Figure 16. Cleaned buoy 23 months after relocation. Note the lost 

 section of lower fender, the anode in the sea chest, and 

 the square of bare steel. 



About one-third of the zinc anodes in the sea chests had been lost, 

 and only about one-tenth of the zinc anodes on the riser-chain (Figure 17) 

 had been lost. The divers who assisted in measuring the potentials indicated 

 that the anodes on the ground legs were in a similar condition. 



The riser-chain and ground ring assembly were in excellent condition 

 (Figure 17) with no apparent corrosion. The chain diameter remained at 

 2-1/2 inches. The ends of the four steel cables that terminated near the 

 ground ring had been pulled loose from their connections to the chains. 

 Welds had been broken from two of the legs, and the cables had been pulled 

 from the cable clamps that remained on the other two legs. This area still 

 had sufficient electrical continuity for complete cathodic protection. 



36 



