to such terms and conditions, all
amounts outstanding under this Credit Agreement, the Note and the other Loan
Documents and all accrued interest thereon shall be paid by the Borrower on the
Maturity Date.

                                       9
<Page>

Section 3. THE NOTE.

      (a) The Borrower's obligations to pay the principal of, and interest on,
the Loan shall be evidenced by the Note.

      (b) At the time of the making of each Advance, and upon each payment of
the principal of the Loan, the Lender, and is hereby authorized to, make a
notation on the Note specifying the date and the amount of such Advance or such
payment. Failure to make any such notation shall not limit or otherwise affect
the Borrower's or either Guarantors' obligations in respect of this Credit
Agreement or the Note.

Section 4. MANNER OF DRAWDOWN.

      4.1 MANNER OF DRAWDOWN. The Borrower may draw an Advance upon:

      (a) The Lender's prior satisfaction that the relevant conditions set out
in Section 8 below have been complied with.

      (b) No event having occurred to the actual knowledge of the Borrower
which, with or without notice or lapse of time, would constitute an Event of
Default.

      (c) The Lender having received from the Borrower, an irrevocable Request
for Borrowing before 10:00 a.m. New York time at least one (1) and not more than
ten (10) Business Days prior to the Drawdown Date selected by the Borrower.

      4.2 DISBURSEMENT OF FUNDS. Disbursement of each Advance's proceeds shall
be made by the Lender to the Borrower as directed by the Borrower in the Request
for Borrowing.

      4.3 FAILURE TO BORROW; DELAY. If the borrowing described in any Request
for Borrowing fails to take place or is delayed because any of the conditions
specified in Section 8 below are not satisfied, the Borrower shall indemnify the
Lender against any loss incurred as a result of the giving of such Request for
Borrowing, including without limitation any loss resulting from actions taken by
the Lender to fund the requested Advance, but excluding any loss resulting from
the gross negligence or willful misconduct of the Lender. A certificate of the
Lender stating in reasonable detail the amount of, and basis for, any such loss
incurred by the Lender shall be conclusive absent manifest error.

                                       10
<Page>

Section 5. INTEREST.

      5.1 RATE OF INTEREST.

      (a) The Borrower agrees to pay interest in respect on the average daily
balance of all amounts outstanding under the Loan at a rate per annum of the
Governing Rate plus 2.90%.

      (b) Interest on unpaid principal amounts of the Loan shall be computed on
the basis of a year of 360 days and the actual number of days elapsed.

      5.2 PAYMENT OF INTEREST. Interest shall be paid by the Borrower on each
Interest Payment Date.

      5.3 OVERDUE PAYMENT OF PRINCIPAL AND INTEREST. Overdue principal of, and
(to the extent permitted by law) overdue interest in respect of, amounts due
under this Credit Agreement shall bear interest, payable on demand, at a rate
per annum which shall be 2% in excess of the interest rate otherwise applicable
pursuant to Section 5.1 above.

      5.4 COMPLIANCE WITH LAW. Notwithstanding any provision of this Credit
Agreement or the Note to the contrary, in no event shall the aggregate amount of
consideration which constitutes interest under any applicable law which is
contracted for, charged or received hereunder or under this Credit Agreement or
the Note ("Interest") exceed the maximum amount of nonusurious interest allowed
by law, and any excess shall be credited on this Credit Agreement or the Note
(or if all obligations under this Credit Agreement and the Note shall have been
paid in full, refunded to the Borrower). For purposes of the foregoing, the
maximum amount of interest allowed by law shall be calculated by determining the
amount of interest that could be contracted for, charged or received during the
term hereof at the maximum rate of nonusurious interest allowed from time to
time by applicable law as is now or, to the extent allowed by law, as may
hereafter be in effect (the "maximum nonusurious interest rate") and, if at any
time the rate of Interest to accrue would exceed the maximum nonusurious
interest rate, the rate of Interest to accrue under the Note shall be limited to
the maximum nonusurious interest rate, but any subsequent reductions in the
Governing Rate shall not reduce the rate of Interest to accrue under this Credit
Agreement or on the Note below the maximum nonusurious interest rate until the
total amount of Interest accrued and paid under this Credit Agreement or on the
Note equals the amount of Interest which could have accrued if a rate

                                       11
<Page>

per annum equal to the Governing Rate plus 2.90% had at all times been in
effect.

Section 6. LOAN PAYMENTS

      6.1 PAYMENTS ON NON-BUSINESS DAYS. Whenever any payment to be made
hereunder or under the Note shall be stated to be due on a day which is not a
Business Day, the due date thereof shall be extended to the next succeeding
Business Day; provided, however, that if such next succeeding Business Day is in
a new month, then the payment required under this Credit Agreement or the Note
shall be made on the first Business Day preceding the original date on which
payment was due. If a payment of principal has been extended pursuant to this
Section 6.1, interest shall be payable on such principal at the applicable rate
during such extension.

      6.2 REPAYMENT OF LOAN.

      (a) The Borrower may repay any amounts outstanding under the Loan prior to
the Maturity Date upon irrevocable written notice to the Lender no later than
4:00 p.m. New York time on the day before repayment and without prepayment fee
or penalty. All repayments under this Section 6.2(a) shall be no less than USD
100,000.

      (b) (i) After the first anniversary of the first Drawdown Date, the
Borrower may terminate this Credit Agreement and prepay in full all amounts
outstanding under the Note and this Credit Agreement on any subsequent Interest
Payment Date after giving at least ten (10) Business Days prior notice of such
intent to terminate and prepay and payment to the Lender of accrued and unpaid
interest under the Note and all other amounts due under this Credit Agreement
and the other Loan Documents, including the prepayment premium referred to
below. Any notice of termination and prepayment hereunder shall be irrevocable.

            (ii) Prepayments made under this Section 6.2(b) shall include a
prepayment premium as follows:

                  (A) If made on or before the second anniversary of the first
Drawdown Date two percent (2%) of the Commitment;

                  (B) If made on or before the third anniversary of the first
Drawdown Date - one percent (1%) of the Commitment.

      (c) The Borrower shall repay all amounts outstanding under the Loan to the
Lender in one payment on the Maturity Date.

                                       12
<Page>

      6.3 PAYMENT PROCEDURE. All payments and prepayments made by the Borrower
under the Note or this Credit Agreement shall be made by wire transfer in
immediately available funds before 12:00 noon, New York Time on the date such
payment is required to be made to the Lender pursuant to the Lender's written
instructions. Any payment received and accepted by the Lender after such time
shall be considered for all purposes (including the calculation of interest, to
the extent permitted by law) as having been made on the next following Business
Day. All payments and prepayments received shall be applied first to accrued
interest and then to the reduction of principal.

      6.4 NET PAYMENTS.

      (a) All sums payable by the Borrower under this Credit Agreement, or the
Note, whether of principal, interest, fees or otherwise, shall be paid in full
without set-off or counterclaim and in such amounts as may be necessary in order
that all such payments (after deduction or withholding for or on account of any
Taxes, other than any Tax, on or measured by the income of the Lender) shall not
be less than the amounts otherwise specified to be paid under this Credit
Agreement or the Note.

      (b) A certificate as to any additional amounts payable to the Lender under
this Section 6.4 submitted to the Borrower by the Lender shall show in
reasonable detail the amount payable and the calculations used to determine in
good faith such amount and shall be conclusive absent manifest error.

      (c) With respect to each deduction or withholding for or on account of any
Taxes, the Borrower shall promptly furnish to the Lender such certificates,
receipts and other documents as may be required (in the reasonable judgment of
the Lender) to establish any income tax credit to which the Lender may be
entitled. In the event that such a deduction or withholding for Taxes becomes so
applicable, the Lender and the Borrower will use their best efforts to minimize
the effect of such Taxes.

      6.5 RIGHTS OF SET-OFF. Lender shall, with respect to the Loan and all
other amounts payable hereunder, have all rights of set-off, banker's lien and
counterclaim as it is entitled to exercise under the law of the jurisdiction in
which such rights are exercised.

      6.6 CHANGES IN CIRCUMSTANCES.

      (a) If, by reason of any change subsequent to the date of this Credit
Agreement in applicable law or regulation or

                                       13
<Page>

regulatory requirement or directive whether or not having the force of law or in
the interpretation or application thereof by the governmental or
quasi-governmental or judicial authority or central bank charged with the
administration or interpretation of such law or regulation (a "Change in
Circumstance"), the Lender shall determine in good faith that it has become
unlawful or impossible for it to perform its obligations hereunder, the Lender
shall immediately notify the Borrower and, after such notice, the liability of
the Lender to advance or maintain the Advances shall immediately cease or, if
any Advance has been made, the Borrower shall prepay to the Lender such Advance.
In any such event, but without prejudice to the aforesaid obligation of the
Borrower to prepay, the Borrower and the Lender shall negotiate in good faith
for a period not to exceed ninety (90) days commencing from the date notice is
given by the Lender as provided above, with a view to agreeing to terms for
making or continuing to make available the Commitment from another jurisdiction
or funding of the affected Advance.

      (b) If the effect of any Change in Circumstance having effect after the
date hereof, is to:

            (i) change the basis of taxation to the Lender of payment of
      principal or interest or any other payment due pursuant to the terms of
      this Credit Agreement or the Note (other than an increase in the rate of
      taxation on the Lender's overall net income); or

            (ii) impose or modify or deem applicable any reserve requirements or
      require the making of any special deposits against or in respect of any
      assets or liabilities of, deposits with or for the account of or loans by
      the Lender; or

            (iii) impose on the Lender any other condition affecting the
      Commitment or the Loan or any part thereof, the result of which is either
      to increase the cost to the Lender of making available or maintaining the
      Commitment or the Loan or any part thereof or to reduce the amount of any
      payment received by the Lender hereunder; then and in any such case if
      such increase or reduction in the opinion of the Lender materially affects
      the interests of the Lender;

                  (A) the Lender shall notify the Borrower of any of the above
            circumstances and the Lender shall use all reasonable efforts
            (without

                                       14
<Page>

            any financial commitment on its part) to avoid the effects of any
            such change and in particular, shall consider (without any
            commitment on its part) fulfilling its obligations under this Credit
            Agreement through another office or transferring its interest in
            this Credit Agreement and the Note at par to one or more of its
            Affiliates not affected by the Change in Circumstances if such
            transfer can be accomplished without material added cost to the
            Lender and in a manner compatible with its operational procedures;
            or

                  (B) If the efforts referred to in (A) above fail to have the
            effect of eliminating the increased cost incurred by the Lender or
            the reduction in the amount of any payment received, the Borrower
            shall, within three (3) Business Days following demand (whether made
            before or after any repayment of the amounts outstanding under this
            Credit Agreement and the Note), pay to the Lender such amount as the
            Lender shall certify to be necessary to compensate the Lender for
            such additional cost or reduction; provided, however, that despite
            such payments, the Lender and the Borrower shall continue to use
            their best efforts to reduce the effect of such Change in
            Circumstance; and

                  (C) At any time thereafter, so long as the Change in
            Circumstance giving rise to the obligation to make the compensating
            payment continues, the Borrower may, upon giving the Lender not less
            than ten (10) Business Days' written notice which shall be
            irrevocable, prepay to the Lender the Loan.

