Document:

<PAGE>

                                                                     EXHIBIT 4.7

C. E. UNTERBERG TOWBIN LETTERHEAD

                                                                   March 8, 2005

Mr. John Jacobson
President and Chief Executive Officer
Offshore Systems International Ltd.
#107 - 930 West 1st Street,
North Vancouver, BC
Canada V7P 3N4

Dear John:

This letter ("Letter Agreement") represents our understanding of the basis upon
which C.E. Unterberg, Towbin, LLC, a Delaware limited liability company ("CEUT")
is engaged to provide financial advisory and investment banking services to
Offshore Systems International Ltd. (the "Company"). This letter solely relates
to such financial advisory and investment banking services and not to any
potential investment in the Company by CEUT.

      1.    The Company hereby retains CEUT to act as its exclusive financial
            advisor with respect to a best efforts private placement transaction
            of up to US$16,000,000 of units (collectively the "Units")
            consisting of convertible preferred stock (the "Preferred Shares")
            and share purchase warrants ("Warrants"). The material terms and
            conditions of the proposed private placement are set out in the term
            sheet attached hereto as Schedule "A" and incorporated by reference
            (the "Term Sheet"). The Company will not offer any of the Units for
            sale to, or solicit any offers to buy from, any person or persons,
            whether directly or indirectly, otherwise than through CEUT, except
            for SDS Capital Group SPC, North Sound and their respective
            affiliates. The Company acknowledges that under no circumstances
            shall CEUT be liable for failure to obtain or produce the proposed
            financing.

      2.    As part of our engagement, CEUT will provide the Company with the
            following services:

            a.    Identify and contact potential investors;

            b.    As necessary, with management of the Company, meet with
                  potential investors approved by the Company and provide them
                  with such information furnished by the Company as may be
                  appropriate;

            c.    Assist the Company in negotiating with identified potential
                  investors; and

            d.    Assist the Company and the Company's legal counsel in
                  preparing documents related to the transaction and having such
                  documents executed in order to close the private placement
                  transaction and any other agreements as may be necessary.

<PAGE>

      3.    As compensation for the services rendered by CEUT hereunder, the
            Company agrees to pay CEUT for the sale of Units, a cash fee (the
            "Fee") equal to 7% of the proceeds raised from the sale of Units to
            investors (the "Purchasers") other than SDS Capital Group SPC, North
            Sound and their respective affiliates. In addition, the Company will
            issue to CEUT 3.5% of the common stock equivalents underlying the
            Preferred Shares issued in the form of common stock warrants (the "B
            Warrants") with an exercise price of CDN$0.85. Payment and issuance
            of the Fee and B Warrants set out herein is subject to acceptance by
            the TSX. The Company will use its reasonable commercial efforts to
            obtain such acceptance as part of its application for acceptance of
            the private placement. As noted in the Term Sheet, the fixing of the
            conversion price of the Preferred Shares to CDN$0.85, and the
            issuance of the Warrants to the Purchasers, are subject to approval
            of the Company's shareholders. All subscription agreements and
            subscription funds received by the Company prior to the shareholder
            vote will be held in escrow by a third party escrow agent. If
            shareholder approval is not obtained, the following provisions
            apply:

            (a)   The escrow agent will return all subscription funds to the
                  Purchasers, with interest at a rate of 12% per annum;

            (b)   CEUT will not be entitled to the Fee or any B Warrants.

      If shareholders approval is obtained, the Preferred Shares and Warrant
      will be issued to the Purchasers and CEUT will be paid the Fee and the B
      Warrants will be issued to CEUT.

      The Company also agrees to reimburse CEUT for its reasonable counsel and
      out-of-pocket expenses incurred in connection with the provision of its
      services hereunder, to a maximum of CDN$75,000.

      4.    CEUT acknowledges that the Company has no obligation or intention to
            file a registration statement in the United States to register the
            securities under the United States Securities Exchange Act of 1934
            (the "US Securities Act"), nor a prospectus in any province in
            Canada to qualify distribution of the Units or the underlying common
            shares. Accordingly, the Units will be issued subject to such hold
            periods and trading restrictions as may be imposed by applicable
            securities regulations and by the TSX in accordance with its
            policies. CEUT further agrees that:

            (a)   the Units will be offered and sold in the United States only
                  by CEUT who is duly registered as a broker-dealer pursuant to
                  Section 15(b) of the US Securities Act and under the
                  securities laws of each state in which such offers and sales
                  were made (unless exempted from the respective state's
                  broker-dealer registration requirements) and who is a member
                  in good standing with the National Association of Securities
                  Dealers, Inc.;

            (b)   all offers and sales of the Units in the United States or to
                  U.S. Persons will be made to "accredited investors" (as
                  defined below) (each, a "U.S. Placee");

            (c)   all offers and sales of the Units in the United States will be
                  effected in accordance with all applicable U.S. broker-dealer
                  requirements;

