Figure 13. Pear link from control mooring showing pitting and 

 greatly reduced thickness. 



The modified cathodic protection design is shown in Figure 14. A 

 single length of galvanized steel cable was loosely woven back and forth 

 through every sixth link of each leg and was joined to the chain approxi- 

 mately every 5 feet. On two of the legs the joints were accomplished by 

 silver soldering, and on the other they were accomplished with pipe clamps 

 (Figure 15). The advantages of joining with pipe clamps were (1 ) it was 

 faster, (2) it did not require the services of a welder, and (3) it did not 

 require heating which might slightly decrease the strength of the heated 

 link. The clamps were snapped into position and were then further tightened 

 with a screwdriver. One pipe clamp was installed by a diver at the time of 

 a later inspection to demonstrate that securing the cable underwater presented 

 no real difficulty. 



As shown in Figure 14, Legs 1 and 3 were of 2-1/4-inch cast steel 

 chain with 3/4-inch galvanized steel cables clamped to them; Legs 2 and 4 

 were of 2-1/4-inch die lock chain with 3/4-inch galvanized steel cables welded 

 to them. The cable on each leg was terminated approximately six links from 

 the Jew's harp of the anchor, rather than at the A-link nearest the anchor as in 

 the previous test, to minimize current loss to the anchor. Thus, full protection 

 of the chain was desired rather than partial or complete protection of the 

 anchor. 



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