Unclassified 



Security Classification 



DOCUMENT CONTROL DATA -R&D 



1 h rlaialtitd) 



Naval Civil Engineering Laboratory- 

 Port Hueneme, California 93043 



Unclassified 



1EPODT TSTLE 



STATE OF THE ART OF ELECTRO-MECHANICAL CABLES 



4. DESCRIPTIVE NOTES (Typ* ot report «nd Inctutlva dsrta) 



Final; January 1972- June 19 72 



a- authomisi (Flvl nam*, mlddU Inltlml. fill niffll) 



J. R. Padilla, M. C. Hironaka, R. D. Hitchcock, J. F. Jenkins, C. L. 

 Liu, R. J. Malloy, J. F. McCartney, T. Roe, Jr., K. D. Vaudrey 



0. REPORT DATI 



August 1973 



total no. or man 76. no o p> mn 



72 57 



6« CONTBACT OM OftANT NO. 



„.PP, OJ «TNO. 3.1340-1 



••. ODiaiNATOM'i PUP-OUT NUMSIRIII 



TN-1303 



•». othem H6P»8«f noiii (Any tffiii hvmStti thifiSy be itiltnn 

 thlt rtfetl) 



10. OUTHIPJUTION ITATIMCNT 



Approved for public release; distribution unlimited. 



I luPPLIMINTlBT NOTEI 



II. JpekioaiNS MIL! T4HT ICflVlTV 



Naval Facilities Engineering 

 Command 



14 mrTfTFr 



A state-of-the-art study was made of submarine electro-mechanical cable technology. These are ocean 

 cables which include electrical cables with special strain members. The purpose of the study was to define 

 areas of deficiencies so that development programs could be initiated in selected areas. 



The approach included a literature search, and extensive interviews with electro-mechanical cable J 

 manufacturers and electro-mechanical cable users. Engineers and scientists of various disciplines from the 

 Naval Civil Engineering Laboratory participated in the study. Areas of study include: Mechanical 

 Properties, Electrical Properties, Handling, Terminations and Hardware, Maintenance and Repair, Manu- I 

 facturing, History of Electro-Mechanical Cable Development. 



The technological development of submarine electro-mechanical cables dates from the mid-nineteenth 

 century with their use as telegraph and, later, telephone cables. There is, therefore, a voluminous literature 

 on ocean bottom communication cables. The wide use of electro-mechanical cables suspended above the 

 seafloor began within the past 12 years. These cables include electro-mechanical cables deployed above the 

 seafloor and can, with a few exceptions, be included in two categories: structural cables, used as tensile I 

 members in support of structures tethered to the seafloor; and working cables, typically deployed and 

 retrieved by winch into the sea from a surface or subsurface platform. A special case of working electro- J 

 mechanical cables, oil well logging cables, have technological developments dating back to the 1930's. 



Deficiencies are still present and can be generally categorized in the four areas of: design of electro- 

 mechanical cables and terminations, specifications and testing, handling, and repair and maintenance. 



Areas of suggested electro-mechanical cable development are: (1) Testing standardization, (2) Spe-| 

 cification standardization, (3) Failure mechanisms analyses, (4) Standardize handling methods, (5) Corrosion, 

 (6) Torque balancing, (7) Develop a better field splicing technology, (8) Use os synthetics as strength 

 members, (9) High power transmission, and (10) Terminations such as connectors. 



1473 (pa§i n 



§/W §1§l.-8§7.-§8§l 





Unclassified 



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