            (d)   immediately prior to delivering or transmitting a subscription
                  agreement to any U.S. Placee, CEUT will have reasonable
                  grounds to believe and will believe that such U.S. Placee is
                  an "accredited investor" as defined in Rule 501(a) under
                  Regulation D under the U.S. Securities Act ("Regulation D");

            (e)   no form of general solicitation or general advertising (as
                  those terms are used in Regulation D) will be used by CEUT, or
                  its affiliates or any person acting on its behalf,

                                       2
<PAGE>

                  including advertisements, articles, notices or other
                  communications published in any newspaper, magazine or similar
                  media or broadcast over radio or television, or any seminar or
                  meeting whose attendees had been invited by general
                  solicitation or general advertising, in connection with the
                  offer or sale of the Units to U.S. Placees;

            (f)   prior to any sale of Units to U.S. Placees, CEUT will cause
                  each U.S. Placee to complete and sign a subscription agreement
                  in the form or forms agreed to by the Company and CEUT;

            (g)   if any of the Units are sold in Canada through participating
                  selling agents, such Units will be sold only by registered
                  dealers in Canada and only to Purchasers who are "accredited
                  investors" as that term is defined in Multilateral Instrument
                  45-103 or, in the case of Purchasers who are Ontario
                  residents, "accredited investors" as that term is defined in
                  Ontario Securities Commission Rule 45-501; and

            (h)   The Company reserves the right to accept or reject
                  subscriptions from prospective Purchasers. CEUT will use its
                  reasonable commercial efforts to ensure that the no Purchaser,
                  or group of associated or affiliated Purchasers, will
                  subscribe for more that 4,000 Units.

      5.    CEUT and the Company have entered into a separate letter agreement,
            dated the date hereof, providing for the indemnification of CEUT by
            the Company in connection with CEUT's engagement hereunder, the
            terms of which are incorporated into this agreement in their
            entirety.

      6.    The Company recognizes and confirms that CEUT in acting pursuant to
            this engagement will be using publicly available information and
            information in reports and other materials provided by others,
            including, without limitation, information provided by or on behalf
            of the Company and that CEUT does not assume responsibility for and
            may rely, without independent verification, on the accuracy and
            completeness of any such information. The Company agrees to furnish
            or cause to be furnished to CEUT all necessary or appropriate
            information for use in its engagement and hereby warrants that any
            information relating to the Company that is furnished to CEUT by or
            on behalf of the Company, will be true and correct in all material
            respects and not misleading. CEUT agrees to receive and maintain
            such information in strict confidence (accept to the extent that it
            is a matter of public record or public knowledge) and to make such
            information available to its principals, employees, agents and
            advisors on a "need to know" basis in connection with its due
            diligence review of affairs of the Company. CEUT agrees to return
            all confidential information and documentation of the Company to it
            promptly at its request.

      7.    This engagement shall terminate upon the earlier of (i) closing of
            the private placement transaction and (ii) six (6) months from the
            date of this agreement. Any such termination shall not (except as
            provided herein) affect the compensation or indemnification
            provisions set forth herein, all of which shall remain in full force
            and effect. In addition, the Company shall be responsible for any
            fees as outlined above for any offering undertaken by the Company in
            lieu of the contemplated transaction described herein with any
            investors contacted by CEUT (other than SDS Capital Group SPC and
            North Sound) that is concluded within twelve (12) months of the date
            of termination of this agreement.

      8.    The Purchasers of the Units shall have a right of first offer for
            any equity, equity linked or debt financing proposed by the Company
            for a period of 24 months from the closing date, as set out in the
            Term Sheet. Such right of first offer shall be embodied in the
            formal subscription agreements between the Purchasers and the
            Company.

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<PAGE>

      9.    CEUT shall have the right of the first refusal during the term of
            this Agreement and for a period of twelve (12) months after the
            conclusion of the private placement transaction to act as the
            Company's lead manager and book runner or lead placement agent in
            connection with any Rule 144A offering, underwritten public
            offering, other underwritten financings or private placements
            ("Financings") that may be undertaken by the Company (except for any
            Financings that may be undertaken with SDS Capital Group SPC, North
            Sound and their respective affiliates) on like terms and conditions
            to this engagement.

      10.   Notwithstanding its engagement as placement agent hereunder, CEUT
            may not, without its prior written consent, (such consent not to be
            unreasonably withheld), be quoted or referred to in any document,
            release or communication prepared, issued or transmitted by the
            Company (including any entity controlled by, or under common control
            with, the Company and any director, officer, employee or agent
            thereof).

      11.   Following completion of this engagement, CEUT shall have the right
            to place advertisements in financial and other newspapers and
            journals at its own expense describing its services to the Company
            hereunder; subject to prior written approval of the Company, which
            will not be unreasonably withheld.