      (c) If any amounts outstanding under this Credit Agreement are to be
prepaid by the Borrower pursuant to any of the provisions of this Section 6.6,
the Borrower shall simultaneously with such prepayment pay to the Lender all
accrued interest and fees on the amounts to be prepaid. No prepayment premium or
penalty shall be due in connection with any payment required by this Section
6.6.

      (d) The certificate of determination of a Lender, as to any matters
referred to in this Section 6.6 shall show in reasonable detail the amount
payable and the calculations used in good faith to determine such amount and
shall, save for any manifest error, be conclusive and binding on the Borrower.

                                       15
<Page>

Section 7. SECURITY.

      7.1 MORTGAGES. The Loan and all other amounts due under this Credit
Agreement shall be secured in accordance with the provisions of the Mortgages.

      7.2 GUARANTY. The Loan and all other amounts due under this Credit
Agreement shall be secured in accordance with the provisions of the Guaranty.

      7.3 FURTHER ASSURANCES. The Borrower agrees to execute and deliver to the
Lender such financing statements or other instruments or documents as the Lender
may reasonably request in order to perfect the security created by the
Mortgages, or otherwise required by this Credit Agreement.

Section 8. CONDITIONS PRECEDENT.

      8.1 DOCUMENTS REQUIRED AS CONDITIONS PRECEDENT TO THE DRAWDOWN OF THE
FIRST ADVANCE. The obligation of the Lender to make the first Advance is subject
to the condition precedent that the Lender shall have received at or prior to
the first Drawdown Date all of the following, each dated on or before the first
Drawdown Date and each in form and substance satisfactory to the Lender.

      (a) The executed Note and the other Loan Documents.

      (b) Certified copies of the resolutions of the Boards of Directors of the
Borrower and the Guarantors authorizing the execution and delivery by the
Guarantors and the Borrower of the Loan Documents to which they are parties and
all documents evidencing other necessary corporate action with respect to the
Loan Documents.

      (c) Certificates of the Secretaries or the Assistant Secretaries of the
Guarantors and the Borrower certifying the names and true signatures of the
officers of the Guarantors and the Borrower authorized to sign the Loan
Documents on behalf of the Guarantors and the Borrower and the other documents
or certificates to be executed by the Guarantors and the Borrower pursuant to
this Credit Agreement.

      (d) Copies certified as of a recent date by the Secretaries or the
Assistant Secretaries of the Guarantors and the Borrower of their By-Laws.

                                       16
<Page>

      (e) Copies of the Guarantors' and the Borrower's Certificates of
Incorporation certified by the relevant officials of their jurisdiction of
incorporation within thirty (30) days from the date of the first Drawdown Date
and certificates dated within thirty (30) days of the first Drawdown Date of the
relevant officials of their jurisdiction of incorporation as to the existence
and good standing of the Guarantors and the Borrower.

      (f) An opinion of Jones, Walker, Waechter, Poitevent, Carrere & Denegre,
counsel to the Guarantors and the Borrower.

      (g) An opinion of Gardere Wynne Sewell, L.L.P., special counsel to the
Lender.

      (h) The Borrower shall have executed and delivered to the Lender copies of
all documents and filings and shall have taken all actions necessary to perfect
the security interests created by the Mortgages as first priority perfected
fleet mortgages on the Vessels.

      (i) All orders, consents, approvals, licenses, authorizations and
validations of, and filings, recordings and registrations with and exemptions by
any Governmental Agency or any Person (other than any routine filings which may
be required after the date hereof with appropriate governmental authorities in
connection with the operation of the Borrower's assets) required to (i)
authorize the execution, delivery and performance by the Borrower and the
Guarantors of the Loan Documents to which they are parties or (ii) prevent the
execution, delivery and performance by the Borrower and the Guarantors of the
Loan Documents to which they are parties from resulting in a breach of any of
the terms or conditions of, or resulting in the imposition of any lien, charge
or encumbrance upon any properties of the Borrower or the Guarantors pursuant
to, or constituting a default (with due notice or lapse of time or both), or
resulting in an occurrence of any event for which any holder or holders of
Indebtedness may declare the same due and payable under, any indenture,
agreement, order, judgment or instrument under which the Borrower or either
Guarantors is a party (other than the Mortgages) or to the Borrower' knowledge
after due inquiry by which the Borrower or the Guarantors or their property may
be bound or affected, or under the Certificates of Incorporation or By-Laws of
the Borrower or the Guarantors, shall have been obtained or made.

      (j) Payment by the Borrower of the fees referred to in Section 9.1 below.

                                       17
<Page>

      (k) There shall have been no material adverse change in the financial
condition of the Borrower or either Guarantors since the financial statements
delivered to the Lender for the period ending March 31, 2001.

      (l) If the first Drawdown Date is not the date hereof, certificates dated
the first Drawdown Date of an officer of the Borrower and the Guarantors,
respectively, certifying that:

            (i) The representations and warranties contained in Section 10 below
      and in Section 7 of the Guaranty are correct on and as of the first
      Drawdown Date as through made on and as of such date except those
      expressly made as of another date; and

            (ii) No event has occurred and is continuing, or would result from
      the first Advance which constitutes an Event of Default or with the
      passing of time or the giving of notice would constitute an Event of
      Default.

      (m) Evidence of the insurances required by Section 11.2 below.

      8.2 ADDITIONAL CONDITIONS PRECEDENT TO SUBSEQUENT ADVANCES. The obligation
of the Lender to make each subsequent Advance shall be subject to the further
condition precedent that the Lender shall have received at or prior to the date
of such subsequent Advance, each dated on or before the date of the subsequent
Advance and each in form and substance satisfactory to the Lender:

      (a) a certificate (dated the date of such Advance) of an officer of the
Borrower and the Guarantors, respectively, certifying that:

            (i) The representations and warranties contained in Section 10 below
      and in Section 7 of the Guaranty are correct on and as of the date such
      Advance is made as though made on and as of such date except those
      expressly made as of another date; and

            (ii) No event has occurred and is continuing, or would result from
      such Advance, which constitutes an Event of Default or with the passing of
      time or the giving of notice would constitute an Event of Default.

      (b) payment by the Borrower of the fees required to be paid on or before
such date by Section 9.1 below.

                                       18
<Page>

      8.3 WAIVER OF CONDITIONS PRECEDENT. All of the conditions precedent
contained in this Section 8 are for the sole benefit of the Lender and the
Lender may waive any or all of them in its absolute discretion.

Section 9. FEES AND EXPENSES.

      9.1 FEES.

      (a) The Borrower shall pay to the Lender a facility fee of USD 68,750 at
or prior to the first Drawdown Date.

      (b) The Borrower shall pay to the Lender a commitment fee of USD 25,000 at
or prior to the first Drawdown Date which fee shall be credited to the facility
fee referred to in Section 9.1(a) above or, if no Advances are made under this
Credit Agreement, shall be non-refundable and shall be in consideration for the
Lender making the revolving credit facility available to the Borrower.

      (c) The Borrower shall pay to the Lender an unused line fee of .25%
payable in arrears on the quarterly anniversaries of the date of this Credit
Agreement based upon the difference between the average daily balance of the
Loan for the most recently ended quarter and the Availability.

      9.2 EXPENSES. The Borrower agrees, whether or not any Advance is made, to
promptly pay or reimburse the Lender upon demand for all reasonable fees and
disbursement of the Lender, including, but not limited to, travel and other
out-of-pocket expenses of the Lender and the reasonable fees and expenses of
external counsel and technical consultants to the Lender, incurred in connection
with (a) the preparation, execution and delivery of the Loan Documents, the
making of Advances under this Credit Agreement and all other documents referred
to herein and any amendments, renegotiation, refinancing or waivers to or
termination of any thereof, (b) the recording, filing and perfection of all
security interests created by the Loan Documents and (c) the protection of the
rights of Lender under this Credit Agreement and all other documents referred to
herein and the enforcement of payment of the Obligations, whether by judicial
proceedings or otherwise.

      9.3 GENERAL INDEMNITY. The Borrower hereby agrees to:

      (a) pay and hold the Lender harmless from and against any and all present
and future stamp and other similar Taxes with respect to the Note and the other
Loan Documents and save the

                                       19
<Page>

Lender harmless from and against any and all liabilities with respect to or
resulting from any delay or omission to pay such Taxes, and will indemnify the
Lender for the full amount of Taxes paid by the Lender in respect of payments
made or to be made hereunder and any liability (including penalties, interest
and expenses) arising therefrom or with respect thereto, whether or not such
Taxes were correctly or legally asserted;

      (b) indemnify the Lender and its officers, directors, employees,
representatives, agents, attorneys and Affiliates (an "Indemnitee") from and
hold each of them harmless against and promptly upon demand pay or reimburse
each of them for, any and all actions, suits, proceedings (including any
investigations, litigation or inquiries), claims, demands and causes of action,
and, in connection therewith, all reasonable costs, losses, liabilities, damages
or expenses of any kind or nature whatsoever (collectively the "Indemnity
Matters") which may be incurred by or asserted against or involve any of them
(whether or not any of them is designated a party thereto) as a result of,
arising out of or in any way related to (i) any actual or proposed use by the
Borrower of the proceeds of the Loan, (ii) the operations of the business of the
Borrower, (iii) the failure of the Borrower to comply with any requirement of
any Government Agency, or (iv) any other aspect of this Credit Agreement, the
Note and the other Loan Documents, including, without limitation, the reasonable
fees and disbursements of counsel and all other expenses incurred in connection
with investigating, defending or preparing to defend any such action, suit,
proceeding (including any investigations, litigation or inquiries) or claim and
including all Indemnity Matters arising by reason of the negligence of any
Indemnitee;

      (c) In the case of any indemnification hereunder, the Lender or other
Person indemnified hereunder shall give notice to the Borrower within a
reasonable period of time of any such claim or demand being made against it and
the Borrower shall have the non-exclusive right to join in the defense against
any such claim or demand provided that if the Borrower provides a defense, the
Indemnitee shall bear its own cost of defense unless there is a conflict of
interest between the Borrower and such Indemnitee.

      (d) No Indemnitee may settle any claim to be indemnified pursuant to this
Section 9.3 without the consent of the indemnitor, such consent not to be
unreasonably withheld; PROVIDED, that the indemnitor may not reasonably withhold
consent to any settlement that an Indemnitee proposes, if the indemnitor does
not have the financial ability to pay all of its

                                       20
<Page>

obligations outstanding and asserted against the Indemnitee at that time,
including the maximum potential claims against the Indemnitee to be indemnified
pursuant to this Section 9.3.

      (e) Notwithstanding anything to the contrary in this Credit Agreement, the
Borrower shall have no indemnity obligation with respect to any Indemnitee
Matter caused by or resulting from the gross negligence or willful misconduct of
the Lender or any other Indemnitee.

      (f) The indemnity and hold harmless contained in this Section 9.3 shall
not extend to the Lender or any other Indemnitee in its or his capacity as an
equity investor in the Borrower or as an owner of any property or interest as to
which the Borrower is also an owner but only to the Lender's capacity as a
lender or a holder of security interests.

      9.4 SURVIVAL. The obligations of the Borrower under this Section 9 shall
survive payment of all other amounts due under this Credit Agreement.

