Final design, engineering, installation and commissioning of the largest offshore impressed current cathodic protection retrofit ever undertaken is described. The project was completed in 1987 using tensioned steel supporting ropes with tubular mixed metal oxide anodes. Each of the four platforms in the complex was protected with 10 tensioned assemblies for a maximum design current output per platform of 5250 amps. Installation was completed in one month; the system is operating at 70% of design capacity with uniform protection.

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