Document:

Specimen Unit Certificate

 EXHIBIT 4.1 
  

							
	 NUMBER
	  		  	UNITS
				
	 U-
	  		  		  	
			
	     SEE REVERSE FOR
 CERTAIN DEFINITIONS
	  	OCEANAUT, INC.	  	

 CUSIP
                         
 UNITS CONSISTING OF ONE SHARE OF COMMON STOCK AND ONE WARRANT TO PURCHASE ONE SHARE OF COMMON STOCK 
 THIS CERTIFIES
THAT
                                        
                                        
     is the owner of                     Units. 
 Each Unit (“Unit”) consists of one (1) share of common stock, par value $.0001 per share (“Common Stock”), of Oceanaut, Inc., a Marshall Islands corporation (the “Company”), and one
warrant (the “Warrants”). Each Warrant entitles the holder to purchase one (1) share of Common Stock for $6.00 per share (subject to adjustment). Each Warrant will become exercisable on the later of (i) , 2008 or
(ii) the earlier of the Company’s completion of a merger, capital stock exchange, asset acquisition, stock purchase or other similar business combination or the distribution of funds held by that certain trust account for the benefit of
the Company’s public stockholders, and will expire unless exercised before 5:00 p.m., New York City Time, on , 2012, or earlier upon redemption (the “Expiration Date”). The Common Stock and Warrants comprising the Units
represented by this certificate are not separately transferable prior to , 2007, subject to earlier separation in the discretion of Citigroup Global Markets Inc . The terms of the Warrants are governed by a Warrant Agreement, dated
as of , 2007, 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
	  	Oceanaut, Inc.	 	
			
		  	CORPORATE	 	
		  	THE REPUBLIC OF THE MARSHALL ISLANDS	 	
	 Chairman of the Board
	  	SEAL	 	Secretary
		  	2006	 	

 Oceanaut, Inc. 
 The Company will furnish without charge to each stockholder who so requests, a statement of the powers, designations, preferences and relative, participating, optional or other special rights of each class of stock or
series thereof of the Company and the qualifications, limitations, or restrictions of such preferences and/or rights. 
 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).Specimen Common Stock Certificate

 EXHIBIT 4.2 
  

			
	 NUMBER
	  	SHARES
		
	 [SYMBOL]
	  	

 OCEANAUT, INC. 
 INCORPORATED UNDER THE LAWS OF THE REPUBLIC OF THE MARSHALL ISLANDS 
 COMMON STOCK 

SEE REVERSE FOR 
 CERTAIN
DEFINITIONS 
  

					
	This Certifies that	 	 	 	CUSIP _________________
			
	is the owner of	 	 	 	 

 FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $.0001 EACH OF THE COMMON STOCK

 OF 
 OCEANAUT,
INC. 
 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:
	  	Oceanaut, Inc.	 	
	 	  	CORPORATE	 	 
	 	  	SEAL	 	 
	 	  	2006	 	 
	 CHAIRMAN
	  		 	SECRETARY
		  	THE REPUBLIC OF 
THE MARSHALL ISLANDS	 	

 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. 
 Oceanaut, Inc. 
 The Corporation will furnish without
charge to each stockholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of stock or series thereof of the Corporation and the qualifications, limitations, or
restrictions of such preferences and/or rights. This certificate and the shares represented thereby 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 shares of Preferred Stock (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. 
  

			
	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 capital stock 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).

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

 EXHIBIT 4.3 
 FORM OF PUBLIC WARRANT CERTIFICATE 
  

			
	NUMBER	  	WARRANTS

 THIS WARRANT CERTIFICATE (I) CANNOT BE SEPARATELY TRANSFERABLE BEFORE FIVE BUSINESS DAYS
AFTER THE EARLIER OF THE EXPIRATION OF THE UNDERWRITERS’ OVER-ALLOTMENT OPTION AND THE EXERCISE IN FULL BY THE UNDERWRITERS OF SUCH OVER-ALLOTMENT OPTION; PROVIDED, HOWEVER, THAT IN NO EVENT SHALL THIS WARRANT CERTIFICATE BE SEPARATELY
TRANSFERABLE BEFORE THE DATE ON WHICH OCEANAUT, INC. (THE “COMPANY”) FILES WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION AN AUDITED BALANCE SHEET REFLECTING RECEIPT OF THE GROSS PROCEEDS OF THE COMPANY’S INITIAL PUBLIC
OFFERING AND ISSUES A PRESS RELEASE ANNOUNCING WHEN SUCH SEPARATE TRANSFERABILITY WILL BEGIN AND (II) CANNOT BE EXERCISED IN WHOLE OR IN PART UNTIL THE LATER OF THE COMPANY’S COMPLETION OF A BUSINESS COMBINATION OR
[    ], 2008. 
  

					
	[SYMBOL]	  	 THIS WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO
 5:00 P.M. NEW YORK CITY TIME,                     , 2012
 OR UPON EARLIER REDEMPTION
	 	

 OCEANAUT, INC. 
 CUSIP                              
 WARRANT 
 THIS CERTIFIES THAT, for value received

 is the registered holder of a Warrant or Warrants expiring at 5:00 p.m., New York City Time,
                    , 2012, or upon earlier redemption (the “Warrant”), to purchase one fully paid and non-assessable share of Common
Stock, par value $.0001 per share (“Shares”), of Oceanaut, Inc., a Marshall Islands corporation (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)                 , 2008 or (ii) the consummation by the Company of an acquisition through merger, capital stock exchange,
asset acquisition, stock purchase or other business combination transaction, or a combination of any of the foregoing, of one or more vessels or operating businesses in the shipping industry that is its initial business combination and which meets
the size, timing and other criteria outlined in the Company’s registration statement on Form F-1 initially filed with the Securities and Exchange Commission on
[                ], 2007 (File No. 333-                ), as amended (“Business
Combination”), 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 at the office or agency
of the Warrant Agent, Continental Stock Transfer & Trust Company (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”); provided, that the Company shall not be obligated to deliver any securities pursuant to the exercise of a Warrant and shall have no obligation to settle a
Warrant exercise unless a registration statement under the Securities Act of 1933, as amended (the “Act”), with respect to the Common Stock is effective and a current prospectus is available for delivery to the Warrant holders. In the
event that a registration statement with respect to the Common Stock underlying a Warrant is not effective under the Act, or a current prospectus is not available, the holder of such Warrant shall not be entitled to exercise such Warrant and such
Warrant may have no value and expire worthless. The Warrant Agreement provides that, upon the occurrence of certain events, the Warrant Price and the number of Warrant Shares purchasable hereunder, set forth on the face 

 
hereof, 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 or down 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 stockholder 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 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 canceled on the books of the Company and have no further value except for the $.01 redemption price. 
  

							
	By	 		 	Oceanaut, Inc.	 	
				
		 	  	 	 CORPORATE
 THE REPUBLIC OF
 THE MARSHALL ISLANDS
	 	  
		 	Chief Executive Officer	 	 SEAL
 2006
	 	Secretary
				
		 	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 shares of Common Stock 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
sell, assign, and transfer unto 
 (PLEASE TYPE OR PRINT NAME AND ADDRESS) 
 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER) 
 and be delivered to 
 (PLEASE PRINT OR TYPE NAME AND ADDRESS) 
                     of the Warrants represented by this Warrant Certificate, and hereby irrevocably constitute and appoint
                                        
     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, NEW YORK STOCK EXCHANGE, PACIFIC STOCK
EXCHANGE OR CHICAGO STOCK EXCHANGE.

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