Document:

<PAGE>

                                                                   Exhibit 10.5

                              COMMISSION AGREEMENT

This Commission Agreement (this "Agreement") is entered into as of the 1st day
of April 2000 between BASSOE OFFSHORE (USA), INC. ("Agent"), and CHILES OFFSHORE
LLC ("Company").

WHEREAS, Company is the charterer of the "TONALA" (the "Vessel") a jackup mobile
offshore drilling unit owned by Perforadora Central, S.A. de C.V.
("Perforadora"), pursuant to that certain Bareboat Charter Agreement (the
"Charter") dated November 30, 1999, between Company and Perforadora;

WHEREAS, Company and Agent desire to memorialize their agreement for payment of
commissions to Agent for its services in execution of the Charter for the Vessel
on behalf of the Company, upon the terms contained herein.

NOW, THEREFORE, in consideration of the premises and the covenants contained
herein, and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged by the parties, Company and Agent agree as
follows:

     1.   APPOINTMENT: Company hereby appoints Agent with respect to the Charter
          in connection with the Vessel.

     2.   COMMISSIONS: Company shall pay Agent a commission equal to 2% of the
          "Net Operating Margin" (as defined in the Charter) received by Company
          in connection with contracts entered into by Company (the
          "Commission"). The Commission shall be payable by Company to Agent
          within sixty (60) days after the end of each calendar quarter for
          which hire is received and calculated pursuant to the Charter. Agent's
          commission in respect of any such Contract shall extend to any
          extensions of the Charter up to a maximum of eighteen (18) months
          beyond the initial term for a maximum total period of 36 months.
          Payment of commissions due Agent under this Agreement shall be made by
          Company in accordance with written instructions from Agent, but shall
          be subject to any applicable exchange control laws or regulations. In
          the event of a sale of the Vessel directly to the Company or an
          affiliate of the Company, Agent shall be entitled to a commission
          equal to .125% (1/8th of 1 percent) of the agreed sales price due and
          payable in cash upon closing of the sale.

     3.   NO AUTHORITY TO CONTRACT: Agent shall not have, nor shall it represent
          itself as having, any authority to make contracts or any other legal
          commitments in the name of or binding on Company or to pledge
          Company's credit or to extend in Company's name.

     4.   EXPENSES: Agent agrees to assume all expenses incurred and all
          disbursements by it as a sales agent of Company hereunder. Agent shall
          not incur any liability for such expenses and disbursements for the
          account of Company and shall indemnify Company in relation thereto.
          Notwithstanding the foregoing, Company shall reimburse Agent for all
          expenses incurred and all disbursements by it, which are incurred or
          disbursed with the prior written approval of Company.

     5.   COMPANY'S PROPERTY: Any property of Company received by Agent under
          this Agreement shall be held by it to the account of Company, and upon
          request from Company, such property shall be returned to Company in as
          good a condition as when received by Agent, ordinary wear and tear
          excepted. All records or papers of any kind relating to Company's
          business shall remain the property of Company and shall be returned by
          Agent to Company on demand.

     6.   TRADE SECRETS: Agent shall not acquire any rights to and goodwill,
          trademark, copyright, trade secret or other property of Company. If
          during the term of this Agreement any such rights should become vested
          in Agent by imposition of law or otherwise, Agent agrees it will, on
          Company's

                                     Page 1
<PAGE>

          request or on termination of this Agreement, assign any and all such
          rights to Company, together with any related good will. Nothing
          contained herein, however, shall require Agent to assign to Company
          any goodwill, trademark, copyright or other trade secret relating
          exclusively to equipment and services other than Company's or to
          Agent's business other than its business under this Agreement.

     7.   INDEMNIFICATION: Each party agrees to indemnify the other party, its
          agents, servants and employees against all claims, damages, losses and
          expenses, including reasonable attorneys' fees, arising out of
          performance of such party's work which is caused in whole or in part
          by such party's negligent act or omission or that of any person
          employed by such party for whose acts or omissions such party is
          liable.

     8.   REPRESENTATIONS BY AGENT:

          a.   Agent represents that it owns and will own any bank account into
               which it directs payments to be made by Company hereunder.

          b.   Agent agrees not to make any direct or indirect payments or
               provide any other benefits to directors, officer or employees of
               any Client of Company.

          c.   Agent agrees not to make any direct or indirect payments to any
               government officials or any direct or indirect payments that are
               illegal under any applicable law.

          d.   Agent agrees to conduct its activities in accordance with all
               applicable laws.

          e.   Agent agrees to keep all information furnished by Company
               confidential and not release same to any third party without the
               prior written consent of Company. The foregoing shall not apply
               to advertising materials and brochures unless Company so directs
               Agent in writing.

