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Exhibit 4.1    
    

	NUMBER	 	 	 	UNITS
	

VTG-U	
 	

 	
 	

 
	

SEE REVERSE FOR CERTAIN DEFINITIONS	
 	

       
 VANTAGE DRILLING COMPANY	
 	

 
	 	 	 	 	CUSIP

	 

UNITS CONSISTING OF ONE ORDINARY SHARE AND ONE WARRANT TO PURCHASE ONE ORDINARY SHARE  

THIS CERTIFIES THAT

    

is
the owner of                        Units. 

Each
Unit ("Unit") consists of one (1) ordinary share, par value $0.001 per share ("Ordinary Share"), of Vantage Drilling Company, a Cayman Islands exempted company (the "Company"), and one
warrant (a "Warrant"). Each Warrant entitles the holder to purchase one (1) Ordinary Share for $6.00 per share (subject to adjustment). Each Warrant will become exercisable on the later of
(i) May 24, 2008 and (ii) the Company's completion of an initial merger, capital stock exchange, asset or stock acquisition, exchangeable share transaction, joint venture or other
similar business combination, and will expire unless exercised before 5:00 p.m., Eastern Time, on May 24, 2011 or earlier upon redemption. The Ordinary Shares and Warrants comprising the
Units represented by this certificate will begin separate trading as soon as practicable following [                        ],
2008 [the effective
date of the registration statement]. The terms of the Warrants are governed by a Warrant Agreement, dated as of
[                        ], between
the Company and Continental Stock Transfer & Trust Company as Warrant Agent, and are subject to the terms and provisions contained therein, all of which terms and provisions the holder of this
certificate consents to by acceptance hereof. Copies of the Warrant Agreement are on file at the office of the Warrant Agent at 17 Battery Place, New York, New York 10004, and are available to any
Warrant holder on written request and without cost. 

This
certificate is not valid unless countersigned by the Transfer Agent and Registrar of the Company. 

Witness
the facsimile seal of the Company and the facsimile signature of its duly authorized officers. 

	By	 	 	 	Vantage Drilling Company	 	 
	 	 	 	 	CORPORATE	 	 
	 	 	
	 	CAYMAN ISLANDS	 	

	 	 	Chief Executive Officer	 	SEAL	 	Secretary
	 	 	 	 	2007	 	 

Vantage Drilling Company  

The
following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: 

	TEN COM -	 	as tenants in common	 	UNIF GIFT MIN ACT -                        Custodian
	TEN ENT -	 	as tenants by the entireties	 	                   (Cust)	 	                   (Minor)
	JT TEN -	 	as joint tenants with right of survivorship	 	under Uniform Gifts to Minors Act
	 	 	and not as tenants in common	 	 	 	 
	 	 	 	 	 	 	

	 	 	 	 	 	 	(State)

Additional
Abbreviations may also be used though not in the above list. 

For value received,
                                      hereby sell, assign
and transfer unto  

PLEASE INSERT SOCIAL SECURITY OR

OTHER

IDENTIFYING NUMBER OF ASSIGNEE 

(PLEASE
PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) 

Units  

represented by the within Certificate, and do hereby irrevocably constitute and appoint  

                                        
                  Attorney to transfer the said Units on the books of the within named Company will full power of substitution in the
premises.

	Dated	 	 	 	 	 	 
	 	 	
	 	 	 	 
	

 	
 	

 	
 	

 	
 	

 
	 	 	 	 	

	 	 	 	 	Notice:	 	The signature to this assignment must correspond with the name as written upon the face of the certificate in every particular, without alteration or enlargement or any change whatever.

Signature(s)
Guaranteed: 

                                        
                                          
                                      

THE
SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15). 

The
holder of this certificate shall be entitled to receive funds from the trust account only in the event that the Corporation is liquidated because it does not consummate a business combination or
the holder seeks to convert his, her or its respective shares into cash upon a business combination which he, she or it voted against and which is actually completed by the Corporation. In no other
circumstances shall the holder have any right or interest of any kind in or to the trust account. 

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Exhibit 4.2    
    

	NUMBER	 	 	 	SHARES
	
VTG	
 	

 	
 	

 
	 	 	VANTAGE DRILLING COMPANY

INCORPORATED UNDER THE LAWS OF THE CAYMAN ISLANDS

ORDINARY SHARES	 	 
	 	 	 	 	SEE REVERSE FOR

CERTAIN DEFINITIONS
	 	 	 	 	CUSIP

This Certifies that  

is the owner of  

FULLY PAID AND NON-ASSESSABLE SHARES, PAR VALUE $.001 PER SHARE

OF

VANTAGE DRILLING COMPANY  

transferable on the books of the Corporation in person or by duly authorized attorney upon surrender of this certificate properly endorsed. This certificate is not valid unless
countersigned by the Transfer Agent and registered by the Registrar. Witness the seal of the Corporation and the facsimile signatures of its duly authorized officers.