      12.   This Agreement is governed by the laws of the State of New York,
            without regard to such state's rules concerning conflicts of law,
            and will be binding upon and inure to the benefit of the Company and
            CEUT and their respective successors and assigns. The Company and
            CEUT agree to waive trial by jury in any action, proceeding or
            counterclaim brought by or on behalf of either party with respect to
            any matter whatsoever relating to or arising out of any actual or
            proposed transaction or the engagement of or performance by CEUT
            hereunder. The Company also hereby submits to the jurisdiction of
            the courts of the State of New York in any proceeding arising out of
            or relating to this Agreement, including federal district courts
            located in such state, agrees not to commence any suit, action or
            proceeding relating thereto except in such courts, and waives, to
            the fullest extent permitted by law, the right to move to dismiss or
            transfer any action brought in such court on the basis of any
            objection to personal jurisdiction, venue or inconvenient forum.
            This agreement may be executed in two or more counterparts, each of
            which shall be deemed to be an original, but all of which shall
            constitute one and the same agreement.

CEUT will act under this Agreement as an independent contractor with duties
solely to the Company.

The Company acknowledges that CEUT and its affiliates may have and may in the
future have investment banking and other relationships with parties other than
the Company, which parties may have interests with respect to this placement.
Although CEUT in the course of such other relationships may acquire information
about the placement, potential purchasers of the Securities or such other
parties, CEUT shall have no obligation to disclose such information to the
Company or to use such information on behalf of the Company. Furthermore, the
Company acknowledges that CEUT may have fiduciary or other relationships whereby
CEUT may exercise voting power over securities of various persons, which
securities may from time to time include securities of the Company or of
potential purchasers of the Securities or others with interests in respect of
the placement. The Company acknowledges that CEUT may exercise such powers and
otherwise perform its functions in connection with such fiduciary or other
relationships without regard to its relationship to the Company hereunder.

Please note that CEUT is a full service securities firm engaged in securities
trading and brokerage activities, as well as providing investment banking,
financing and financial advisory services. In the ordinary course of our
trading, brokerage and financing activities, CEUT or its affiliates may at any
time

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<PAGE>

hold long or short positions, and may trade or otherwise effect transactions,
for our own account or the accounts of customers, in debt or equity securities
or senior loans of the Company.

If the foregoing correctly sets forth the understanding and agreement between
CEUT and the Company, please so indicate in the space provided for that purpose
below, together with the enclosed duplicate original, and return one (1) of
these originals to us, whereupon this letter shall constitute a binding
agreement as of the date hereof.

                                                Sincerely,

                                                C.E. Unterberg, Towbin, LLC

                                                By: /s/ "Mark J. Hughes"
                                                    --------------------
                                                    Mark J. Hughes
                                                    Managing Director

Approved and agreed to as of March 8, 2005:

Offshore Systems International Ltd.

By: "/s/ John Jacobson"
    -------------------
     John Jacobson
     President and Chief Executive Officer

                                       5
<PAGE>

                                                                   March 8, 2005

C.E. Unterberg, Towbin, LLC
350 Madison Avenue
New York, NY 10017

Ladies and Gentlemen:

In connection with the engagement of C.E. Unterberg, Towbin, LLC, a Delaware
limited liability company ("CEUT") to advise and assist Offshore Systems
International Ltd. (the "Company") with the subject matter in the letter
agreement dated the date hereof between CEUT and the Company, the Company agrees
that it will indemnify and hold harmless CEUT and its affiliates and their
respective directors, officers, agents and employees and each other person
controlling CEUT or any of CEUT's affiliates (collectively, the "Indemnified
Parties"), to the full extent lawful, from and against any losses, expenses,
claims or proceedings (collectively, "losses") (i) related to or arising out of
(A) oral or written information provided by the Company, its employees or other
agents, which information either the Company or CEUT provide to any actual or
potential buyers, sellers, investors or offerees, or (B) any other action or
failure to act by the Company, its directors, officers, agents or employees or
by CEUT or any Indemnified Party at the Company's request or with the Company's
consent, or (ii) otherwise related to or arising out of the engagement or any
transaction or conduct in connection therewith and resulting primarily from the
Company's negligence, bad faith or willful misconduct, except that these clauses
(i) and (ii) shall not apply with respect to (x) any losses that are finally
judicially determined to have resulted primarily from the gross negligence or
willful misconduct of such Indemnified Party, or (y) any amount paid in
settlement of claims without the Company's consent, which consent will not be
unreasonably withheld.

