How a subsea cable is repaired

5 days ago

Submarine cables are categorized into data cables (fiber optic) and power cables (AC/DC), with differences in design, protection, and application.
Cable damage often results from human activities like fishing trawlers and anchor drops, though natural events like earthquakes or shark bites can also cause breaks.
Repair starts by locating the break via signal reflection for data cables or ROVs for power cables, followed by dispatch of specialized cable ships.
Shallow-water repairs use ROVs to retrieve cables, while deep-water repairs involve cutting and surfacing the cable with a grapnel before splicing on board.
Protection methods include physical shielding (e.g., metal sheathing), providing maps to fishermen, and governmental efforts to secure data transmission.

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