Section 10. REPRESENTATIONS AND WARRANTIES OF BORROWER.

      The Borrower represents and warrants to the Lender as follows:

      10.1 DUE INCORPORATION, QUALIFICATION, ETC. It is a corporation duly
organized, validly existing and in good standing under the laws of the State of
Delaware and is duly qualified and in good standing as a foreign corporation to
do business in the jurisdictions in which the failure to be so qualified would
have a material adverse effect on its business or financial condition, and it
has full corporate power and authority to own its properties and assets and to
conduct its business as presently conducted.

      10.2 CAPACITY. It has full corporate power and authority to execute and
deliver, and to perform and observe the provisions of the Loan Documents to
which it is a party and to carry out the transactions contemplated hereby and
thereby.

      10.3 AUTHORITY AND ENFORCEABILITY. The execution, delivery and performance
by the Borrower of the Loan Documents to which it is a party have been or will
be duly authorized by all necessary corporate action. This Credit Agreement
(including the New York choice of law) constitutes, and the other Loan Documents
to which it is a party constitute, or will constitute, legal, valid and binding
obligations of the Borrower enforceable

                                       21
<Page>

against it in accordance with their respective terms, subject to laws affecting
creditors' rights generally and applicable equitable principles. The Mortgages
shall on the first Drawdown Date create and constitute valid and perfected first
priority ship mortgages on the Vessels, subject to the exceptions contained
therein, enforceable against all third parties, subject to laws affecting
creditors' rights generally and applicable equitable principles, and shall
secure the Loan.

      10.4 GOVERNMENTAL APPROVALS. No order, consent, approval, license,
authorization, or validation of, or filing, recording or registration with
(other than any routine filings which may be required after the date hereof with
appropriate governmental authorities required in connection with the perfection
of the security interests created by any of the Loan Documents), or exemption
by, any Governmental Agency, is required to authorize the execution, delivery
and performance by such Borrower of the Loan Documents to which it is a party.

      10.5 COMPLIANCE WITH OTHER INSTRUMENTS. The execution and delivery of this
Credit Agreement and compliance with its terms, the issuance of the Note and the
execution and delivery of the Mortgages and the compliance with their terms as
contemplated herein, do not result in a breach of any of the terms or conditions
of, or result in the imposition of any lien, charge or encumbrance (except those
contemplated by this Credit Agreement) upon any properties of the Borrower
pursuant to, or constitute a default (with due notice or lapse of time or both),
or result in an occurrence of any event for which any holder or holders of
Indebtedness may declare the same due and payable under any indenture,
agreement, order, judgment or instrument under which the Borrower is a party or
to the Borrower's knowledge, after due inquiry, by which the Borrower or its
property may be bound or affected, or under the Certificate of Incorporation or
By-Laws of the Borrower, and, to the Borrower's knowledge, after due inquiry, do
not violate any provision of applicable law.

      10.6 FINANCIAL STATEMENTS.

      (a) The consolidated balance sheets of the Borrower and the Guarantors as
of March 31, 2001 and the related consolidated statements of income and cash
flow of the Borrower and the Guarantors for the month and year to date period
ended on that date, copies of which have been furnished to the Lender, have been
prepared in accordance with GAAP and fairly present the financial conditions of
the Borrower and the Guarantors as of

                                       22
<Page>

such date and the results of the operations of the Borrower and the Guarantors
for the period ended on such date.

      (b) As of March 31, 2001 the Borrower and the Guarantors have no
contingent liabilities which, if determined adversely to them (either singly or
in the aggregate), would have a material adverse effect.

      10.7 MATERIAL ADVERSE EVENTS. Since March 31, 2001 neither the business,
the prospects, the properties nor the condition (financial or otherwise) of the
Borrower or either Guarantors have been materially adversely affected.

      10.8 LITIGATION, ETC. Except as disclosed in writing to the Lender, there
are no actions, suits or proceedings pending, or to the knowledge of the
Borrower threatened, against or affecting the Borrower or the Guarantors, at law
or in equity which, if adversely determined, would have a material adverse
effect on the Borrower or the Guarantors. To the Borrower's knowledge, as of
March 31, 2001, neither Borrower or the Guarantors was in violation with respect
to any applicable laws or regulations which non-compliance would have a material
adverse effect nor is the Borrower or the Guarantors in violation or default
with respect to any order, writ, injunction, demand or decree of any court or
any Person or in violation or default (nor is there any waiver in effect which,
if not in effect, would result in a violation or default) in any material
respect under any indenture, agreement or other instrument under which the
Borrower or the Guarantors is a party or may be bound, default under which would
have a material adverse effect.

      10.9 PRINCIPAL PLACE OF BUSINESS. The chief executive office and principal
place of business of the Borrower and the Guarantors is located at 2500 CityWest
Boulevard, Suite 2200, Houston, Texas 77042.

      10.10 PATENT AND OTHER RIGHTS. The Borrower and the Guarantors have the
right to use all patents, licenses, trademarks, trade names, trade secrets,
copyrights and all rights with respect thereto, which are required to conduct
their businesses as now conducted without known conflict with the rights of
others which would materially and adversely affect such businesses.

      10.11 TAXES. The Borrower and the Guarantors have filed or caused to be
filed all tax returns which are required to be filed by them, pursuant to the
laws, regulations or orders

                                       23
<Page>

of each Person with taxing power over the Borrower and the Guarantors or their
assets. The Borrower and the Guarantors have paid, or made provision for the
payment of, all Taxes which have or may have become due pursuant to said
returns, or otherwise, or pursuant to any assessment received by the Borrower
and the Guarantors, except such Taxes, if any, as are being contested in good
faith and as to which adequate reserves (determined in accordance with GAAP)
have been provided. The charges, accruals and reserves in respect of Taxes on
the books of the Borrower and the Guarantors are adequate (determined in
accordance with GAAP). There are no proposed material tax assessments against
any Borrower or the Guarantors and no extension of time for the assessment of
federal, state or local Taxes of the Borrower or the Guarantors is in effect or
has been requested.

      10.12 EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974. No Reportable Event
has occurred and is continuing with respect to any Plan.

      10.13 INVESTMENT COMPANY ACT OF 1940. The Borrower is not an "investment
company" within the meaning of the Investment Company Act of 1940.

      10.14 SUBSIDIARIES. The Borrower has no subsidiaries. The Guarantors have
no active subsidiaries other than the Borrower, Horizon Group L.D.C., a Cayman
Island limited duration company, Horizon Offshore Contractors, Ltd., a Cayman
Islands limited liability company, Horizon Offshore Nigeria, Ltd., a Nigerian
corporation and Horizon Subsea Services, Inc., a Delaware corporation.

      10.15 ENVIRONMENTAL COMPLIANCE.

      (a) The Borrower has duly complied in all material respects with, and its
properties and operations are in compliance in all material respects with, the
provisions of all applicable environmental, health and safety laws, codes and
ordinances and all rules and regulations promulgated thereunder of all
Governmental Agencies unless such compliance would violate the laws or
regulations of the jurisdiction in which their properties or operations are
located.

      (b) As of the date of this Credit Agreement, the Borrower has received no
notice from any Governmental Agency, and has no knowledge, of any fact(s) which
constitute a violation of any applicable environmental, health or safety laws,
codes or ordinances, and any rules or regulations promulgated thereunder

                                       24
<Page>

of all Governmental Agencies, which relate to the use or ownership of the
properties owned or operated by the Borrower.

      (c) The Borrower has been issued all required permits, licenses,
certificates and approvals of all Governmental Agencies relating to (i) air
emissions, (ii) discharges to surface water of ground water, (iii) noise
emissions, (iv) solid or liquid waste disposal, (v) the use, generation,
storage, transportation, treatment, recycling or disposal of Hazardous
Substances or (vi) other environmental, health or safety matters necessary for
the ownership or operation of the properties owned or operated by the Borrower
and such permits, licenses, certificates and approvals are in full force and
effect on the date of this Credit Agreement.

      (d) To the best of the Borrower's knowledge, except in accordance with a
valid governmental permit, license, certificate or approval, there has been no
spill or unauthorized discharge or release of any Hazardous Substance to the
environment at, from or as a result of any operations or any of the properties
owned or operated by the Borrower's required to be reported to any Governmental
Agency.

      (e) There has been no material complaint, compliance order, compliance
schedule, notice letter, notice of citation or other similar notice from any
applicable environmental agency which concerns the operations of the properties
owned or operated by the Borrower.

      10.16 INDEBTEDNESS. The Borrower has no indebtedness for borrowed money
other than the Indebtedness hereunder, a loan of approximately USD 42,691,396
under that certain Loan Agreement dated as of December 30, 1998, as amended,
(the "1998 Loan Agreement") among the financial institutions named therein, The
CIT Group/Equipment Financing, Inc., as Agent for such financial institutions,
the Borrower and the Guarantors and a loan of approximately USD 25,000,000 under
that certain loan agreement dated March 26, 2001 (the "Southwest Loan
Agreement") among the Borrower, the Guarantors and Southwest Bank of Texas, N.A.

Section 11. AFFIRMATIVE COVENANTS OF BORROWER.

      Until the payment in full of all amounts due under this Credit Agreement
and the Note by the Borrower, unless compliance shall have been waived by the
Lender, the Borrower and the Guarantors agree that:

                                       25
<Page>

      11.1 FINANCIAL STATEMENTS, REPORTS AND INSPECTION.

      (a) The Borrower and the Guarantors will furnish to the Lender:

            (i) as soon as possible and in any event within two (2) Business
      Days after an officer of the Borrower has knowledge of the occurrence of
      any Event of Default or of any default in the performance of the Loan
      Documents, or any event which with the giving of notice or lapse of time,
      or both, would constitute an Event of Default or such a default, which is
      continuing on the date of such statement, the statement of the chief
      financial officer of the Borrower setting forth the details of such Event
      of Default or event or default and the action which the Borrower proposes
      to take with respect thereto;

            (ii) as soon as available and in any event within forty-five (45)
      days after the close of each quarter of the Parent's fiscal years, a copy
      of quarterly consolidated financial statements for the Parent prepared in
      accordance with GAAP and certified by the chief financial officer or chief
      accounting officer of the Parent together with consolidating statements of
      the Borrower;

            (iii) as soon as available and in any event within ninety (90) days
      after the close of the Parent's fiscal years, a copy of the consolidated
      annual audited financial statements for such year for the Parent certified
      by Arthur Andersen, LLP or other independent public accountants of
      recognized standing acceptable to the Lender;

            (iv) on the fifteenth (15th) day and the last day of each month, a
      barge status report in form and substance satisfactory to the Lender;

            (v) as soon as possible and in any event by December 1 of each year
      an annual business plan for the Borrower for the coming year, including
      projections of expenses and revenues; and

            (vi) (A) as soon as possible, and in any event, within thirty (30)
      days after either the Borrower or the Guarantors know that any Reportable
      Event with respect to any Plan has occurred, a statement of an officer of
      the Borrower or the Guarantors setting forth details as to such Reportable
      Event and the action which the Borrower or the Guarantors propose to take
      with respect thereto, together

                                       26
<Page>

      with a copy of the notice of such Reportable Event given to the Pension
      Benefit Guaranty Corporation if a copy of such notice is available to the
      Borrower or the Guarantors and (B) promptly after receipt thereof a copy
      of any notice relating to a Reportable Event having a material adverse
      effect, the Borrower, or the Guarantors or any member of the Controlled
      Group may receive from the Pension Benefit Guaranty Corporation or the
      Internal Revenue Service with respect to any Plan; PROVIDED, HOWEVER, this
      Section 11.1(a)(vii)(B) shall not apply to notice of general application
      promulgated by the Department of Labor.