In the event that the foregoing indemnity is unavailable to any Indemnified
Party for any reason (other than as a consequence of a final judicial
determination of willful misconduct, bad faith or gross negligence of such
Indemnified Party), then the Company agrees to contribute to any losses related
to or arising out of the engagement or any transaction or conduct in connection
therewith as follows. With respect to such losses referred to in clause (i) of
the preceding paragraph, each of the Company and CEUT shall contribute in such
proportion as is appropriate to reflect the relative benefits received (or
anticipated to be received) by CEUT, on the one hand, and by the Company and its
security holders, on the other hand, from the actual or proposed transaction
arising in connection with the engagement. With respect to any other losses, and
for losses referred to in clause (i) of the preceding paragraph if the
allocation provided by the immediately preceding sentence is unavailable for any
reason, each of the Company and CEUT shall contribute in such proportion as is
appropriate to reflect not only the relative benefits as set forth above, but
also the relative fault of each of the Company and CEUT in connection with the
statements, omissions or other relevant equitable considerations. Benefits
received (or anticipated to be received) by the Company and its security holders
shall be deemed to be equal to the aggregate cash consideration and value of
securities or any other property payable, issuable, exchangeable or transferable
in such transaction or proposed transaction, and benefits received by CEUT shall
be deemed to be equal to the compensation paid by the Company to CEUT (whether
in cash or otherwise) in connection with the engagement (exclusive of amounts
paid for reimbursement of expenses or paid under this agreement). Relative fault
shall be determined by reference to, among other things, whether any alleged
untrue statement or omission or any other alleged conduct relates to information
provided by the Company or other conduct by the Company (or its employees or
other agents), on the one hand, or by CEUT, on the other hand. CEUT and the
Company agree that it would not be just and equitable if contribution were
determined by pro rata allocation or by any other method of allocation that does
not take account of the equitable considerations referred to above.
Notwithstanding anything to the contrary above, in no event shall CEUT be
responsible for any amounts in excess of the amount of the compensation actually
paid by

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<PAGE>

the Company to CEUT (in cash or otherwise) in connection with the engagement
(exclusive of amounts paid for reimbursement of expenses or paid under this
agreement).

Promptly after CEUT receives notice of the commencement of any action or other
proceeding in respect of which indemnification or reimbursement may be sought
hereunder, CEUT will notify the Company thereof; but the omission so to notify
the Company shall not relieve the Company from any obligation hereunder unless,
and only to the extent that, such omission results in its forfeiture of
substantive rights or defenses. If any such action or other proceeding shall be
brought against any Indemnified Party, the Company shall, upon written notice
given reasonably promptly following CEUT's notice to the Company of such action
or proceeding, be entitled to assume the defense thereof at its expense with
counsel chosen by the Company and reasonably satisfactory to the Indemnified
Parties; provided, however, that any Indemnified Party may at its own expense
retain separate counsel to participate in such defense. Notwithstanding the
foregoing, such Indemnified Party shall have the right to employ separate
counsel at the Company's expense and to control its own defense of such action
or proceeding if, in the reasonable opinion of counsel to such Indemnified
Party, (i) there are legal defenses available to such Indemnified Party or to
other indemnified parties that are different from or additional to those
available to the Company, or (ii) a conflict or likely conflict exists between
the Company and such Indemnified Party that would make such separate
representation advisable; provided, however, that in no event shall the Company
be required to pay fees and expenses under this indemnity for more than one
counsel in any one legal action or group of related legal actions. The Company
agrees that it will not, without the prior written consent of CEUT, which
consent shall not be unreasonably withheld or delayed, settle or compromise or
consent to the entry of any judgment in any pending or threatened claim, action
or proceeding relating to the matters that are the subject of CEUT's engagement
(whether or not any Indemnified Party is a party thereto) unless such
settlement, compromise or consent includes an unconditional release of CEUT and
each other Indemnified Party from all liability arising or that may arise out of
such claim, action or proceeding.

The Company further agrees that no Indemnified Party shall have any liability
(whether direct or indirect, in contract or tort or otherwise) to the Company or
any of its affiliates, creditors or security holders for or in connection with
the engagement or any actual or proposed transactions or other conduct in
connection therewith except for losses incurred by the Company that are finally
judicially determined to have resulted primarily from the gross negligence or
willful misconduct of such Indemnified Party or have resulted from a breach of
the engagement between the Company and CEUT.

The foregoing agreement is in addition to any rights CEUT may have at common law
or otherwise and shall be binding on and inure to the benefit of any successors,
assigns, and personal representatives of the Company and each Indemnified Party.
This agreement is governed by the laws of the State of New York, without regard
to such state's rules concerning conflicts of laws. Each of the parties hereto
also hereby submits to the jurisdiction of the courts of the State of New York
in any proceeding arising out of or relating to this agreement, including
federal district courts located in such state, agrees not to commence any suit,
action or proceeding relating hereto except in such courts, and waives, to the
fullest extent permitted by law, the right to move to dismiss or transfer any
action brought in such court on the basis of any objection to personal
jurisdiction, venue or inconvenient forum. Solely for purposes of enforcing this
agreement, each party hereby consents to personal jurisdiction, service of
process and venue in any court in which any claim or proceeding that is subject
to this agreement is brought against the other party. Any right to trial by jury
with respect to any claim or proceeding related to or arising out of the
engagement, or any transaction or conduct in connection therewith or this
agreement is waived.

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<PAGE>

This agreement shall remain in full force and effect notwithstanding the
completion or termination of the engagement.

                                   Very truly yours,

                                   Offshore Systems International Ltd.