     9.   TERM: This Agreement shall be effective upon execution and shall
          continue in effect until the termination or cancellation of the
          Charter for any reason subject to extensions of the Charter described
          in paragraph 2 above. Upon such termination or cancellation of the
          Charter, the Commission shall be payable based on the Net Operating
          Margin under the Charter through the effective date of such
          termination or cancellation.

     10.  PROHIBITION OF ASSIGNMENT: This Agreement may not be assigned or
          otherwise transferred by either party without the prior written
          consent of the other party.

     11.  NOTICES: Any notices provided for under this Agreement shall be in
          writing and shall be delivered personally, by certified or registered
          mail, postage prepaid, to the address shown below or by facsimile
          (with verification of receipt). Notices given or served pursuant
          hereto shall be effective upon receipt by the party to be notified.

                           If to Agent:     Bassoe Offshore (USA), Inc.
                                            2000 West Loop South, Suite 2110
                                            Houston, TX 77027
                                            Facsimile No.: 713-850-9180

                           If to Company:   Chiles Offshore LLC
                                            11200 Richmond, Suite 490
                                            Houston, TX  77082-2618
                                            Facsimile No.:  713-339-3888

                                     Page 2
<PAGE>

          Either party may change its address for notices under this Agreement
          by notice to the other party as outlined above.

     12.  GOVERNING LAW: This Agreement and any disputes between the parties
          shall be construed under the laws of the State of Texas, without
          giving effect to any conflict of law rules or provisions.

     13.  FURTHER ASSURANCES: Each party shall execute such other deeds,
          assignments, endorsements and other instruments and evidences of
          transfer, give such further assurances and perform such acts which are
          or may become necessary or appropriate to effectuate and carry out the
          provisions of this Agreement.

IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and
year first above written.

BASSOE OFFSHORE (USA), INC.

"Agent"

By: /s/ Jonathan B. Fairbanks
    ------------------------------
Name:  Jonathan B. Fairbanks

Title: President

CHILES OFFSHORE LLC

"Company"

By: /s/ William E. Chiles
    ------------------------------

Name:  William E. Chiles

Title: President

                                     Page 3<PAGE>
                                                                   Exhibit 10.6
                              COMMISSION AGREEMENT

This Commission Agreement (this "Agreement") is entered into as of the 1st day
of April 2000 among Bassoe Offshore (USA), Inc. ("Bassoe"), SEACOR SMIT Inc.
("SEACOR", and together with Bassoe, the "Agents") and Chiles Offshore LLC
("Company").

WHEREAS, Company is negotiating to enter into various transactions for the
construction of a jackup mobile offshore drilling unit (the "Vessel") by Keppel
FELS Limited ("Builder") and one or more options to construct additional jackup
mobile offshore drilling units (the "Option Vessels") at Builder's Singapore
yard or the Brownsville, Texas yard of Builder's affiliate, Amfels, Inc.
(collectively, the "Transaction");

WHEREAS, Agents have provided and continue to provide various services and
assistance to Company in connection with the Transaction, and Company and Agents
desire to memorialize their agreement for payment of commissions to Agents for
such services, upon the terms contained herein.

NOW, THEREFORE, in consideration of the premises and the covenants contained
herein, and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged by the parties, Company and Agents agree as
follows:

     1.   COMMISSIONS. Agents shall provide such services as are reasonably
          requested by Company in connection with the negotiation and
          consummation of the Transaction regarding construction of the Vessel
          and any Option Vessels. In consideration for such services, Company
          shall pay Agents a commission equal to One Million Five Hundred
          Thousand Dollars ($1,500,000) (the "Base Commission") in connection
          with the Vessel, One Million Dollars ($1,000,000) of which shall be
          payable to SEACOR and Five Hundred Thousand Dollars ($500,000) of
          which shall be payable to Bassoe. The Base Commission shall be payable
          by Company to Agents within sixty (60) days after delivery of the
          Vessel to Company by Builder. On the first Option Vessel, Company
          shall pay Agents a commission equal to One Million Two Hundred and
          Fifty Thousand Dollars ($1,250,000) (the "First Option Commission") in
          connection with the First Option Vessel, One Million Dollars
          ($1,000,000) of which shall be payable to SEACOR and Two Hundred and
          Fifty Thousand Dollars ($250,000) of which shall be payable to Bassoe.
          The First Option Commission shall be payable by Company to Agents
          within sixty (60) days after delivery of the Vessel to Company by
          Builder. Commissions on the additional option units, if any, shall be
          agreed in writing between the parties on or before the execution of a
          construction contract for such Additional Option Vessel. Payment of
          commissions due Agents under this Agreement shall be made by Company
          in accordance with written instructions from Agents, but shall be
          subject to any applicable exchange control laws or regulations.

     2.   NO AUTHORITY TO CONTRACT. Agents shall not have, nor shall they
          represent themselves as having, any authority to make contracts or any
          other legal commitments in the name of or binding on Company or to
          pledge Company's credit or to extend credit in Company's name.

