Exhibit 5.3

Linklaters LLP

World Trade Centre Amsterdam

Zuidplein 180

1077 XV Amsterdam

Telephone (31 20) 799 6200

Facsimile (31 20) 799 6300

CGGVeritas Services Holding B.V.

Schiphol Boulevard 299

1118 BH Amsterdam

The Netherlands

CGGVeritas Services (UK) Holding B.V.

Schiphol Boulevard 299

1118 BH Amsterdam

The Netherlands

27 September 2011

Dear Sirs,

CGGVeritas Services Holding B.V. (“Holding”) and CGGVeritas Services (UK) Holding B.V. (“UK” and together with Holding, the “Companies”) – Registration under the United States Securities Act of 1933, as amended, (the “Act”) of U.S.$650,000,000 6 ¹/2% Senior Notes due 2021

1 Introduction

We have acted as Dutch legal advisers to the Companies in connection with the registration under the Act by Compagnie Générale de Geophysique—Veritas (the “Issuer”) of the proposed offer (the “Offer”) to exchange the Issuer’s U.S.$650,000,000 6 ¹/2% Senior Notes due 2021 (the “Exchange Notes”) for a like principal amount of the Issuer’s 6 ¹/2% Senior Notes due 2021 (the “Original Notes” and together with the Exchange Notes, the “Notes”). The Original Notes are, and the Exchange Notes will be, issued pursuant to an indenture dated as of 31 May 2011 between the Issuer, the Companies, certain subsidiaries of the Issuer (such subsidiaries other than the Companies, the “Guarantors”) and The Bank of New York Mellon (the “Indenture”). The Notes are stated to be unconditionally and irrevocably guaranteed by the Companies and the Guarantors.

2 Dutch Law

This opinion is limited to Dutch law as applied by the Dutch courts and published in print and in effect on the date of this opinion, excluding tax law, the laws of the European Union (insofar as not implemented or incorporated in Dutch law) and market abuse, competition and procurement laws. This opinion is given on the basis that we undertake no responsibility to notify any addressee of this opinion of any change in Dutch law after the date of this opinion. It is given on the basis that it and all matters relating to it will be governed by and construed in accordance with Dutch law and that any action relating to it can only be brought before a Dutch court. In this opinion, Dutch legal concepts are expressed in English terms and not in their original Dutch terms. The Dutch concepts concerned may not be identical to the concepts described by the English terms as they may exist or be interpreted under the laws of jurisdictions other than the Netherlands.

This communication is confidential and may be privileged or otherwise protected by work product immunity.

Linklaters LLP is a limited liability partnership registered in England and Wales with registered number OC326345. It is a law firm regulated by the Solicitors Regulation Authority. The term partner in relation to Linklaters LLP is used to refer to a member of Linklaters LLP or an employee or consultant of Linklaters LLP or any of its affiliated firms or entities with equivalent standing and qualifications. A list of the names of the members of Linklaters LLP together with a list of those non-members who are designated as partners and their professional qualifications is open to inspection at its registered office, One Silk Street, London EC2Y 8HQ, England or on www.linklaters.com and such persons are either solicitors, registered foreign lawyers or European lawyers.

Please refer to www.linklaters.com/regulation for important information on our regulatory position.

3 Scope of Inquiry

For the purpose of this opinion we have examined the following documents:

3.1 Faxed copies of extracts from the trade register obtained from the chamber of commerce for Amsterdam (the “Chamber of Commerce”) regarding the Companies dated 23 September 2011.

3.2 A faxed copy of a notarial deed of incorporation of Holding dated 20 October 2008 and of its articles of association as most recently amended on 21 September 2010, both as obtained from and according to the Chamber of Commerce.

3.3 A faxed copy of a notarial deed of incorporation of UK dated 10 July 2009 and of its articles of association as most recently amended on 30 October 2009, both as obtained from and according to the Chamber of Commerce.