                                   By: ________________________
                                       John Jacobson
                                       President and Chief Executive Officer

Agreed:

C.E. Unterberg, Towbin, LLC

By: ____________________
    Mark J. Hughes
    Managing Director

                                       8
<PAGE>

                                  SCHEDULE "A"

PREFERRED STOCK
Summary of Terms of Proposed Private Placement

<TABLE>
<S>                      <C>
COMPANY:                 Offshore Systems International Ltd. (the "Company").

PURCHASERS:              SDS Capital Group SPC, Ltd and other institutional investors (collectively, the "Purchasers").

ISSUE:                   CDN$17 - $19.5 million (the "Issue Amount")consisting of 17,000 to 19,500 Units. Each Unit will consist of
                         20 preferred shares (the "Preferred Shares") convertible into common shares of the Company and 588 share
                         (the "Warrants"); provided that the issuance of the purchase warrants Units is conditional upon the
                         Company obtaining TSX and shareholder approval.

PRICE PER UNIT:          CDN$1,000.00 per Unit.

OPTIONAL CONVERSION:     Each Preferred Share will be convertible at the option of the holder into the number of Common Shares of
                         Company that is determined by dividing the issue price of CDN$50 per Preferred Share by CDN $0.85 (with
                         each Preferred Share being convertible into 58.82 common shares).

MANDATORY CONVERSION:    The Company may require the Purchasers to convert the Preferred Shares to Common Shares if (i) at any time
                         after twelve (12) months following the closing date, the closing price of the Common Shares has been
                         greater than 250% of the fixed Conversion Price of CDN $0.85 for at least twenty (20) consecutive trading
                         days, or (ii) at any time upon the Company's sale of its Common Shares in a firm commitment public
                         underwritten offering in which (a) the offering price of the Common Shares is greater than 200% of the
                         fixed Conversion Price of CDN $0.85, (b) the aggregate gross proceeds exceed CDN$40 million, and (c) the
                         underlying Common Shares are  freely tradable.

CONVERSION DATE:         The date on which a Purchaser delivers to the Company a notice of conversion together with the certificates
                         representing the Preferred Shares being converted duly endorsed for transfer.

DIVIDENDS:               Fixed cumulative dividends at the rate of 7% per annum, payable semi-annually or upon conversion or
                         redemption.

WARRANTS:                The number of whole Warrants issued for each Unit subscribed for will be 588. Each whole Warrant will
                         entitle the holder to purchase one Common Share of the Company at the exercise price of CDN $0.85. The
                         Warrants shall be exercisable for a period of five years from the date of issuance at any time at the
                         election of the holders. During the first twelve months following closing, the Warrants will be exercisable
                         for cash. Thereafter until expiration, the Warrants will be exercisable for cash or by cashless exercise
                         (reducing the number of shares to be issued by the Company). The Company may redeem  the Warrants for $0.10
                         per Warrant upon twenty days notice, provided that (i) the Common Shares closes above 300% of the exercise
                         price for a period of twenty consecutive trading days, and (ii) the Common Shares underlying the Warrants
                         are freely tradable.  Any Warrants which are the subject of a redemption notice may be exercised within the
                         20 day notice period.
</TABLE>

                            9
<PAGE>

<TABLE>
<S>                      <C>
COMPANY'S RIGHT OF       The Company will also have the right, but not the obligation, to redeem the  Preferred Shares at any time
REDEMPTION:              after 3 years following the closing date at the original issue price plus a premium of 20% of the original
                         issue price. A holder will have 20 days after receipt of notice of redemption within which to convert the
                         Preferred Shares to Common Shares.

LIQUIDATION PREFERENCE:  The liquidation preference per share shall equal the purchase price per Preferred Share plus any accrued
                         but unpaid dividends thereon at the time of liquidation.

VOTING:                  Each Preferred Share will entitle the holder to one vote on all matters brought before the holders of the
                         common shares.

RIGHT OF FIRST OFFER:    For any equity, equity linked, or debt financing within twenty-four (24) months from the closing date, the
                         Purchasers shall have a right of first offer to purchase all or part of the private placement. The
                         Purchasers will have ten (10) trading days to respond. A carve-out of this provision will be granted to the
                         Company for the issuance of stock or debt financing for situations involving strategic partnerships,
                         acquisition candidates and public under written offerings.

OTHER RIGHTS:            Subject to securities laws and the policies of the TSX, the Purchasers shall be entitled to assign and
                         transfer, without any other person's or the Company's consent and without restriction, all or any portion
                         of the Preferred Shares or Warrants and the rights thereto. All per share amounts set forth herein are
                         subject to equitable adjustment for stock splits, dividends, combinations, reorganizations and the like.
                         The Company will not issue any securities or unsecured debt obligations senior to the Preferred Shares
                         without the prior written approval of the holders of a majority of the Preferred Shares, such approval not
                         to be unreasonably withheld.

