Figure 15. Cable clamped to chain link and a clamp shown prior to use. 



Performance. A potential profile of the modified mooring was made 

 approximately 3 weeks after the mooring was laid, giving the data listed in 

 Table 7. It can be seen from these data that all readings were well above the 

 desired minimum level of -850 mv and most were above -1 ,000 mv. Two of 

 the four anchors were also receiving cathodic protection despite the attempt 

 to prolong anode life by avoiding this. 



Additional potential profiles were prepared 4, 10, and 13 months 

 after installation of the modified mooring. These are shown in Tables 8, 9, 

 and 10, respectively. From these tables it can be seen that the underwater 

 portion of the buoy, the riser-chain, and all four ground legs were receiving 

 full protection from corrosion. All potentials were well above the desired 

 minimum level of -850 mv, and almost all were above -900 mv. In addition, 

 two of the four anchors were receiving full protection much of the time, 

 despite attempts to avoid it. 



25 



