Figure 26. Plastic rods, tubes, and pipe and rubber vacuum hose 

 with wrappings. 



Table 7. Breaking Strength of Rope Specimens Before and 

 After Deep Sea Exposure 



Rope 



Diameter 

 (in.) 



Breaking Strength (Ib)i^ 



Before Exposure 



After Exposure 



Cotton 



Manila 



Nylon 

 Polypropylene 



1/2 



1/2 



1/4 

 5/16 



1,340 



2,086 



1,900 

 1,810 



Deteriorated by 

 marine organisms 



Deteriorated by 

 marine organisms 



1,480 



1,750 



\J Average of two specimens for each test. 



33 