3.4 A print-out of an electronic copy of a written resolution of the management board of Holding including a power of attorney granted by Holding to each of its managing directors, Stephane-Paul Frydman and Yves Goulard (the “Holding Power of Attorney”) and of a written resolution of the management board of UK, both dated 20 May 2011 including a power of attorney granted by UK to each of its managing directors, Stephane-Paul Frydman and Yves Goulard (together with the Holding Power of Attorney, the “Powers of Attorney”).

3.5 A print-out of an electronic copy of a written resolution of the general meeting of shareholders of Holding and of a written resolution of the general meeting of shareholders of UK, both dated 20 May 2011.

3.6 A print-out of an electronic copy of an executed copy of the Indenture.

3.7 A print-out of an electronic copy of a registration statement on Form F-4 and Form S-4 as filed with the Securities and Exchange Commission on 27 September 2011 (the “Registration Statement”), including a prospectus, (the “Prospectus”) relating to the Exchange Notes.

References to “documents” are to the Notes and any and all documents mentioned in this paragraph 3, unless the context requires otherwise. Our examination has been limited to the text of the documents. In addition we have obtained the following confirmations given by telephone or otherwise on the date of this opinion:

3.8 Confirmation from the Chamber of Commerce that the trade register extracts referred to in paragraph 3.1 are up to date in all respects material for this opinion.

3.9 Confirmation from the insolvency office (afdeling insolventie) of the competent court in Amsterdam and the central insolvency register (centraal insolventieregister) that the Companies are not registered as having been declared bankrupt (failliet verklaard) or granted suspension of payments (surseance verleend).

4 Assumptions

For the purpose of this opinion, we have made the following assumptions:

4.1 All copy documents conform to the originals and all originals are genuine and complete.

4.2 Each signature is the genuine signature of the individual concerned.

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4.3 The documents were at their date, and have to the date of this opinion remained, accurate, complete and in full force and effect without modification and have not been revoked or declared null and void, and have been, or will have been, executed in the same form as examined by us for the purposes of this opinion, the Original Notes have been validly issued, offered, authenticated and fully paid up and the Exchange Notes will have been authenticated, issued, offered and exchanged for the Original Notes as contemplated by, and in accordance with, the Indenture, the Registration Statement and the Prospectus. All confirmations referred to in paragraph 3.8 and 3.9 are true.

4.4 The deeds of incorporation are valid notarial deeds (notariële akte) and there were no defects in the incorporation of the Companies not appearing on the face of the deeds of incorporation.

4.5 None of the Companies has (i) had its assets placed under administration (onder bewind gesteld), (ii) been dissolved (ontbonden), merged (gefuseerd) or split up (gesplitst), or (iii) been subjected to any one of the insolvency and winding-up proceedings listed in Annex A or Annex B to the Council Regulation EC No. 1346/2000 of 29 May 2000 on Insolvency Proceedings (together “Insolvency Proceedings”, including, inter alia, bankruptcy (faillissement)).

4.6 The entry into the Indenture by the Companies and the exercise of their rights and performance of their obligations under the Indenture will be of material commercial benefit (in het vennootschappelijk belang) to the Companies.

4.7 The written resolutions referred to in paragraph 3 were validly passed. The Companies do not have and are not required to have works council that has the right to give advice under the Works Councils Act (Wet op de ondernemingsraden).

4.8 The Indenture has been signed on behalf of the Companies by a member of their management board in office at the time of signing or by a person authorised under the Powers of Attorney.

4.9 All documents and their entry into and performance are within the capacity and powers (corporate and otherwise) of, and have been or will have been validly authorised, entered into and duly performed by, each party other than the Companies.

4.10 All documents, including any governing law provisions contained therein, are valid, binding and enforceable on each party (including the Companies) under the law to which they are expressed to be subject where that is not Dutch law, and under any other applicable law than Dutch law. Words and phrases used in those documents have the same meaning and effect as they would if those documents were governed by Dutch law.

4.11 Insofar as any obligation of the Companies under the Indenture falls to be performed in, or is otherwise affected by the laws of, any jurisdiction other than the Netherlands, their performance would not be illegal or ineffective under the laws of that jurisdiction.