      (b) The Borrower or the Guarantors will, upon request, furnish to the
Lender such information as the Lender may reasonably request with respect to the
business, affairs or condition (financial or otherwise) of the Borrower or the
Guarantors and will permit the Lender or its representatives at any reasonable
time or times during normal business hours upon three (3) Business Days' prior
notice, to inspect the properties of the Borrower or the Guarantors, to inspect,
audit and examine the books or records of the Borrower or the Guarantors and to
take extracts therefrom and will reimburse the Lender for all reasonable
expenses incurred in connection therewith.

      (c) Within forty-five (45) days of the close of the first three quarters
of the Parent's fiscal year and on the dates that the annual reports required
pursuant to Section 11.1(a)(iii) above are provided to the Lender, the Parent
shall furnish to the Lender a certificate signed by the chief financial officer
or chief accounting officer of the Guarantors certifying that (A) the
representations and warranties contained in Section 10 of this Credit Agreement
are correct on and as of the date of such certificate as though made on and as
of such date except those expressly made as of another date and (B) the Parent
is in compliance with all of the covenants contained in Sections 12.14, 12.15,
12.16, 12.17 and 12.18 of this Credit Agreement, such certificates showing the
relevant computations for such compliance.

      (d) As soon as possible and in any event within ninety (90) days of the
end of each of the Parent's fiscal years, a certificate from the Parent's
auditors referred to in Section 11.1(a)(iii) above, certifying that (A) such
auditor is not aware of any Events of Default and (B) the Parent is in
compliance with the covenants contained in Sections 12.14, 12.15, 12.16, 12.17
and 12.18 of this Credit Agreement, such certificates showing the relevant
computations for such compliance.

                                       27
<Page>

      11.2 INSURANCE. The Borrower shall insure, or cause to be insured, the
Vessels as required by Article I, Section 15 of the Mortgages.

      11.3 OTHER DEBT. Except for the Indebtedness referred to in Section 10.16
above and the Permitted Liens, the Borrower will promptly pay and discharge any
and all Indebtedness, liens, charges, and all Taxes imposed upon it or upon its
income or profits, or upon any of their properties prior to the date on which
penalties accrue thereon, and lawful claims which, if unpaid, might become a
lien or charge upon the property of the Borrower, except such as may in good
faith be contested or disputed, provided appropriate reserves are maintained in
accordance with GAAP.

      11.4 MAINTENANCE OF EXISTENCE; CONDUCT OF BUSINESS. The Borrower and the
Guarantors will preserve and maintain their corporate existence, their business
as presently conducted, and all of their rights, privileges and franchises
necessary or desirable in the normal conduct of said business, and will conduct
their businesses in an orderly, efficient and regular manner.

      11.5 FINANCIAL RECORDS. The Borrower and the Guarantors will keep books of
record and account in which proper entries will be made of their transactions in
accordance with GAAP.

      11.6 ENVIRONMENTAL COMPLIANCE.

      (a) The Borrower will comply with and will use its best efforts to cause
its agents, contractors and sub-contractors (while such Persons are acting
within the scope of their contractual relationship with the Borrower) to so
comply with (i) all applicable environmental, health and safety laws, codes and
ordinances, and all rules and regulations promulgated thereunder of all
Governmental Agencies and (ii) the terms and conditions of all applicable
permits, licenses, certificates and approvals of all Governmental Agencies now
or hereafter granted or obtained with respect to the properties owned or
operated by the Borrower unless such compliance would violate the laws or
regulations of the jurisdictions in which the properties or operations of the
Borrower are located.

      (b) The Borrower will use its best efforts and safety practices to prevent
the unauthorized release, discharge, disposal, escape or spill of Hazardous
Substances on or about the properties owned or operated by the Borrower.

                                       28
<Page>

      11.7 ENVIRONMENTAL NOTIFICATIONS. The Borrower shall notify the Lender, in
writing, within five (5) Business Days of any of the following events occurring
after the date of this Credit Agreement:

      (a) Any written notification made by the Borrower to any U.S. or foreign
federal, state or local environmental agency required under any federal, state
or local environmental statute, regulation or ordinance relating to a spill or
unauthorized discharge or release of any Hazardous Substance to the environment
at, from, or as a result of any operations on, the properties and operations
owned or operated by the Borrower;

      (b) Knowledge by an officer of the Borrower of receipt of service by the
Borrower of any complaint, compliance order, compliance schedule, notice letter,
notice of violation, citation or other similar notice or any judicial demand by
any U.S. or foreign court, federal, state or local environmental agency,
alleging (i) any spill, unauthorized discharge or release of any Hazardous
Substance to the environment from, or as a result of the operations on, the
properties owned or operated by the Borrower or (ii) violations of applicable
laws, regulations or permits regarding the generation, storage, handling,
treatment, transportation, recycling, release or disposal of Hazardous
Substances on or as a result of operations on the properties and operations
owned or operated by the Borrower.

      (c) It is understood by the parties hereto that the above mentioned
notices are solely for the Lender's information, may not otherwise be required
by any U.S. or foreign federal, state or local environmental laws, regulations
or ordinances, and are to be considered confidential information by the Lender
and the Lenders.

      (d) The term "environmental agency" as used herein shall include, but not
be limited to, the United States Environmental Protection Agency, the United
States Coast Guard, the United States Minerals Management Service, the United
States Department of Transportation (in its administration of the Hazardous
Materials Transportation Act, 49 U.S.C. ss. 1801, ET SEQ.) and other analogous
or similar Governmental Agencies regulating or administering statutes,
regulations or ordinances relating to or imposing liability or standards of
conduct concerning the generation, storage, use, production, transportation,
handling, treatment, recycling, release or disposal of any Hazardous Substance.

                                       29
<Page>

      11.8 ENVIRONMENTAL INDEMNIFICATION.

      (a) The Borrower hereby agrees to indemnify and hold the Indemnitees
harmless from and against any and all claims, losses, liability, damages and
injuries of any kind whatsoever asserted against any Indemnitee with respect to
or as a direct result of the presence, escape, seepage, spillage, release,
leaking, discharge or migration from the properties owned or operated by the
Borrower of any Hazardous Substance, including without limitation, any claims
asserted or arising under any applicable environmental, health and safety laws,
codes and ordinances, and all rules and regulations promulgated thereunder of
all Governmental Agencies, regardless of whether or not caused by or within the
control of the Borrower.

      (b) It is the parties' understanding that neither the Lender nor any other
Indemnitee does now, has never and does not intend in the future to exercise any
operational control or maintenance over of the properties and operations owned
or operated by the Borrower, nor has any of them in the past, presently, or
intends in the future to, maintain an ownership interest in the properties owned
or operated by the Borrower except as may arise upon enforcement of the Lender's
or the Lender's rights under the Mortgages.

      (c) The indemnity and hold harmless contained in this Section 11.8 shall
not extend to the Lender, or any other Indemnitee in its or his capacity as an
equity investor in the Borrower or as an owner of any property or interest as to
which the Borrower are also an owner but only to the Lender's capacity as a
lender or a holder of security interests.

      11.9 SUBORDINATION OF INDEBTEDNESS. Except for indebtedness referred to in
Section 10.16 above, all of the Indebtedness of the Borrower for borrowed money
arising in the future shall be fully subordinated to the Obligations on terms
and conditions acceptable to the Lender.

Section 12. NEGATIVE COVENANTS OF BORROWER. Until the payment in full of all
amounts due under this Credit Agreement and the Note by the Borrower, the
Borrower and the Guarantors agree that they will not without the prior written
consent of the Lender:

      12.1 LIENS. Create, incur, assume or suffer to exist any lien (including
any encumbrance or security interest) of any kind upon any of their other
assets, revenues or right to receive revenue whether now owned or hereafter
acquired, except

                                       30
<Page>

for the liens and other encumbrances set forth below (the "Permitted Liens"):

      (a) liens for Taxes not at the time delinquent or thereafter payable
without penalty or being contested in good faith, provided provision is made to
the extent required by GAAP for the eventual payment thereof in the event it is
found that such are payable by the Borrower;

      (b) liens of carriers, warehousemen, mechanics, materialmen and landlords
incurred in the ordinary course of business for sums not overdue or being
contested in good faith, provided provision is made to the extent required by
GAAP for the eventual payment thereof in the event it is found that such sums
are payable by the Borrower;

      (c) maritime liens:

            (i) arising in the ordinary course of business by operation of law
      that are being contested in good faith by appropriate proceedings and for
      which reserves have been made to the reasonable satisfaction of the Lender
      or

            (ii) arising in connection with salvage and general average; or

            (iii) arising in connection with crew wages claimed but not paid;

      (d) liens incurred in the ordinary course of business in connection with
workmen's compensation, unemployment insurance or other forms of governmental
insurance or benefits, or to secure performance of tenders and statutory
obligations entered into in the ordinary course of business or to secure
obligations on surety or appeal bonds in the ordinary course of business or
easements, rights of way and similar encumbrances incurred in the ordinary
course of business and not interfering with the ordinary conduct of the business
of the Borrower;

      (e) judgment liens in existence less than thirty (30) days after the entry
thereof or with respect to which execution has been stayed or the payment of
which is covered in full by insurance;

      (f) liens required by the terms of this Credit Agreement;

      (g) purchase money security interests in connection with the Indebtedness
referred to in Section 12.5(e) below;

                                       31
<Page>

      (h) liens in favor of The CIT Group/Equipment Financing, Inc., as Agent
pursuant to the 1998 Loan Agreement and any replacements and extensions thereof;

      (i) liens in favor of Southwest Bank of Texas, N.A. pursuant to the
Southwest Loan Agreement and any replacements and extensions thereof; and

      (j) liens securing the Indebtedness referred to in Sections 12.5(h) and
12.5(i) below.

      12.2 LINE OF BUSINESS. Enter into any new line of business unrelated to
their present activities after the date of this Credit Agreement.

      12.3 CONSOLIDATION, MERGER, ETC. Consolidate with or merge with, or sell
(whether in one transaction or in a series of transactions) all or substantially
all of their assets to any Person.

      12.4 MODIFICATION OF AGREEMENTS. Amend, modify or otherwise change any of
the Loan Documents.

      12.5 INDEBTEDNESS. Incur any Indebtedness, except:

      (a) the Advances;

      (b) accounts payable and accrued liabilities incurred in the ordinary
course of business;

      (c) letters of credit, performance and bid bonds obtained by the Borrower
in the ordinary course of their business, up to an aggregate amount of USD
15,000,000.00 at any time;

      (d) supersedeas bonds obtained by the Borrower in the ordinary course of
their business;

      (e) purchase money indebtedness in connection with capital expenditures
permitted by Section 12.26;

      (f) indebtedness to the lenders under the 1998 Loan Agreement and
replacements and extensions thereof;

      (g) indebtedness under the Southwest Loan Agreement and replacements and
extensions thereof;

      (h) indebtedness under an Export-Import Bank of the United States loan
facility with Southwest Bank of Texas, N.A. in an aggregate amount no greater
than USD 15,000,000; and

                                       32
<Page>

      (i) indebtedness secured by liens on vessels and related collateral and
other real and personal property owned by the Borrower, other than the Vessels.