                         The Company will have the right to make any withholding or deduction in connection with the Preferred
                         Shares, Warrants, or the conversion or exercise thereof, in respect of any present or future tax, levy,
                         duty, impost, assessment or other governmental charge as required by law.

ESCROW AND SHAREHOLDER   All subscription agreements and subscription funds will be held in  escrow by a third party escrow agent
APPROVAL:                mutually acceptable to the parties (the "Escrow Agent"). The Company agrees to seek shareholder approval
                         of certain of the terms of the private placement as soon as reasonably practicable, having regard to the
                         regulatory requirements for the calling of shareholders' meetings. The Company's management will recommend
                         that the shareholders approve the private placement as proposed herein and will solicit proxies to vote in
                         favour of approval. For greater certainty, the parties intend that upon receipt of shareholder approval,
                         the following shall promptly occur without further agreement of the parties:

                         (a)     the Preferred Shares will be issued to the Purchasers;

                         (b)     the Warrants will be issued to the Purchasers;

                         (c)     the Escrow Agent will release the subscription funds to the Company; and

                         (d)     the Purchasers will receive interest on the subscription funds at a rate of 12% per annum, less
                                 applicable withholding tax.
</TABLE>

                            10
<PAGE>

<TABLE>
<S>                      <C>
                         If the shareholder approval is not obtained, the Escrow Agent will immediately return the subscription
                         funds to the Purchasers, with interest on such funds at a rate of 12% per annum less applicable withholding
                         tax.

CONDITIONS PRECEDENT TO  Completion of legal documentation and due diligence satisfactory to the Company and Purchasers, and
CLOSING:                 receipt of regulatory approval(including TSX acceptance).

EXPENSES:                At Closing, the Company will pay all reasonable expenses incurred by the Purchasers in connection with
                         the negotiation, preparation and execution of the definitive documents, including attorneys' fees and
                         expenses, to a total maximum of CDN$75,000.

CONFIDENTIALITY:         All parties agree to keep this private placement proposal and all conversations and exchanged information
                         strictly confidential except to the extent that the Company is required by applicable securities laws and
                         regulations to disclose the proposed private placement contemplated by this term sheet.

ACCEPTANCE OF            The Company reserves the right to accept or reject subscriptions from prospective Purchasers. SDS and
SUBSCRIPTIONS:           parties who are engaged to assist the Company in placing the private placement will use their reasonable
                         commercial efforts to ensure that the subscriptions solicited from prospective Purchasers will not, if
                         accepted by the Company: (a) upon conversion, result in the acquisition by any Purchaser, or group of
                         Purchasers acting in concert, of a control position in the Company; or (b) in the case of subscriptions
                         received from "related parties" of the Company, require the Company to obtain a formal valuation or
                         shareholder approval with respect to the private placement under applicable securities regulations and TSX
                         policies (it being acknowledged that the Company will require shareholder approval to fix the conversion
                         price and issue the warrants as outlined above).
</TABLE>

                                       11<PAGE>

                                                                     EXHIBIT 4.8

                       OFFSHORE SYSTEMS INTERNATIONAL LTD.

March 8, 2005

VIA EMAIL

MR. BRINT COXE
59 Zaccheus Meade Lane
Greenwich, CT
06831-3716

Dear Sir:

RE: PROPOSED PRIVATE PLACEMENT OF CONVERTIBLE PREFERRED SHARES AND SHARE
    PURCHASE WARRANTS
    - ADVISORY SERVICES AGREEMENT

This letter sets out our agreement respecting your provision of advisory
services to Offshore Systems International Ltd. ("Offshore") in connection with
the above-mentioned private placement. The material terms and conditions of the
private placement are set out in the Term Sheet attached hereto as Schedule "A".
We agree as follows:

SERVICES

1.    You have been providing, and will continue to provide, advisory services
      to Offshore in connection with the private placement, including the
      following:

      (a)   assisting in structuring the proposed private placement;

      (b)   identifying and contacting potential institutional investors as well
            as institutions which may be prepared to assist in placing the
            financing with their clients;

      (c)   assisting in negotiations with the holders of the outstanding Class
            B Series 1 Preference shares, having regard to their priority
            position with respect to the issuance of securities by Offshore; and

      (d)   all other services which are ancillary to the foregoing.

COMPENSATION

2.    Subject to section 3, In consideration of the provision of your advisory
      services to Offshore, Offshore agrees to:

      (a)   pay to you a fee (the "Fee") of CDN$800,000; and

<PAGE>

      (b)   issue to you 350,000 share purchase warrants ("B Warrants") which
            will have the same terms and conditions as the share purchase
            warrants ("Warrants") issued to the investors pursuant to the
            private placement.