	Dated:	 	Vantage Drilling Company	 	 
	 	 	CORPORATE

SEAL

2007	 	 
	
	 	 	 	

	CHIEF EXECUTIVE OFFICER	 	 	 	SECRETARY
	 	 	CAYMAN ISLANDS	 	 

Vantage Drilling Company  

The
Corporation will furnish without charge to each shareholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of
shares or series thereof of the Corporation and the qualifications, limitations or restrictions of such preferences and/or rights. This certificate and the shares represented hereby are issued and
shall be held subject to all the provisions of the Certificate of Incorporation and all amendments thereto and resolutions of the Board of Directors providing for the issue of preferred shares (copies
of which may be obtained from the secretary of the Corporation), to all of which the holder of this certificate by acceptance hereof assents. 

The
following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: 

	TEN COM -	 	as tenants in common	 	UNIF GIFT MIN ACT	 	                             Custodian
	TEN ENT -	 	as tenants by the entireties	 	 	 	(Cust)                             (Minor)
	JT TEN -	 	as joint tenants with right of survivorship and not as tenants in common	 	 	 	under Uniform Gifts to Minors Act

(State)

Additional
Abbreviations may also be used though not in the above list. 

For
value received,                             hereby sell, assign and transfer unto 

PLEASE
INSERT SOCIAL SECURITY OR OTHER

IDENTIFYING NUMBER OF ASSIGNEE 

(PLEASE
PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) 

shares  

of the ordinary shares represented by the within Certificate, and do hereby irrevocably constitute and appoint  

 Attorney  

to transfer the said stock on the books of the within named Corporation will full power of substitution in the premises.

	Dated	 	 	 	 
	 	 	
	 	 
	

 	
 	

 	
 	

 
	 	 	 	 	

	 	 	 	 	Notice: The signature to this assignment must correspond with the name as written upon the face of the certificate in every particular, without alteration or enlargement or any change
whatever.

Signature(s)
Guaranteed: 

THE
SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15). 

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Exhibit 4.3    
    

	NUMBER	 	(SEE REVERSE SIDE FOR LEGEND)	 	WARRANTS
	

VTG-WS	
 	

THIS WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO

5:00 P.M. EASTERN TIME, MAY 24, 2011

OR UPON EARLIER REDEMPTION	
 	

 
	

 	
 	

Vantage Drilling Company	
 	

 
	 	 	 	 	CUSIP

WARRANT  

THIS
CERTIFIES THAT, for value received 

is
the registered holder of a Warrant or Warrants expiring at 5:00 p.m., Eastern Time, May 24, 2011, or upon earlier redemption (the "Warrant"), to purchase one fully paid and
non-assessable ordinary share, par value $0.001 per share ("Shares"), of Vantage Drilling Company, a Cayman Islands exempted company (the "Company"), for each Warrant evidenced by this
Warrant Certificate. The Warrant entitles the holder thereof to purchase from the Company, commencing on the later of (i) May 24, 2008 and (ii) the completion by the Company of an
initial acquisition through merger, capital stock exchange, asset or stock acquisition, exchangeable share transaction, joint venture or other similar transaction, or a combination of any of the
foregoing, of one or more operating businesses, such number of Shares of the
Company at the price of $6.00 per share, upon surrender of this Warrant Certificate accompanied by the annexed duly executed subscription form and payment of the Warrant Price (as hereinafter defined)
at the office or agency of the Warrant Agent, 17 Battery Place, New York, New York 10004 (such payment to be made by check made payable to the Warrant Agent), but only subject to the conditions set
forth herein and in the Warrant Agreement between the Company and Continental Stock Transfer & Trust Company (the "Warrant Agreement"). In no event shall the registered holder of this Warrant
be entitled to receive a net-cash settlement, ordinary shares or other consideration in lieu of physical settlement in Shares of the Company. The Warrant Agreement provides that upon the
occurrence of certain events the Warrant Price and the number of Warrant Shares purchasable hereunder, may, subject to certain conditions, be adjusted. The term Warrant Price as used in this Warrant
Certificate refers to the price per Share at which Shares may be purchased at the time the Warrant is exercised. 

No
fraction of a Share will be issued upon any exercise of a Warrant. If the holder of a Warrant would be entitled to receive a fraction of a Share upon any exercise of a Warrant, the Company shall,
upon such exercise, round up to the nearest whole number the number of Shares to be issued to such holder. 