      12.6 REPORTABLE EVENT. Cause or allow to occur a Reportable Event.

      12.7 CHANGE OF LEGAL STRUCTURE. Cause or allow to occur any material
change in their present Certificate of Incorporation or By-Laws adversely
affecting the Lender or change their jurisdiction of incorporation.

      12.8 CHANGE OF PLACE OF BUSINESS. Make any change in the address of their
principal place of business or their chief executive office except upon thirty
(30) days' prior written notice to the Lender.

      12.9 SUBSIDIARIES. Create or acquire any subsidiaries, unless the Borrower
notifies the Lender of the creation or the acquisition of such subsidiary and
such subsidiary, at the Lender's request, guarantees the Borrower's obligations
hereunder in form and substance satisfactory to the Lender.

     12.10 MANAGEMENT OF VESSELS. Subject to Section 12.11 below, change the
flag, class, ownership, management or control of any Vessel.

      12.11 CHARTER. Cause or allow any Vessel to be bareboat chartered to any
Person for a period longer than six (6) months without the prior written consent
of the Lender, which consent shall not be unreasonably withheld.

      12.12 MODIFICATIONS TO VESSELS. Other than the upgrades and modifications
commenced on or before the date of this Agreement, cause or allow any change in
the physical characteristics of any Vessel that would, in the reasonable
judgment of the Lender, materially interfere with the suitability of such Vessel
for normal commercial offshore construction operations; the consent of the
Lender to any such modification not to be unreasonably withheld.

      12.13 SALE OF VESSEL, ETC. Sell, transfer or assign any Vessel, or any
right to receive the revenue from any Vessel provided, however, that:

            (i)   the Borrower and the Guarantors may sell, transfer or assign
                  any surplus or scrap equipment from the Vessels in the
                  ordinary course of

                                       33
<Page>

                  business in an amount of up to USD 500,000.00 annually; and

            (ii)  the Borrower and the Guarantors may sell, transfer or assign
                  any item of equipment from the Vessels if they first replace
                  such items with equipment of equal or greater value.

      12.14 CURRENT RATIO. Permit the Current Ratio to be less than 1.1 to 1 at
any time.

      12.15 WORKING CAPITAL. Permit its consolidated Working Capital to be less
than USD 3,000,000.00 at any time.

      12.16 FIXED CHARGE COVERAGE RATIO. Permit its Fixed Charge Coverage Ratio
to be less than 1.5 to 1.0 on a rolling four quarter basis.

      12.17 DEBT RATIO. Permit its Debt Ratio at any time to be greater than
55%.

      12.18 NET WORTH. Permit its Net Worth to be less than the aggregate of (a)
USD 150,000,000 (b) seventy-five percent (75%) of positive net income for each
fiscal quarter after March 31, 2001, on a cumulative basis, and (c) seventy-five
percent (75%) of the net proceeds of future offerings by the Borrower or the
Guarantors of common stock or other equity of any of them.

      12.19 COMPLIANCE WITH FEDERAL RESERVE BOARD REGULATIONS. No part of the
proceeds of any Advance, will be used, directly or indirectly, for the purpose
of purchasing or carrying any margin security within the meaning of Regulation U
of the Board of Governors of the Federal Reserve System, or for the purpose of
purchasing or carrying or trading in any securities under such circumstances as
to involve the Borrower or the Guarantors in a violation of Regulation X of said
Board or the Lender in a violation of Regulation U of said Board. In particular,
without limitation of the foregoing, neither the Borrower nor the Guarantors
will use any part of the proceeds of any Advance to be made hereunder to acquire
for itself or for any other person any publicly-held securities of any kind. The
assets of the Borrower and the Guarantors do not and will not include any margin
securities, and the Borrower and the Guarantors have no present intention of
acquiring any margin securities. As used in this Section 12.19, the terms
"margin security" and "purpose of purchasing or carrying" shall have the
meanings assigned to them in the aforesaid Regulation U, and the term
"publicly-held", in respect of securities, shall have the

                                       34
<Page>

meaning assigned to it in Section 220.7(a) of Regulation T of said Board. If
requested by the Lender, the Borrower will furnish to the Lender a statement or
statements in conformity with the requirements of Federal Reserve Form U-1
referred to in said Regulation U.

      12.20 LOANS AND INVESTMENTS. Advance funds to, or make investments in,
(whether by way of loan, stock purchase or capital contribution) any Person
other than in Cash Equivalents.

      12.21 CONTRACTS WITH AFFILIATES. Enter into any transaction with any
director, officer, employee, shareholder or Affiliate of the Borrower or the
Guarantors except on terms no less favorable to the Borrower than the Borrower
could obtain in an arms length transaction with Persons not affiliated with the
Borrower.

      12.22 CHANGE OF MANAGEMENT. Cause or allow to occur any material change in
their present executive management.

      12.23 LEASE PAYMENTS. Excluding capitalized leases, incur or pay more than
USD 5,000,000 per year in the aggregate for operating leases or rental of
equipment, vessels or real property having a term in excess of twelve (12)
months, other than rental for their principal place of business referred to in
Section 10.9 above.

      12.24 DIVIDENDS. Allow the Parent to make any dividend payments or other
distributions to its stockholders or redeem or otherwise acquire any of its
stock.

      12.25 FISCAL YEARS. Change or allow to change, the fiscal year of the
Borrower or either Guarantor from one ending on December 31.

      12.26 CAPITAL EXPENDITURES. Incur capital expenditures other than for the
purpose of upgrading marine construction vessels and the acquisition of
equipment and accessories related to such vessels, or other equipment in the
ordinary course of the Borrower's business.

      12.27 USE OF VESSELS. Cause or allow any Vessel to be used outside of the
Gulf of Mexico.

Section 13. EVENTS OF DEFAULT.

      13.1 EVENTS. An "Event of Default" shall exist if any of the following
events shall occur and be continuing:

                                       35
<Page>

      (a) The Borrower shall default in the payment or prepayment when due of
any principal or interest on the Loan or any fees or other amount payable by
them hereunder or under any other Loan Document and such default shall continue
for three (3) Business Days after such amount is due; or

      (b) An Event of Default shall have occurred and be continuing under the
1998 Loan Agreement or the Southwest Loan Agreement; or

      (c) The Borrower or the Guarantors shall default in the payment when due
of any principal of or interest on any of their other Indebtedness in an
aggregate amount in excess of USD 100,000.00; or any event specified in any
note, agreement, indenture or other document evidencing or relating to any such
Indebtedness shall occur if the effect of such event is to cause, or (with the
giving of any notice or the lapse of time or both) to permit the holder or
holders of such Indebtedness (or a trustee or Lender on behalf of such holder or
holders) to cause, such Indebtedness to become due prior to its stated maturity;
or

      (d) Any representation, warranty or certification made or deemed made
herein or in any other Loan Document by the Borrower or the Guarantors or any
certificate furnished to the Lender pursuant to the provisions hereof or any
other Loan Document, shall prove to have been false or misleading as of the time
made or furnished in any material respect; or

      (e) The Borrower or the Guarantors shall fail to perform or observe any
provision of the Loan Documents to which they are parties and such failure shall
continue unremedied for a period of ten (10) Business Days after (i) the failure
arises and (ii) the Borrower or the Guarantors have knowledge of such failure,
or ten (10) Business Days after the Lender gives the Borrower notice of such
failure; or

      (f) The Borrower or the Guarantors shall admit in writing its inability
to, or be generally unable to, pay its debts as such debts become due; or

      (g) The Borrower or the Guarantors shall (i) apply for or consent to the
appointment of, or the taking of possession by, a receiver, custodian, trustee
or liquidator of itself or of all or a substantial part of its property, (ii)
make a general assignment for the benefit of its creditors, (iii) commence a
voluntary case under the U.S. Bankruptcy Code (as now or hereafter in effect),
(iv) file a petition seeking to take advantage of any other law relating to
bankruptcy, insolvency,

                                       36
<Page>

reorganization, winding-up, or composition or readjustment of debts, (v) fail to
controvert in a timely and appropriate manner, or acquiesce in writing to, any
petition filed against it in an involuntary case under the U.S. Bankruptcy Code,
or (vi) take any corporate action for the purpose of effecting any of the
foregoing; or

      (h) A proceeding or case shall be commenced, without the application or
consent of the Borrower or the Guarantors in any court of competent
jurisdiction, seeking (i) its liquidation, reorganization, dissolution or
winding-up, or the composition or readjustment of its debts, (ii) the
appointment of a trustee, receiver, custodian, liquidator or the like of the
Borrower or either Guarantor or of all or any substantial part of the assets of
any of them, or (iii) similar relief in respect of the Borrower or either
Guarantor under any law relating to bankruptcy, insolvency, reorganization,
winding-up, or composition or adjustment of debts, and such proceeding or case
shall continue undismissed, or an order, judgment or decree approving or
ordering any of the foregoing shall be entered and continue unstayed and in
effect, for a period of sixty (60) days; or an order for relief against the
Borrower or either Guarantor shall be entered in an involuntary case under the
U.S. Bankruptcy Code; or

      (i) A judgment for the payment of money in excess of USD 150,000.00 shall
be rendered by a court against any of the Borrower or either Guarantor and the
same shall not be discharged (or provision shall not be made for such
discharge), or a stay of execution thereof shall not be procured, within thirty
(30) days from the date of entry thereof and the Borrower or either Guarantor,
respectively, shall not, within said period of thirty (30) days, or such longer
period during which execution of the same shall have been stayed, appeal
therefrom and cause the execution thereof to be stayed during such appeal; or

      (j) The Guaranty shall cease to be in full force and effect.

THEN, or at any time thereafter, while any such event remains unremedied or
uncured:

      Any declaration made pursuant to this Section 13.1 is subject to the
condition that, if at any time after the outstanding principal of the Note shall
have become due and payable, and before any foreclosure action has been taken by
the Lender under any of the Loan Documents to realize upon the

                                       37
<Page>

security provided by such documents, and all arrears of interest upon the Note
and all other obligations owed to the Lender (except that principal of the Note
which by such declaration shall have become payable) shall have been duly paid,
and every other default and Event of Default shall have been made good waived or
cured, then the Lender may, by written notice to the Borrower, rescind and annul
such declaration and its consequences; but no such rescission or annulment shall
extend to or affect any subsequent default or Event of Default or impair any
right consequent thereon.

Section 14. MISCELLANEOUS.

      14.1 ENTIRE AGREEMENT. This Credit Agreement with its Schedule and
Exhibits embodies the entire agreement and understanding between the parties
hereto and supersedes all prior agreements and understandings relating to the
subject matter hereof.