PROVISIONS RESPECTING PAYMENTS

3.    You acknowledge and agree that payment of the Fee and issuance of the B
      Warrants to you pursuant to section 2 is subject to acceptance by the TSX
      and the private placement being fully subscribed for. Offshore will use
      its reasonable commercial efforts to obtain such acceptance as part of its
      application for acceptance of the private placement. In the event the Fee
      becomes payable, but the offering has not been fully subscribed for, the
      Fee will be reduced by an amount equal to the percentage that the private
      placement is under-subscribed. As noted in the Term Sheet, the fixing of
      the conversion price of the Preferred Shares to CDN$0.85, and the issuance
      of the Warrants to the Purchasers, are subject to approval of Offshore's
      shareholders. All subscription agreements and subscription funds received
      by the Company prior to the Shareholder vote will be held in escrow by a
      third party escrow agent. If shareholder approval is not obtained, the
      following provisions apply:

      (a)   The escrow agent will return all subscription funds to the
            Purchasers, with interest at a rate of 12% per annum.

      (b)   You will not be entitled to the Fee or any B Warrants.

      If shareholder approval is obtained, the Preferred Shares and Warrants
      will be issued to the Purchasers and you will be paid the Fee (subject
      only to pro-rationing in the event the offering is not fully subscribed)
      and the B Warrants will be issued to you.

RIGHT OF FIRST REFUSAL

4.    You shall have the right of the first refusal during the term of this
      Agreement and for a period of twenty-four (24) months after the conclusion
      of the private placement transaction to act as the Company's financial
      advisor in connection with any Rule 144A offering, underwritten public
      offering, other underwritten financings or private placements that may be
      undertaken by the Company, and any extraordinary corporate transaction for
      which the Company will retain a financial advisor, on such terms and
      conditions as are to be negotiated between you and the Company. You and
      the Company agree to conclude the negotiation of a definitive financial
      advisory agreement within one (1) month of this Agreement.

                                       2
<PAGE>

We trust that this accurately sets out our understanding. Please confirm your
agreement to the foregoing by executing this letter in the space provided below
and returning one copy to us.

Yours truly,

OFFSHORE SYSTEMS INTERNATIONAL LTD.

Per:

      /s/ "John A. Jacobson"
      ---------------------
      Authorized Signature

Acknowledged and agreed to this 8th day of _____ March_____, 2005.

/s/ "Brint Coxe"
----------------
BRINT COXE

                                       3
<PAGE>

                                  SCHEDULE "A"

PREFERRED STOCK
Summary of Terms of Proposed Private Placement

<TABLE>
<S>                       <C>
COMPANY:                  Offshore Systems International Ltd. (the "Company").

PURCHASERS:               SDS Capital Group SPC, Ltd and other institutional investors (collectively, the "Purchasers").

ISSUE:                    CDN$17 - $19.5 million (the "Issue Amount")consisting of 17,000 to 19,500 Units. Each Unit will consist of
                          20 preferred shares (the "Preferred Shares") convertible into common shares of the Company and 588 share
                          purchase warrants (the "Warrants"); provided that the issuance of the Units is conditional upon the
                          Company obtaining TSX and shareholder approval.

PRICE PER UNIT:           CDN$1,000.00 per Unit.

OPTIONAL                  CONVERSION: Each Preferred Share will be convertible at the option of the holder into the number of Common
                          Shares of the Company that is determined by dividing the issue price of CDN$50 per Preferred Share by CDN
                          $0.85 (with each Preferred Share being convertible into 58.82 common shares).

MANDATORY CONVERSION:     The Company may require the Purchasers to convert the Preferred Shares to Common Shares if (i) at any time
                          after twelve (12) months following the closing date, the closing price of the Common Shares has been
                          greater than 250% of the fixed Conversion Price of CDN $0.85 for at least twenty (20)
                          consecutive trading days, or (ii) at any time upon the Company's sale of its Common Shares  in a firm
                          commitment public underwritten offering in which (a) the offering price of the Common Shares is greater
                          than 200% of the fixed Conversion Price of CDN $0.85, (b) the aggregate gross proceeds exceed CDN$40
                          million, and (c) the underlying Common Shares are  freely tradable.

CONVERSION DATE:          The date on which a Purchaser delivers to the Company a notice of conversion together with the
                          certificates representing the Preferred Shares being converted duly endorsed for transfer.

DIVIDENDS:                Fixed cumulative dividends at the rate of 7% per annum, payable semi-annually or upon conversion or
                          redemption.
</TABLE>

                                       4
<PAGE>

<TABLE>

<S>                       <C>
WARRANTS:                 The number of whole Warrants issued for each Unit subscribed for will be 588. Each whole Warrant will
                          entitle the holder to purchase one Common Share of the Company at the exercise price of CDN $0.85. The
                          Warrants shall be exercisable for a period of five years from the date of issuance at any time at the
                          election of the holders. During the first twelve months following closing, the Warrants will be
                          exercisable for cash. Thereafter until expiration, the Warrants will be exercisable for cash or by
                          cashless exercise (reducing the number of shares to be issued by the Company). The Company may redeem the
                          Warrants for $0.10 per Warrant upon twenty days notice, provided that (i) the Common Shares closes above
                          300% of the exercise price for a period of twenty consecutive trading days, and (ii) the Common Shares
                          underlying the Warrants are freely tradable.  Any Warrants which are the subject of a redemption notice
                          may be exercised within the 20 day notice period.