Upon
any exercise of the Warrant for less than the total number of full Shares provided for herein, there shall be issued to the registered holder hereof or his assignee a new Warrant Certificate
covering the number of Shares for which the Warrant has not been exercised. 

Warrant
Certificates, when surrendered at the office or agency of the Warrant Agent by the registered holder hereof in person or by attorney duly authorized in writing, may be exchanged in the manner
and subject to the limitations provided in the Warrant Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor and evidencing in the
aggregate a like number of Warrants. 

Upon
due presentment for registration of transfer of the Warrant Certificate at the office or agency of the Warrant Agent, a new Warrant Certificate or Warrant Certificates of like tenor and
evidencing in the aggregate a like number of Warrants shall be issued to the transferee in exchange for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without
charge except for any applicable tax or other governmental charge. 

The
Company and the Warrant Agent may deem and treat the registered holder as the absolute owner of this Warrant Certificate (notwithstanding any notation of ownership or other writing hereon made by
anyone), for the purpose of any exercise hereof, of any distribution to the registered holder, and for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice
to the contrary. 

This
Warrant does not entitle the registered holder to any of the rights of a shareholder of the Company. 

The
Company reserves the right to redeem all (but not part) of the then outstanding Warrants, with a notice of redemption in writing to the holders of record of the Warrants then outstanding, giving
30 days' notice of such redemption at any time after such Warrants become exercisable if the last sale price of the Shares has been at least $11.50 per share on each of 20 trading days within a
30 trading day period ending on the third business day prior to the date on which notice of such redemption is given. The Company may not redeem the Warrants unless the Warrants comprising the units
sold in this offering and the ordinary shares underlying those Warrants are covered by an effective registration statement from the beginning of the measurement period through the date fixed for the
redemption. The redemption price of the Warrants is to be $.01 per Warrant. Any Warrant either not exercised or tendered back to the Company by the end of the date specified in the notice of
redemption shall be cancelled on the books of the Company and have no further value except for the $.01 redemption price. 

	By:	 	Vantage Drilling Company	 	 
	 	 	CORPORATE

CAYMAN ISLANDS	 	 
	
	 	 	 	

	Chief Executive Officer	 	SEAL	 	Secretary
	 	 	2007	 	 

COUNTERSIGNED:

Continental
Stock Transfer & Trust Company,

as Warrant Agent 

                                        
                  

Authorized
Officer 

SUBSCRIPTION FORM  

To
Be Executed by the Registered Holder in Order to Exercise Warrants 

The
undersigned Registered Holder irrevocably elects to
exercise                                    Warrants represented by
this Warrant Certificate, and to purchase the ordinary shares issuable upon the exercise of such
Warrants, and requests that Certificates for such shares shall be issued in the name of 

(PLEASE
TYPE OR PRINT NAME AND ADDRESS) 

(SOCIAL
SECURITY OR TAX IDENTIFICATION NUMBER) 

and
be delivered to 

(PLEASE
PRINT OR TYPE NAME AND ADDRESS) 

and,
if such number of Warrants shall not be all the Warrants evidenced by this Warrant Certificate, that a new Warrant Certificate for the balance of such Warrants be registered in the name of, and
delivered to, the Registered Holder at the address stated below: 

	Dated:	 	 	 	 
	 	 	
	 	

	 	 	 	 	(SIGNATURE)
	

          	
 	

 	
 	

 
	 	 	 	 	

	 	 	 	 	(ADDRESS)
	

          	
 	

 	
 	

 
	

          	
 	

 	
 	

 
	 	 	 	 	

	 	 	 	 	(TAX IDENTIFICATION NUMBER)

ASSIGNMENT  

To
Be Executed by the Registered Holder in Order to Assign Warrants 

For
Value Received,                                    hereby sells,
assigns, and transfers unto 

(PLEASE
TYPE OR PRINT NAME AND ADDRESS) 

(SOCIAL
SECURITY OR TAX IDENTIFICATION NUMBER) 

                                        
                  of
the Warrants represented by this Warrant Certificate, and hereby irrevocably constitutes and
appoints                                    Attorney to transfer this
Warrant Certificate on the books of
the Company, with full power of substitution in the premises. 

	Dated:	 	 	 	 
	 	 	
	 	

	 	 	 	 	(SIGNATURE)

THE
SIGNATURE TO THE ASSIGNMENT OF THE SUBSCRIPTION FORM MUST CORRESPOND TO THE NAME WRITTEN UPON THE FACE OF THIS WARRANT CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY
CHANGE WHATSOEVER, AND MUST BE GUARANTEED BY A COMMERCIAL BANK OR TRUST COMPANY OR A MEMBER FIRM OF THE AMERICAN STOCK EXCHANGE OR THE NEW YORK STOCK EXCHANGE. 

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Exhibit 4.3

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