      14.2 NO WAIVER. No failure to exercise, and no delay in exercising any
right, power or remedy hereunder or under any document delivered pursuant hereto
shall impair any right, power or remedy which the Lender may have, nor shall any
such delay be construed to be a waiver of any of such rights, powers or
remedies, or an acquiescence in any breach or default under this Credit
Agreement or any document delivered pursuant hereto, nor shall any waiver of any
breach or default of the Borrower hereunder be deemed a waiver of any default or
breach subsequently occurring. The rights and remedies herein specified are
cumulative and not exclusive of any rights or remedies which the Lender or the
Lenders would otherwise have.

      14.3 SURVIVAL. All representations, warranties and agreements herein
contained on the part of the Borrower shall survive the making of the Advances
or the issuance of the Letters of Credit hereunder and all such representations,
warranties, and agreements shall be effective as long as any amount arising
pursuant to the terms of this Credit Agreement or the Note remains unpaid.

      14.4 NOTICES.

      (a) All notices, requests, consents, demands, and other communications
provided for or permitted hereunder shall be effective three (3) days after
being duly deposited in the mails, certified, return receipt requested, or upon
receipt if delivered to Federal Express or similar courier company or

                                       38
<Page>

transmitted by telefax, addressed to the respective party at the address set
forth below.

BORROWER AND GUARANTORS:      Horizon Offshore, Inc.
                              Horizon Vessels, Inc.
                              Horizon Offshore Contractors, Inc.
                              2500 CityWest Boulevard, Suite 2200
                              Houston, Texas 77042
                              Attention: Chief Financial Officer
                              Telefax No.: (713) 361-2677

LENDER:                       The CIT Group/Equipment Financing, Inc.
                              1540 Fountainhead Parkway
                              Tempe, Arizona 85282
                              Attention: Vice President - Credit
                              Telefax No.: (480) 858-1489

      14.5 TERMINATION. This Credit Agreement shall terminate when all
obligations of the Borrower incurred under the Loan Documents shall have been
discharged in full.

      14.6 SEVERABILITY OF PROVISIONS. In case any one or more of the provisions
contained in this Credit Agreement should be invalid, illegal or unenforceable
in any respect, the validity, legality and enforceability of the remaining
provisions contained herein shall not in any way be affected or impaired
thereby.

      14.7 SUCCESSORS AND ASSIGNS. This Credit Agreement shall be binding upon
and inure to the benefit of the Borrower and the Lender and their respective
successors and permitted assigns; provided, however, that the Borrower may not
transfer its rights to borrow under this Credit Agreement without the prior
written consent of the Lender.

      14.8 ASSIGNMENT AND PARTICIPATION.

      (a) The Lender shall have the right, provided it complies with all
applicable state and federal securities laws, to assign or grant participation
in all or any portion of the Loan outstanding under this Credit Agreement or the
Note to any affiliate of the Lender or to any foreign, federal or state banking
institution, savings and loan institution or finance company upon thirty (30)
days written notice to the Borrower of such assignment or participation.

                                       39
<Page>

      (b) The Borrower hereby agrees to assist with any assignment or
participation made pursuant to this Section 14.8 by executing and delivering any
documents or instruments reasonably requested by the Lender in connection with
any such assignment, including but not limited to, amendments to this Credit
Agreement, consents to assignments or new promissory notes.

      14.9 COUNTERPARTS. This Credit Agreement may be executed in any number of
counterparts, all of which taken together shall constitute one agreement, and
any party hereto may execute this Credit Agreement by signing any such
counterpart.

      14.10 JURISDICTION. ALL ACTIONS OR PROCEEDINGS WITH RESPECT TO THIS CREDIT
AGREEMENT AND THE NOTE MAY BE INSTITUTED IN THE COURTS OF THE STATE OF NEW YORK
OR THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW YORK. BY
EXECUTION AND DELIVERY OF THIS CREDIT AGREEMENT THE LENDER THE BORROWER AND THE
GUARANTORS IRREVOCABLY AND UNCONDITIONALLY SUBMIT TO THE JURISDICTION OF EACH
SUCH COURT, AND IRREVOCABLY AND UNCONDITIONALLY WAIVE (i) ANY OBJECTION THE
BORROWER, THE GUARANTORS, THE LENDER MAY NOW OR HEREAFTER HAVE TO THE LAYING OF
VENUE IN ANY OF SUCH COURTS, AND (ii) ANY CLAIMS THAT ANY ACTION OR PROCEEDING
BROUGHT IN ANY OF SUCH COURTS HAS BEEN BROUGHT IN AN INCONVENIENT FORUM.
PROVIDED, HOWEVER, THAT NOTHING IN THIS SECTION 14.10 SHALL LIMIT OR RESTRICT
THE RIGHT OF THE LENDER TO BRING SUIT AGAINST THE BORROWER OR THE GUARANTORS
ANYWHERE IN THE WORLD TO ENFORCE THE SECURITY PROVIDED IN THE SECURITY
AGREEMENT.

      14.11 CHOICE OF LAW. THIS CREDIT AGREEMENT AND THE NOTE ISSUED HEREUNDER
AND ALL ISSUES ARISING IN CONNECTION WITH THIS CREDIT AGREEMENT AND THE
TRANSACTIONS CONTEMPLATED HEREBY SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK, EXCEPT THAT WITH
RESPECT TO THE PROVISIONS OF THIS CREDIT AGREEMENT AND THE NOTE WHICH PROVIDE
FOR OR RELATE TO THE PAYMENT OF INTEREST, PROVISIONS OF APPLICABLE FEDERAL LAW
WHICH PERMIT THE LENDER TO CHARGE THE HIGHER OF THE RATE PERMITTED BY SUCH
APPLICABLE LAW OR BY THE LAWS OF THE STATE IN WHICH THE LENDER IS LOCATED SHALL
BE DEEMED GOVERNING AND CONTROLLING.

      14.12 WAIVER OF JURY TRIAL. THE BORROWER, THE GUARANTORS AND THE LENDER
HEREBY WAIVE THE RIGHT TO TRIAL BY JURY IN ANY JUDICIAL PROCEEDING TO WHICH THEY
ARE PARTIES INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER (WHETHER SOUNDING IN
TORT, CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT, RELATED

                                       40
<Page>

TO, OR CONNECTED WITH THIS CREDIT AGREEMENT, ANY OF THE LOAN DOCUMENTS OR THE
RELATIONSHIP ESTABLISHED HEREUNDER.

      14.13 AMENDMENT AND WAIVER. Except as otherwise provided herein, no
provision of this Credit Agreement may be amended, modified, supplemented,
changed, waived, discharged or terminated, unless all parties hereto consent in
writing.

      14.14 NO ORAL AGREEMENTS. THIS WRITTEN CREDIT AGREEMENT WITH ITS SCHEDULE
AND EXHIBITS REPRESENTS THE FINAL AGREEMENT AMONG THE PARTIES CONCERNING THE
SUBJECT MATTER HEREOF AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.

      14.15 HEADINGS, ETC. The table of contents of this Credit Agreement and
the headings of various sections and subsections herein are for convenience of
reference only and shall not modify, define, expand or limit any of the terms or
provisions hereof. References to sections or subsections without reference to
the document in which they are contained are references to this Credit
Agreement.

      14.16 TAXES. Any Taxes payable or ruled payable by any Government Agency
in respect of this Credit Agreement, the Note or any other Loan Document, other
than any Tax on or measured by the income of the Lender, shall be paid by the
Borrower, together with any interest and penalties.

      14.17 CONTROLLING AGREEMENT. In the event of a conflict between the
provisions of this Credit Agreement and those of any other Loan Document, the
provisions of this Credit Agreement shall control.

                                       41
<Page>

      IN WITNESS WHEREOF, the parties hereto have caused this Credit Agreement
to be executed as of the day and year first above written.

                                    HORIZON VESSELS, INC.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Sharp
                                    Title: Executive Vice President

                                    HORIZON OFFSHORE CONTRACTORS, INC.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Sharp
                                    Title: Executive Vice President

                                    HORIZON OFFSHORE, INC.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Sharp
                                    Title: Executive Vice President

                                    THE CIT GROUP/EQUIPMENT FINANCING, INC.

                                    By:_______________________________________
                                    Name:_____________________________________
                                    Title:____________________________________

                                    By:_______________________________________
                                    Name:_____________________________________
                                    Title:____________________________________

                                       42
<Page>

                                                                    EXHIBIT A TO
                                                                CREDIT AGREEMENT

                                 PROMISSORY NOTE

USD 27,500,000.00                                                   May 10, 2001

      FOR VALUE RECEIVED, HORIZON VESSELS, INC., a corporation organized and
existing under the laws of the State of Delaware (the "Borrower") hereby
promises to pay to The CIT GROUP/ EQUIPMENT FINANCING, INC. (the "Payee"), or
order, on or before May 10, 2004, or otherwise, as hereinafter provided, TWENTY
SEVEN MILLION FIVE HUNDRED THOUSAND AND NO/100 DOLLARS OF THE UNITED STATES OF
AMERICA (USD 27,500,000.00) or such lesser principal amount as may be
outstanding hereunder and to pay interest on the unpaid portion of said
principal sum outstanding from time to time, as hereinafter provided.

                             PRINCIPAL AND INTEREST

      1.1 (a) Interest on this Note shall be payable at the times and the rates
as provided in Section 5 of the Credit Agreement (the "Credit Agreement") dated
as of May 10, 2001, among the Borrower, Horizon Offshore Contractors, Inc.,
Horizon Offshore, Inc., and the Payee.

      (b) In case any payment of principal or interest is not paid when due,
additional interest at the rate determined as provided in Section 5.3 of the
Credit Agreement shall be payable on all overdue principal and, to the extent
that the same may be lawful, on all overdue interest.

      1.2 Interest shall be calculated on the outstanding principal amounts as
provided in Section 5.1(b) of the Credit Agreement.

      1.3 The principal of this Note shall be payable as provided in Section 6.2
of the Credit Agreement.

      1.4 Notwithstanding any provision of this Note to the contrary, in no
event shall the aggregate amount of consideration which constitutes interest
under any applicable law which is contracted for, charged or received hereunder
or under this Note ("Interest") exceed the maximum amount of nonusurious
interest allowed by law, and any excess shall be credited on this Note (or if
all obligations under this Note shall have been paid in full, refunded to the
Borrower). For purposes of the foregoing, the maximum amount of interest

                                       1
<Page>

allowed by law shall be calculated by determining the amount of interest that
could be contracted for, charged or received during the term hereof at the
maximum rate of nonusurious interest allowed from time to time by applicable law
as is now or, to the extent allowed by law, as may hereafter be in effect (the
"maximum nonusurious interest rate") and, if at any time the rate of Interest to
accrue would exceed the maximum nonusurious interest rate, the rate of Interest
to accrue under this Note shall be limited to the maximum nonusurious interest
rate, but any subsequent reductions in the Governing Rate (as defined in the
Credit Agreement) shall not reduce the rate of Interest to accrue on this Note
below the maximum nonusurious interest rate until the total amount of Interest
accrued and paid on this Note equals the amount of Interest which could have
accrued if a rate per annum equal to the Governing Rate plus 2.90% had at all
times been in effect.

