result, only the partial potential profile listed in Table 1 1 was achieved. All 

 measurements were well above the desired minimum of -850 mv, and all 

 except one were -900 mv or above. 



Table 1 1. Partial Potential Profile of Mooring With Specialized Zinc 

 Anodes and Four Cables 4 Months After Relocation 



Reading 

 No.'' 



Potential (mv) on — 



Riser-Chain 



Leg 1 



Leg 2 



Leg 3 



Leg4'' 



1 



-960^ 



-905'' 



-905'' 



-905'' 



-905'' 



2 



-940 



-905 



-900 



-910 



-980 



3 



-940 



-950'' 



-960^^ 



-970'' 



-910 



4 



-1,005^ 



-900 



-910 



-920 



-910 



5 



-905'' 



-900 



-910 



-920 



-920 



6 



- 



-900 



-915 



-920 



-920 



7 



- 



-900^^ 



-915 



-920 



-920 



8 



- 



- 



-920 



-920 



-920 



9 



- 



- 



-920 



-920 



-920 



10 



- 



- 



-geo*^ 



-975'' 



-925 



11 



- 



- 



-910 



-910 



-925 



12 



- 



- 



-910 



-910 



-920 



13 



- 



- 



-900 



-920 



-920 



14 



- 



- 



-900 



-920 



-920 



15 



- 



- 



-900 



-915 



-920 



16 



- 



- 



-880 



-915 



-920 



17 



- 



- 



-Qm^'S 



-960'' 



-gso"" 



18 



- 



- 



- 



-905 



-930 



19 



- 



- 



- 



-905 



-925 



20 

 21 



- 



- 



— 



-900 

 -880^ 



-920 

 -660'^ 



" Readings taken about every 10 to 20 feet. 

 '' Two anodes in the mud could not be located. 

 " At buoy. 

 '' At ground ring. 



'' At link on which anode was cast. 



f Leg lost in mud; unable to repeat measurement because of engine failure. 

 ^ Measurements discontinued because of engine failure. 

 At anchor. 



31 



