Submarine Cable
Fiber-optic communication cables laid on the seabed, carrying roughly 99% of global intercontinental data transmission and serving as the physical backbone infrastructure of the global internet.
Timeline (last 90 days)
In shallow-sea areas, because fishing activity is intensive, submarine cables use thicker armor and are buried 1 to 3 meters below the seabed.
On the continental slope at water depths of 200 to 1,500 meters, submarine cables often cannot be fully buried, making it a danger zone most vulnerable to ship anchors and trawling, and most publicly reported break incidents are concentrated at the edge of the continental shelf.
The cost per bit of satellite links is far higher than that of submarine cables, and they are constrained by spectrum resources, weather attenuation and orbital capacity, so satellites are better suited to burst backup, polar or remote-area access and other scenarios rather than backbone international traffic.
Repairing a deep-sea cable usually requires a specialized repair ship and takes weeks or even months.
In shallow-sea areas (usually less than 200 meters deep), undersea cables are easily damaged by anchor chains, trawlers, or even submersibles, and historically there have been multiple major network outages caused by accidental anchor chains.
Undersea cables carry about 99% of intercontinental data transmission.
There are currently about 500 undersea cable systems in use worldwide, with a total length exceeding 1.3 million kilometers.
Submarine cables carry more than 95% of intercontinental data transmission.
Submarine cables have a diameter of approximately 69 millimeters, contain multiple optical fibers, and are laid on the seabed.
There are approximately 400 submarine cables worldwide with a total length exceeding 1.3 million kilometers.
All Facts (11)
全球超过95%的洲际数据流量由海底光缆承载
85%Unverified一条现代海底光缆的总容量可达200-400 Tbps
75%UnverifiedThe cost per bit of satellite links is far higher than that of submarine cables, and they are constrained by spectrum resources, weather attenuation and orbital capacity, so satellites are better suited to burst backup, polar or remote-area access and other scenarios rather than backbone international traffic.
50%UnverifiedOn the continental slope at water depths of 200 to 1,500 meters, submarine cables often cannot be fully buried, making it a danger zone most vulnerable to ship anchors and trawling, and most publicly reported break incidents are concentrated at the edge of the continental shelf.
50%UnverifiedIn shallow-sea areas, because fishing activity is intensive, submarine cables use thicker armor and are buried 1 to 3 meters below the seabed.
50%UnverifiedThere are currently about 500 undersea cable systems in use worldwide, with a total length exceeding 1.3 million kilometers.
50%UnverifiedIn shallow-sea areas (usually less than 200 meters deep), undersea cables are easily damaged by anchor chains, trawlers, or even submersibles, and historically there have been multiple major network outages caused by accidental anchor chains.
50%UnverifiedRepairing a deep-sea cable usually requires a specialized repair ship and takes weeks or even months.
50%UnverifiedUndersea cables carry about 99% of intercontinental data transmission.
50%UnverifiedSubmarine cables carry more than 95% of intercontinental data transmission.
50%UnverifiedSubmarine cables have a diameter of approximately 69 millimeters, contain multiple optical fibers, and are laid on the seabed.
50%