                                    SECURITY

      2.1 This Note is issued under and pursuant to the Credit Agreement and is
secured by, among other things, U.S. and Vanuatu First Preferred Fleet Mortgages
on six (6) vessels owned by the Borrower (the "Mortgages"). Reference is hereby
made to the Credit Agreement and the Mortgages for a description of the property
thereby mortgaged, the nature and extent of the security afforded thereby and
the rights of the Borrower and the Payee with respect to such security as
provided in the Mortgages. Payment of this Note may be demanded by the holder
hereof prior to the maturity of this Note under certain circumstances and
conditions, in the manner, and with the effect, provided in the Credit
Agreement.

      2.2 This Note evidences the Advances made by the Lender under the Credit
Agreement.

                                  MISCELLANEOUS

      3.1 All parties hereto, including endorsers hereof, hereby waive
presentment for payment, demand, protest and notice of protest and non-payment
hereof and hereby consent that any and all securities or other property, if any,
held by or for the holders hereof at any time as security for this Note may be
exchanged, released or surrendered and that the time of payment of this Note may
be extended, all in the sole discretion of the holder hereof and without notice
and without affecting in any manner the liability of the parties hereto.

      3.2 No course of dealing between the Borrower and the

                                       2
<Page>

Payee in exercising any rights hereunder shall operate as a waiver of any right
of any holder except to the extent expressly waived in writing by such holder.

      3.3 Whenever any payment to be made hereunder shall be due on a day which
is not a Business Day, the due date thereof shall be extended to the next
succeeding Business Day; provided, however, that if such next succeeding
Business Day is in a new calendar month, then the payment required hereunder
shall be made on the last Business Day preceding the original date on which
payment was due. If a payment of principal has been extended pursuant to this
Section 3.3, interest shall be payable on such principal at the applicable rate
during such extension.

      3.4 Any notice to be given pursuant to this Note shall be given in
accordance with Section 14.4 of the Credit Agreement.

      3.5 THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
INTERNAL LAWS OF THE STATE OF NEW YORK EXCEPT THAT WITH RESPECT TO THE
PROVISIONS OF THIS NOTE WHICH PROVIDE FOR OR RELATE TO THE PAYMENT OF INTEREST,
ANY PROVISIONS OF APPLICABLE FEDERAL LAW WHICH PERMIT THE PAYEE TO CHARGE THE
HIGHER OF THE RATE PERMITTED BY SUCH APPLICABLE LAW OR BY THE LAWS OF THE STATE
IN WHICH THE PAYEE IS LOCATED SHALL BE DEEMED GOVERNING AND CONTROLLING.

      3.6 THE BORROWER HEREBY WAIVES TRIAL BY JURY IN ANY JUDICIAL PROCEEDING TO
WHICH IT IS A PARTY INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER (WHETHER
SOUNDING IN TORT, CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT OF, RELATED TO,
OR CONNECTED WITH THIS NOTE OR ANY OF THE LOAN DOCUMENTS.

      3.7 Capitalized terms used in this Note but not defined herein shall have
the meanings given to them in the Credit Agreement.

      IN WITNESS WHEREOF, the Borrower has caused this Note to be duly executed
the day and year first above written.

                                       3
<Page>

                                    HORIZON VESSELS, INC.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Sharp
                                    Title: Executive Vice President

                                       4
<Page>

                                                                    EXHIBIT B TO
                                                                CREDIT AGREEMENT

                              HORIZON VESSELS, INC.
                       HORIZON OFFSHORE CONTRACTORS, INC.
                         2500 CITYWEST BLVD., SUITE 2200
                              HOUSTON, TEXAS 77042

                                   ----------

The CIT Group/Equipment Financing, Inc.
1540 West Fountainhead
Tempe, Arizona  85282

                              REQUEST FOR BORROWING

Dear Sirs:

      Pursuant to Section 4.1(c) of the of the Credit Agreement dated as of May
10, 2001 (the "Loan Agreement") among you as the Lender, the undersigned as the
Borrower and Horizon Offshore, Inc. and Horizon Offshore Contractors, Inc., we
hereby irrevocably request that you make an Advance under the Credit Agreement
and, in that connection set forth below is the information relating to such
Advance;

      (i)   the date of the proposed Advance is ___________.
      (ii)  the amount of the proposed Advance is USD ______________.
      (iii) the amount of the proposed Advance should be wire transferred as
            follows:

      Frost National Bank
      100 W. Houston Street
      San Antonio, Texas
      Horizon Vessels, Inc.
      ABA No.: 114000093
      Account No.: ____________

                                       5
<Page>

      If the borrowing requested above fails to take place or is delayed because
any of the conditions precedent specified in Section 8 of the Credit Agreement
have not been satisfied, the undersigned hereby agrees to indemnify you against
any loss incurred as a result of the giving of this Request for Borrowing
including without limitation, any loss resulting from actions taken by you to
fund the requested Advance but excluding any loss resulting from your gross
negligence or willful misconduct. We further agree that a certificate from you
stating in reasonable detail the amount of, and basis for, any such loss
incurred by you shall be conclusive as to such loss, absent manifest error.

      All capitalized terms used in this Request for Borrowing and not defined
herein shall have the meanings given to them in the Credit Agreement.

                              Very truly yours,

                              HORIZON VESSELS, INC.

                              By:__________________________
                                 Name: David W. Sharp
                                 Title: Executive Vice President

                                       6Prepared by MERRILL CORPORATION

QuickLinks
 -- Click here to rapidly navigate through this document

Exhibit 10.4.1  

 
 

ABGENIX, INC.    
  

 
  1998 DIRECTOR OPTION PLAN
  (As Amended and Restated Effective April 26, 2001)    
  

    1.  Purposes of the Plan.  The purposes of this 1998 Director Option Plan are to attract and retain the
best available personnel for service as Outside Directors (as defined herein) of the Company, to provide additional incentive to the Outside Directors of the Company to serve as Directors, and to
encourage their continued service on the Board. 

    All
options granted hereunder shall be nonstatutory stock options. 

    2.  Definitions.  As used herein, the following definitions shall apply: 

    (a) "Board" means the Board of Directors of the Company. 

    (b) "Code" means the Internal Revenue Code of 1986, as amended. 

    (c) "Common Stock" means the Common Stock of the Company. 

    (d) "Company" means Abgenix, Inc., a Delaware corporation. 

    (e) "Director" means a member of the Board. 

    (f)  "Employee" means any person, including officers and Directors, employed by the Company or any Subsidiary of the
Company. Employees of the Parent of the Company shall not be employees of the Company unless they are also employed by the Company. The payment of a Director's fee by the Company shall not be
sufficient in and of itself to constitute "employment" by the Company. 

    (g) "Exchange Act" means the Securities Exchange Act of 1934, as amended. 

    (h) "Fair Market Value" means, as of any date, the value of Common Stock determined as follows: 

     (i) If
the Common Stock is listed on any established stock exchange or a national market system, including with limitation the Nasdaq National Market or the Nasdaq
SmallCap Market of the Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for such stock (or the closing bid, if no sales were reported, as quoted on such exchange or system
for the market trading day at the time of determination, or if the determination is not made on a market trading date, the last market trading day prior to the time of determination) as reported in
The Wall Street Journal or such other source as the Administrator deems reliable; 

    (ii) If
the Common Stock is regularly quoted by a recognized securities dealer but selling prices are not reported, the Fair Market Value of a Share of Common Stock
shall be the mean between the high bid and low asked prices for the Common Stock on the date of determination, as reported in t) as reported in the The Wall Street Journal or such other source
as the Board deems reliable, or; 

    (iii) In
the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Board. 

    (i)  "Inside Director" means a Director who is an Employee. 

    (j)  "New Outside Director" means an Outside Director who becomes a Director after the effective date of the Plan, as
amended and restated. 

    (k) "Option" means a stock option granted pursuant to the Plan. 

 

    (l)  "Optioned Stock" means the Common Stock subject to an Option. 

    (m) "Optionee" means a Director who holds an Option. 

    (n) "Outside Director" means a Director who is not an Employee. 

    (o) "Parent" means a " parent corporation," whether now or hereafter existing, as defined in Section 424(e) of
the Code. 

    (p) "Plan" means this 1998 Director Option Plan. 

    (q) "Share" means a share of the Common Stock, as adjusted in accordance with Section 10 of the Plan. 

    (r) "Subsidiary" means a "subsidiary corporation," whether now or hereafter existing, as defined in
Section 424(f) of the Internal Revenue Code of 1986. 

    3.  Stock Subject to the Plan.  Subject to the provisions of Section 10 of the Plan, the maximum
aggregate number of shares which may be optioned and sold under under the Plan is 250,000 Shares of Common Stock (the "Pool"). The Shares may be authorized, but unissued, or reacquired Common Stock. 

    If
an Option expires or becomes unexercisable without having been exercised in full, the unpurchased Shares which were subject thereto shall become available for future grant or sale
under the Plan (unless the Plan has terminated). Shares that have actually been issued under the Plan shall not be returned to the Plan and shall not become available for future distribution under the
Plan. 

    4.  Administration and Grants of Options under the Plan.  

    (a)  Procedure for Grants.  All grants of Options to Outside Directors under this Plan shall be automatic
and nondiscretionary and shall be made strictly in accordance with the following provisions: 

     (i) No
person shall have any discretion to select which Outside Directors shall be granted Options or to determine the number of Shares to be covered by Options granted
to Outside Directors except as expressly provided by the Plan. 

    (ii) Each
New Outside Director shall be automatically granted an Option to purchase that number of Shares as shall be determined by the Board in its sole discretion
(the "First Option") on the date on which such person first becomes an Outside Director, whether through election by the stockholders of the Company or appointment by the Board to fill a vacancy;
provided, however, that an Inside Director who ceases to be an Inside Director but who remains a Director shall not receive a First Option. If the Board does not establish the number of Shares subject
to the First Option for a given New Outside Director prior to the date of grant for such First Option, then the number shall be the same as the number of Shares granted to the immediately preceding
New Outside Director. 

    (iii) Commencing
with the fiscal year beginning January 1, 2002, each Outside Director shall be automatically granted an Option to purchase that number of Shares
as shall be determined by the Board in its sole discretion (a "Subsequent Option") on the date of the Company's Annual Meeting of Stockholders upon such Outside Director's reelection, if on such date,
he or she shall have served on the Board for at least six (6) months. If the Board does not establish the number of Shares subject to the Subsequent Option for a given fiscal year, then the
number shall be the same as the number of Shares subject to the Subsequent Option for the immediately preceding fiscal year (as adjusted pursuant to Section 10). 

    (iv) Notwithstanding
the provisions of subsections (ii) and (iii) hereof, any exercise of an Option granted before the Company has obtained stockholder
approval of the Shares to be 

2

 

issued upon the exercise of such Option shall be conditioned upon obtaining such stockholder approval. 

    (v) The
terms of a First Option granted hereunder shall be as follows: 

    (A) the
maximum term of a First Option shall be ten (10) years. 

    (B) the
First Option shall be exercisable only while the Outside Director remains a Director of the Company, except as set forth in Sections 8 and 10 hereof. 

    (C) the
exercise price per Share shall be 100% of the Fair Market Value per Share on the date of grant of the First Option. In the event that the date of grant of the
First Option is not a trading day, the exercise price per Share shall be the Fair Market Value on the next trading day immediately following the date of grant of the First Option. 

    (D) subject
to Section 10 hereof, the First Option shall be exercisable immediately, in whole or in part. 

