Unclassified 



SECUBITY Classification of this page (Wh,-n Dm« 



•^„ter,;l) 





REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBEFl 



TN-145 3 



2. GOVT ACCESSION NO. 



DN587074 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (Bnd Subline} 



DEEP OCEAN CABLE BURIAL CONCEPT 

 DEVELOPMENT 



5- TYPE OF REPORT » PERIOD COVERED 



Not final; Feb 1976-Oct 1975 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHOBf.j 



P. K. Rockwell 



8. CONTRACT OR GRANT NUMBERrsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



CIVIL ENGINEERING LABORATORY 



Naval Construction Battalion Center 

 Port Hueneme, California 93043 



10. PROGRAM ELEMENT. PROJECT. TASK 

 AREA & WORK UNIT NUMBERS 



62759N; YF52. 556.003.01.008 



1 1. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Facilities Engineering Command 

 Alexandria, Virginia 22332 



12. REPORT DATE 



August 1976 



13. NUMBER OF PAGES 



74 



1*. MONITORING AGENCY NAME 4 AODRESSf// dUfeiifnl Irem Conlrolllnfl Oilier) 



15. SECURl TY CLASS. Co/ IMS i-epori; 



Unclassified 



15«. DECLASSIFICATION DOWNGRADING 

 SCHEDULE 



16. DISTRIBUTION STI'L-MEN r ...1 :h' ; hrCn-U 



Approved for public release; distribution unlimited. 



17. Distribution statement (oI rhe abalrltcl tmered /n Block 20. II dlllerenl Irom ReponJ 

 i 



IB. SUPPLEMENTARY NOTES 



19. KEY WORDS fConlinue on reverse side 11 necessary and iderttHy by block number) 



Cable burial, ocean, ocean equipment, communication cable underwater construction. 



20. ABSTRACT (Continue on reverse aide 11 necessf>ry and identity by bloclr number) 



Seafloor cable systems are failing in increasing numbers due to fishing-trawler-induced 

 damage. It has been demonstrated that the burial of seafloor cables markedly reduces the 

 incidence of damage. The objective of this work was to identify viable cable burial system 

 concepts and to perform the research and analysis necessary to select the most promising 

 approach to burying cables 3 feet deep in the seafloor to depths of 6,000 feet. The three 

 major problem areas considered were the propulsion, excavation, and running gear 

 . 



DD 1 jan'tS 1473 EDITION OF 1 NOV 65 IS OBSOLETE 



Unclassified 



ICATION OF THIS PAGE (IfTien Data En 



MBL/WHOr 



D 0301 00MD3hT 7 