4.12 There are no dealings between the parties that affect the Indenture.

4.13 The guarantee given by the Companies, and any liability accepted by the Companies, is not given or accepted with a view to (met het oog op) the acquisition by any party of shares in the share capital of the Companies or of any company of which the Companies are a direct or indirect subsidiary.

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5 Opinion

Based on the documents and assumptions referred to in paragraphs 3 and 4 and subject to the qualifications in paragraph 6 and to any matters not disclosed to us, we are of the following opinion:

5.1 Each of the Companies is existing as a private company with limited liability (besloten vennootschap met beperkte aansprakelijkheid) under Dutch law.

5.2 Each of the Companies has the corporate power to enter into and perform the Indenture.

5.3 Each of the Companies has taken all necessary corporate action to authorise its entry into and performance of the Indenture.

5.4 The Indenture has been validly signed by each of the Companies.

6 Qualifications

This opinion is subject to the following qualifications:

6.1 This opinion is limited by, and therefore we do not express any opinion or statement as to the consequences of, any Insolvency Proceeding, insolvency, liquidation (ontbinding en vereffening), reorganisation, fraudulent conveyance (Actio Pauliana) and other laws relating to or affecting the rights of creditors.

6.2 Under Dutch law, a legal act (rechtshandeling) performed by a legal entity (including (without limitation) a guarantee pursuant to which it guarantees the performance of obligations of a third party, whether or not affiliated with such third party, and any other legal act having similar effect and including (without limitation) an agreement pursuant to which it agrees to provide or provides security for its obligations under such agreement or guarantee or other act), may be nullified by any of its creditors if (a) such transactions are entered into by such debtor without a legal obligation to do so, (b) the rights of such creditors are thereby prejudiced, and (c) there is knowledge on the part of the relevant legal entity and the party with whom the transaction is made that the rights of the other creditors would be prejudiced.

6.3 If a legal act (rechtshandeling) performed by a legal entity (including (without limitation) a guarantee pursuant to which it guarantees the performance of obligations of a third party, whether or not affiliated with such third party, and any other legal act having similar effect and including (without limitation) an agreement pursuant to which it agrees to provide or provides security for its obligations under such agreement or guarantee or other act) which exceeds the entity’s objects or is not in the entity’s corporate interest (i.e. is not in furtherance of the entity’s objects), the act may (i) exceed the entity’s corporate power, (ii) violate its articles of association and (iii) be nullified by it on the basis of section 2:7 of the Dutch Civil Code if the other party or parties to the act knew or should have known that the entity’s objects were exceeded or that the act was not in the entity’s corporate interest.

6.4 Under Dutch law, a power of attorney does not preclude the principal from performing the legal acts covered by the power of attorney and can be made irrevocable only insofar as it is granted for the purpose of performing a legal act in the interest of the attorney or a third party and subject to any amendments made or limitations imposed by the court on serious grounds (gewichtige redenen). Each power of attorney (volmacht) or mandate (lastgeving), whether or not irrevocable, granted by a company, will terminate by force of law and without

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notice, upon bankruptcy of the company and cease to have effect upon the company having been granted a suspension of payments.

6.5 The trade register extracts and the confirmations referred to in paragraph 3 do not provide conclusive evidence that the information set out in the trade register extracts is correct or that none of the Companies has become the subject of an Insolvency Proceeding.

6.6 We do not express any opinion as to facts.

6.7 It should be understood that we have not been responsible for investigating or verifying the accuracy of the facts or the reasonableness of any statements of belief or opinion contained in the Prospectus, or that no material facts have been omitted from it.

7 Reliance

This opinion is addressed to you solely for your benefit in connection with the Offer. It is not to be transmitted to anyone else nor is it to be relied upon by anyone else or for any other purpose or quoted or referred to in any public document or filed with anyone without our prior written consent. We accept no responsibility or legal liability to any person other than yourselves in relation to the contents of this opinion. We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. In giving such consent, we do not hereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the U.S. Securities and Exchange Commission.

Yours faithfully,

/s/    Linklaters LLP

Linklaters LLP

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