EX-4.3



 Exhibit 4.3 

FOURTH SUPPLEMENTAL INDENTURE 

(TO SECOND LIEN INDENTURE) 

FOURTH SUPPLEMENTAL INDENTURE (this “Third Supplemental Indenture”) dated as of March 20, 2014, among Road Raiders
Transportation, Inc., a Delaware corporation, Road Raiders Inland, Inc., a Delaware corporation, Road Raiders Technology, Inc., a Delaware corporation, and Road Raiders Logistics, Inc., a Delaware corporation (collectively, the “New
Guarantors”), each a subsidiary of HORIZON LINES, LLC (or its successor), a Delaware corporation (the “Issuer”), and U.S. BANK NATIONAL ASSOCIATION, a national banking association, as trustee under the indenture referred to below (the
“Trustee”). 
 W I T N E S S E T H : 

WHEREAS the Issuer (or its successor) has heretofore executed and delivered to the Trustee an indenture (as amended, supplemented or otherwise
modified, the “Indenture”) dated as of October 5, 2011, providing for the issuance of the Issuer’s Second Lien Senior Secured Notes due 2016 (the “Notes”), initially in an aggregate principal amount of $100,000,000;

 WHEREAS Section 4.18 of the Indenture provides that under certain circumstances the Issuer is required to cause the New Guarantors
to execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantors shall unconditionally guarantee all the Issuer’s Obligations under the Notes and the Indenture pursuant to a Note Guarantee on the terms and
conditions set forth herein; and 
 WHEREAS pursuant to Section 11.01 of the Indenture, the Trustee, the Issuer and other existing
Guarantors, if any, are authorized to execute and deliver this Fourth Supplemental Indenture; 
 NOW THEREFORE, in consideration of the
foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Guarantors, the Issuer and the Trustee mutually covenant and agree for the equal and ratable benefit of the holders of the Notes as
follows: 
 1. Defined Terms. As used in this Fourth Supplemental Indenture, terms defined in the Indenture or in the preamble or recital
hereto are used herein as therein defined, except that the term “holders” in this Fourth Supplemental Indenture shall refer to the term “holders” as defined in the Indenture and the Trustee acting on behalf of and for the benefit
of such holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Fourth Supplemental Indenture refer to this Fourth Supplemental Indenture as a whole and not to any particular
section hereof. 
 2. Agreement to Guarantee. The New Guarantors hereby agree, jointly and severally with each other and all existing
guarantors (if any), to unconditionally guarantee the Issuer’s Obligations under the Notes and the Indenture on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions
of the Indenture and the Notes and to perform all of the obligations and agreements of guarantors under the Indenture. 







 3. Notices. All notices or other communications to the New Guarantors shall be given as provided
in Section 17.03 of the Indenture. 
 4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly
amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Fourth Supplemental Indenture shall form a part of the Indenture for all
purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 
 5. Governing Law. THIS
FOURTH SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. 

6. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Fourth Supplemental
Indenture. 
 7. Counterparts. The parties may sign any number of copies of this Fourth Supplemental Indenture. Each signed copy shall be an
original, but all of them together represent the same agreement. 
 8. Effect of Headings. The Section headings herein are for convenience
only and shall not affect the construction thereof. 

  
 2 








 IN WITNESS WHEREOF, the parties hereto have caused this Fourth Supplemental Indenture to be duly
executed as of the date first above written. 
  

			
	 HORIZON LINES, LLC

		
	 By:
	 	 /s/ Robert Vass

	 Name: Robert Vass
 Title: Assistant
Secretary



 [Signature Page to Fourth Supplemental Indenture to Second Lien Indenture] 







 
			
	 ROAD RAIDERS TECHNOLOGY, INC.

		
	 By:
	 	 /s/ Jeffrey R. Yeager

	 Name: Jeffrey R. Yeager

Title: President and Secretary




  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture] 








 
			
	 ROAD RAIDERS TRANSPORTATION, INC.

		
	 By:
	 	 /s/ Gary L. Jensen

	 Name: Gary L. Jensen

Title: President and Secretary




  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture] 








 
			
	 ROAD RAIDERS LOGISTICS, INC.

ROAD RAIDERS INLAND, INC.

		
	 By:
	 	 /s/ Chris J. Dianora

	 Name: Chris J. Dianora

Title:   President, Road Raiders Logistics, Inc.

            Vice President, Road Raiders Inland,
Inc.




  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture] 








 
			
	 U.S. BANK NATIONAL ASSOCIATION,

as Trustee

		
	 By:
	 	 /s/ K. Wendy Kumar

	 Name: K. Wendy Kumar

Title: Vice President




  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture]