Appendix D 

 CABLE AND MACHINE DRAG 



CABLE DRAG 



The drag on the umbilical cable was determined using the following 

 assumptions. 



Cable diameter = 3 in. 



Cable weight = 0.64 lb/ft 



Water depth = 6,000 ft 



System velocity = 1.69 ft/sec 



Current velocity = 3.38 ft /sec at surface 

 = at 300 ft 



Vehicle weight = 20,000 lb 



It was also assumed that the support ship is located directly above the 

 cable burial machine. The configuration and current profile are shown 

 in Figure D-1 . 



Figure D-1. Current profile. 



70 