    (vi) The
terms of a Subsequent Option granted hereunder shall be as follows: 

    (A) the
maximum term of the Subsequent Option shall be ten (10) years. 

    (B) the
Subsequent Option shall be exercisable only while the Outside Director remains a Director of the Company, except as set forth in Sections 8 and 10 hereof. 

    (C) the
exercise price per Share shall be 100% of the Fair Market Value per Share on the date of grant of the Subsequent Option. In the event that the date of grant of
the Subsequent Option is not a trading day, the exercise price per Share shall be the Fair Market Value on the next trading day immediately following the date of grant of the Subsequent Option. 

    (D) subject
to Section 10 hereof, the Subsequent Option shall be exercisable immediately, in whole or in part. 

    (vii) In
the event that any Option granted under the Plan would cause the number of shares subject to outstanding Options plus the number of Shares previously purchased
under Options to exceed the Pool, then the remaining Shares available for Options grant shall be granted under Options to the Outside Directors on a pro rata basis. No further grants shall be made
until such time, if any, as additional Shares become available for grant under the Plan through action of the Board or the stockholders to increase the number of Shares which may be issued under the
Plan or through cancellation or expiration of Options previously granted hereunder. 

    5.  Eligibility.  Options may be granted only to Outside Directors. All Options shall be automatically
granted in accordance with the terms set forth in Section 4 hereof. 

    The
Plan shall not confer upon any Optionee any right with respect to continuation of service as a Director or nomination to serve as a Director, nor shall it interfere in any way
with any rights which the Director or the Company may have to terminate the Director's relationship with the Company at any time. 

    6.  Term of Plan.  The Plan shall become effective upon the earlier to occur of its adoption by the
Board or its approval by the stockholders of the Company as described in Section 16 of the Plan. It shall continue in effect for a term of ten (10) years ending in 2008 unless sooner
terminated under Section 11 of the Plan. 

    7.  Form of Consideration.  The consideration to be paid for the Shares to be issued upon exercise of an
Option, including the method of payment, shall consist of (i) cash, (ii) check, (iii) other shares 

3

 

which (x) in the case of Shares acquired upon exercise of an Option, have been owned by the Optionee for more than six (6) months on the date of surrender, and (y) have a Fair
Market Value on the date of surrender equal to the aggregate exercise price of the Shares as to which said Option shall be exercised, (iv) delivery of a properly executed notice together with
such other documentation as the Company and the broker, if applicable, shall require to effect an exercise of the Option and delivery to the Company of the sale or loan proceeds required to pay the
exercise price, or (v) any combination of the foregoing methods of payment. 

    8.  Exercise of Option.  

    (a)  Procedure for Exercise, Rights as a Stockholder.  Any Option granted hereunder shall be exercisable
at such times as are set forth in Section 4 hereof and in accordance with the schedule set forth in the agreement documenting an individual Option. 

    An
Option may not be exercised for a fraction of a Share. 

    An
Option shall be deemed to be exercised when written notice of such exercise has been given to the Company in accordance with the terms of the Option by the person entitled to
exercise the Option and
full payment for the Shares with respect to which the Option is exercised has been received by the Company. Full payment may consist of any consideration and method of payment allowable under
Section 7 of the Plan. Until the issuance (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company) of the stock certificate
evidencing such Shares, no right to vote or receive dividends or any other rights as a stockholder shall exist with respect to the Optioned Stock, notwithstanding the exercise of the Option. A share
certificate for the number of Shares so acquired shall be issued to the Optionee as soon as practicable after exercise of the Option. No adjustment shall be made for a dividend or other right for
which the record date is prior to the date the stock certificate is issued, except as provided in Section 10 of the Plan. 

    Exercise
of an Option in any manner shall result in a decrease in the number of Shares which thereafter may be available, both for purposes of the Plan and for sale under the Option,
by the number of Shares as to which the Option is exercised. 

    (b)  Termination of Continuous Status as a Director.  Subject to Section 10 hereof, in the event
an Optionee's status as a Director terminates (other than upon the Optionee's death or disability), the Optionee may exercise his or her Option, but only within ninety (90) days following the
date of such termination, and only to the extent that the Optionee was entitled to exercise it on the date of such termination (but in no event later than the expiration of its ten (10) year
term); provided, however, that in the event that a sale of the Option Stock received upon exercise of this Option would subject the Director to liability under Section 16(b) of the Securities
and Exchange Act of 1934, as amended, then the option will terminate on the earlier of (i) fifteenth day after the last date upon which such sale would result in liability, or (ii) two
hundred ten (210) days following the date of such termination of status as a Director (but in no event later than the expiration of its ten (10) year term). To the extent that the
Optionee was not entitled to exercise an Option on the date of such termination, and to the extent that the Optionee does not exercise such Option (to the extent otherwise so entitled) within the time
specified herein, the Option shall terminate. 

    (c)  Disability of Optionee.  In the event Optionee's status as a Director terminates as a result of
disability, the Optionee may exercise his or her Option, but only within twelve (12) months following the date of such termination, and only to the extent that the Optionee was entitled to
exercise it on the date of such termination (but in no event later than the expiration of its ten (10) year term). To the extent that the Optionee was not entitled to exercise an Option on the
date of the time specified herein, the Option shall terminate. 

4

 

    (d)  Death of Optionee.  In the event of an Optionee's death, the Optionee's estate or a person who
acquired the right to exercise the Option by bequest or inheritance may exercise the Option, but only within twelve (12) months following the date of death, and only to the extent that the
Optionee was entitled to exercise it on the date of death (but in no event later than the expiration of its ten (10) year term). To the extent that the Optionee was not entitled to exercise an
Option on the date of death, and to the extent that the Optionee's estate or a person who acquired the right to exercise such Option
does not exercise such Option (to the extent otherwise so entitled) within the time specified herein, the Option shall terminate. 

    9.  Non-Tranferability of Options.  The Option may not be sold, pledged, assigned,
hypothecated, transferred, or disposed of in any manner other than by will or by the laws of descent or distribution and may be exercised, during the lifetime of the Optionee, only by the Optionee. 

    10.  Adjustments Upon Changes in Capitalization, Dissolution, Merger or Asset Sale.  

    (a)  Changes in Capitalization.  Subject to any required action by the stockholders of the Company, the
number of Shares covered by each outstanding Option, the number of Shares which have been authorized for issuance under the Plan but as to which no Options have yet been granted or which have been
returned to the Plan upon cancellation or expiration of an Option, as well as the price per Share covered by each such outstanding Option, and the number of Shares issuable pursuant to the grant
provisions of Section 4 hereof shall be proportionately adjusted for any increase or decrease in the number of issued Shares resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or decrease in the number of issued Shares effected without receipt of consideration by the Company; provided, however, that
conversion of any convertible securities of the Company shall not be deemed to have been "effected without receipt of consideration." Except as expressly provided herein, no issuance by the Company of
shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of
Shares subject to an Option. 

    (b)  Dissolution or Liquidation.  In the event of the proposed dissolution or liquidation of the
Company, to the extent that an Option has not been previously exercised, it shall terminate immediately prior to the consummation of such proposed action. 

    (c)  Merger or Asset Sale.  In the event of a merger or consolidation of the Company with or into another
corporation or the sale of substantially all of the assets of the Company, outstanding Options may be assumed or equivalent options may be substituted by the successor corporation or a Parent or
Subsidiary thereof (the "Successor Corporation"). If an Option is assumed or substituted for, the Option or equivalent option shall continue to be exercisable as provided in Section 4 hereof
for so long as the Optionee serves as a Director or a director of the Successor Corporation. Following such assumption or substitution, if the Optionee's status as a Director or director of the
Successor Corporation, as applicable, is terminated other than upon a voluntary resignation by the Optionee, the Option or option shall become fully exercisable, including as to Shares for which it
would not otherwise be exercisable. Thereafter, the Option or option shall remain exercisable in accordance with Sections 8(b) through (d) above. 

    If
the Successor Corporation does not assume an outstanding Option or substitute for it an equivalent option, the Option shall become fully vested and exercisable, including as to
Shares for which it would not otherwise be exercisable. In such event the Board shall notify the Optionee that the Option shall be
fully exercisable for a period of thirty (30) days from the date of such notice, and upon the expiration of such period the Option shall terminate. 

    For
purposes of this Section 10(c), an Option shall be considered assumed if, following the merger, consolidation or sale of assets, the Option confers the right to purchase or
receive, for 

5

 

each Share of Optioned Stock subject to the Option immediately prior to the merger, consolidation or sale of assets, the consideration (whether stock, cash, or other securities or property) received
in the merger, consolidation or sale of assets by holders of Common Stock for each Share held on the effective date of the transaction (and if holders were offered a choice of consideration, the type
of consideration chosen by the holders of a majority of the outstanding Shares). If such consideration received in the merger, consolidation or sale of assets is not solely common stock of the
successor corporation or its Parent, the Administrator may, with the consent of the successor corporation, provide for the consideration to be received upon the exercise of the Option, for each Share
of Optioned Stock subject to the Option, to be solely common stock of the successor corporation or its Parent equal in fair market value to the per share consideration received by holders of Common
Stock in the merger, consolidation or sale of assets. 

    11.  Amendment and Termination of the Plan.  

    (a)  Amendment and Termination.  Except as set forth in Section 4, the Board may at any time
amend, alter, suspend, or discontinue the Plan, but no amendment, alteration, suspension or discontinuation shall be made which would impair the rights of any Optionee under any grant theretofore
made, without his or her consent. In addition, to the extent necessary and desirable to comply with any applicable law or regulation, the Company shall obtain stockholder approval of any Plan
amendment in such manner and to such a degree as required. 

    (b)  Effect of Amendment or Termination.  Any such amendment or termination of the Plan shall not affect
Options already granted and such Options shall remain in full force and effect as if this Plan had not been amended or terminated. 

    12.  Time of Granting Options.  The date of grant of an Option shall, for all purposes, be the date
determined in accordance with Section 4 hereof. 

    13.  Conditions Upon Issuance of Shares.  Shares shall not be issued pursuant to the exercise of an
Option unless the exercise of such Option and the issuance and delivery of such Shares pursuant thereto shall comply with all relevant provisions of law, including, without limitation, the Securities
Act of 1933, as
amended, the Exchange Act, the rules and regulations promulgated thereunder, state securities laws, and the requirements of any stock exchange upon which the Shares may then be listed, and shall be
further subject to the approval of counsel for the Company with respect to such compliance. 

    As
a condition to the exercise of an Option, the Company may require the person exercising such Option to represent and warrant at the time of any such exercise that the Shares are
being purchased only for investment and without any present intention to sell or distribute such Shares, if, in the opinion of counsel for the Company, such representation is required by any of the
aforementioned relevant provisions of law. 

    Inability
of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company's counsel to be necessary to the lawful issuance
and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell such Shares as to which such requisite authority shall not have been obtained. 

    14.  Reservation of Shares.  The Company, during the term of this Plan, will at all times reserve and
keep available such number of Shares as shall be sufficient to satisfy the requirements of the Plan. 

    15.  Option Agreement.  Options shall be evidenced by written option agreements in such form as the Board
shall approve. 

6

QuickLinks

ABGENIX, INC.

1998 DIRECTOR OPTION PLAN (As Amended and Restated Effective April 26, 2001)

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}]]