COMPANY'S RIGHT OF        The Company will also have the right, but not the obligation,  to redeem the Preferred Shares at any time
REDEMPTION:               after 3 years following the closing date at the original issue price plus a premium of 20% of the original
                          issue price. A holder will have 20 days after receipt of notice of redemption within which to convert
                          the Preferred Shares to Common Shares.

LIQUIDATION PREFERENCE:   The liquidation preference per share shall equal the purchase price per Preferred Share plus any accrued
                          but unpaid dividends thereon at the time of liquidation.

VOTING:                   Each Preferred Share will entitle the holder to one vote on all matters brought before the holders of the
                          common shares.

RIGHT OF FIRST OFFER:     For any equity, equity linked, or debt financing within twenty-four (24) months from the closing date, the
                          Purchasers shall have a right of first offer to purchase all or part of the private placement. The
                          Purchasers will have ten (10) trading days to respond. A carve-out of this provision will be granted to
                          the Company for the issuance of stock or debt financing for situations involving strategic partnerships,
                          acquisition candidates and public underwritten offerings.

OTHER RIGHTS:             Subject to securities laws and the policies of the TSX, the Purchasers shall be entitled to assign and
                          transfer, without any other person's or the Company's consent and without restriction, all or any portion
                          of the Preferred Shares or Warrants and the rights thereto. All per share amounts set
</TABLE>

                                       5
<PAGE>

<TABLE>
<S>                       <C>
                          forth herein are subject to equitable adjustment for stock splits, dividends, combinations,
                          reorganizations and the like. The Company will not issue any securities or unsecured debt obligations
                          senior to the Preferred Shares without the prior written approval of the holders of a majority of the
                          Preferred Shares, such approval not to be unreasonably withheld.

                          The Company will have the right to make any withholding or deduction in connection with the Preferred
                          Shares, Warrants, or the conversion or exercise thereof, in respect of any present or future tax, levy,
                          duty, impost, assessment or other governmental charge as required by law.

ESCROW AND SHAREHOLDER    All subscription agreements and subscription funds will be held in escrow by a third party escrow
APPROVAL:                 agent mutually acceptable to the parties (the "Escrow Agent"). The Company agrees to seek shareholder
                          approval of certain of the terms of the private placement as soon as reasonably practicable, having regard
                          to the regulatory requirements for the calling of shareholders' meetings. The Company's management will
                          recommend that the shareholders approve the private placement as proposed herein and will solicit proxies
                          to vote in favour of approval. For greater certainty, the parties intend that upon receipt of shareholder
                          approval, the following shall promptly occur without further agreement of the parties:

                          (a)     the Preferred Shares will be issued to the Purchasers;

                          (b)     the Warrants will be issued to the Purchasers;

                          (c)     the Escrow Agent will release the subscription funds to the Company; and

                          (d)     the Purchasers will receive interest on the subscription funds at a rate of 12% per annum, less
                                  applicable withholding tax.

                          If the shareholder approval is not obtained, the Escrow Agent will immediately return the subscription
                          funds to the Purchasers, with interest on such funds at a rate of 12% per annum less applicable
                          withholding tax.

CONDITIONS PRECEDENT TO   Completion of legal documentation and due diligence  satisfactory to the Company and Purchasers, and
CLOSING:                  receipt of regulatory approval (including TSX acceptance).
</TABLE>

                                       6
<PAGE>

<TABLE>
<S>                       <C>
EXPENSES:                 At Closing, the Company will pay all reasonable expenses incurred by the Purchasers in connection with the
                          negotiation, preparation and execution of the definitive documents, including attorneys' fees and
                          expenses, to a total maximum of CDN$75,000.

CONFIDENTIALITY:          All parties agree to keep this private placement proposal and all conversations and exchanged information
                          strictly confidential except to the extent that the Company is required by applicable securities laws and
                          regulations to disclose the proposed private placement contemplated by this term sheet.

ACCEPTANCE OF             The Company reserves the right to accept or reject subscriptions from prospective Purchasers. SDS and
SUBSCRIPTIONS:            parties who are engaged to assist the Company in placing the private placement will use their reasonable
                          commercial efforts to ensure that  the subscriptions solicited from prospective Purchasers will not, if
                          accepted by the Company: (a) upon conversion, result in the acquisition by any Purchaser, or group of
                          Purchasers acting in concert, of a control position in the Company; or (b) in the case of subscriptions
                          received from "related parties" of the Company, require the Company to obtain a formal valuation or
                          shareholder approval with respect to the private placement  under applicable securities regulations and
                          TSX policies (it being acknowledged that the Company will require shareholder approval to fix the
                          conversion price and issue the warrants as outlined above).
</TABLE>

                                       7

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