     3.   EXPENSES. Agents agree to assume all expenses incurred and all
          disbursements by them as agents of Company hereunder. Agents shall not
          incur any liability for such expenses and disbursements for the
          account of Company and shall indemnify Company in relation thereto.
          Notwithstanding the foregoing, Company shall reimburse Agents for all
          expenses incurred and all disbursements by them, which are incurred or
          disbursed with the prior written approval of Company.

<PAGE>

     4.   COMPANY'S PROPERTY. Any property of Company received by Agents under
          this Agreement shall be held by them for the account of Company, and
          upon request from Company, such property shall be returned to Company
          in as good a condition as when received by Agents, ordinary wear and
          tear excepted. All records or papers of any kind relating to Company's
          business shall remain the property of Company and shall be returned by
          Agents to Company on demand.

     5.   TRADE SECRETS. Agents shall not acquire any rights to and goodwill,
          trademark, copyright, trade secret or other property of Company. If
          during the term of this Agreement any such rights should become vested
          in Agents by imposition of law or otherwise, Agents agree they will,
          on Company's request or on termination of this Agreement, assign any
          and all such rights to Company, together with any related good will.
          Nothing contained herein, however, shall require Agents to assign to
          Company any goodwill, trademark, copyright or other trade secret
          relating exclusively to equipment and services other than Company's or
          to the business of either Agent other than their business under this
          Agreement.

     6.   INDEMNIFICATION. Each party agrees to indemnify each of the other
          parties and its agents, servants and employees against all claims,
          damages, losses and expenses, including reasonable attorneys' fees,
          arising out of performance of such party's work which is caused in
          whole or in part by such party's negligent act or omission or that of
          any person employed by such party for whose acts or omissions such
          party is liable.

     7.   REPRESENTATIONS BY AGENTS.

          a)   Each Agent represents that it owns and will own any bank account
               into which it directs payments to be made by Company hereunder.
          b)   Each Agent agrees not to make any direct or indirect payments or
               provide any other benefits to directors, officer or employees of
               any Client of Company.
          c)   Each Agent agrees not to make any direct or indirect payments to
               any government officials or any direct or indirect payments that
               are illegal under any applicable law.
          d)   Each Agent agrees to conduct its activities in accordance with
               all applicable laws.
          e)   Each agent agrees to keep all information furnished by Company
               confidential and not release same to any third party without the
               prior written consent of Company.

     8.   TERM. This Agreement shall be effective upon execution and shall
          continue in effect until the delivery of the Vessel and the Option
          Vessels, if any, and the expiration of any option periods under
          Company's agreement with the Builder.

     9.   PROHIBITION OF ASSIGNMENT. This Agreement may not be assigned or
          otherwise transferred by any party without the prior written consent
          of the other parties.

     10.  NOTICES. Any notices provided for under this Agreement shall be in
          writing and shall be delivered personally, by certified or registered
          mail, postage prepaid, to the address shown below or by facsimile
          (with verification of receipt). Notices given or served pursuant
          hereto shall be effective upon receipt by the party to be notified.

                  If to Bassoe:     Bassoe Offshore (USA), Inc.
                                    2000 West Loop South, Suite 2110
                                    Houston, TX  77027
                                    Facsimile No.: 713-850-9180

<PAGE>

                  If to SEACOR:     SEACOR SMIT Inc.
                                    1370 Avenue of the Americas, 25th Floor
                                    New York, New York 10019-4602
                                    Facsimile No.: (212) 582-8522

                  If to Company:    Chiles Offshore LLC

                                    I. 11200 Richmond, Suite 490
                                    II. Houston, TX 77082-2618
                                    Facsimile No.: 713-339-3888

         Either party may change its address for notices under this Agreement by
         notice to the other parties as outlined above.

1.       GOVERNING LAW. This Agreement and any disputes between the parties
         shall be construed under the laws of the State of Texas, without giving
         effect to any conflict of law rules or provisions.

2.       FURTHER ASSURANCES. Each party shall execute such other deeds,
         assignments, endorsements and other instruments and evidences of
         transfer, give such further assurances and perform such acts which are
         or may become necessary or appropriate to effectuate and carry out the
         provisions of this Agreement.

IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and
year first above written.

BASSOE OFFSHORE (USA), INC.

"Bassoe"

By: /s/ Jonathan B. Fairbanks
    -------------------------------------
Name:  Jonathan B. Fairbanks
    -------------------------------------
Title: President
    -------------------------------------

SEACOR SMIT Inc.

"SEACOR"

By: /s/ Randall Blank
    -------------------------------------
Name:  Randall Blank
    -------------------------------------
Title: Executive Vice President
    -------------------------------------

CHILES OFFSHORE LLC

"Company"

By: /s/ William E. Chiles
    -------------------------------------
Name:  William E. Chiles
    -------------------------------------
Title: President
    -------------------------------------

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00010-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00010-of-00352.parquet"}]]