10 20 30 40 



Distance of Maximum Horizontal Projection (ft) 



Figure 16. Maximum horizontal projection of mooring leg. 



Cable Sheaths and Coverings 



Submarine cables usually have a water-resistant covering over their 

 insulation as added protection. Neoprene or polyethylene may be used for 

 this purpose. Where additional mechanical strength and abrasion resistance 

 is required, the cable covering is wrapped with armor wire of bronze, copper, 

 stainless steel, or galvanized steel. An additional covering is applied to pro- 

 tect the armor from the sea environment. High-strength galvanized steel with 

 polyethylene covering was selected as the armor material. 



Electrical Properties 



The use of either three single-conductor cables or a single three- 

 conductor cable is feasible for an underwater power transmission system. The 

 costs involved in deploying three single-conductor cables are greater than those 

 involved in deploying one three-conductor cable. In addition, three single 

 conductors have a higher reactance than one three-conductor cable. Off-the- 

 shelf three-conductor cables with standard conductor wires were considered 

 in the study. 



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