Subsea cable repairs start by locating the fault, usually from outages and cable testing. Fiber-optic data cables are then pinpointed with light pulses, while power cables may need fault-detection instruments or an ROV. A cable ship retrieves the damaged section, engineers splice in replacement cable on board, and the repaired line is lowered back to the seabed. The article also explains why cables fail, how ships and fishing gear damage them, and the protections used to reduce future breaks. [onesteppower.com]
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