Table 2. Tensile Strength of Ropes 



Rope Material 



Force to Break 



Unexposed 



Anaerobic Exposure 



Aerobic Exposure 



Cotton^ 

 Dacron 



Manila Hemp 



Nylon 



Polypropylene 



1,825 



1,400 

 1,550 



725 

 635 



1,350 

 1,375 



1,150 

 1,150 







1,350 

 1,250 





 



1,310 

 1,300 



925 

 950 







1,340 

 1,350 





 



1,350 

 1,330 



1 ,025 

 1,050 



The exposed cotton and manila hemp ropes had disentegrated before the 

 tests were performed. 



Figure 1 . Specimens of insulated electric cable ready for exposure in 

 the ocean. 



