When the fishing boat pulled anchor, the submarine optical cable was accidentally pulled off. This accident caused the signal reception of cable TV subscribers in many regions to be blocked, which lasted for nearly 4 days.
Submarine optical cable is a conductor wrapped with insulating material laid on the seabed, usually buried 1 to 2 meters below the seabed, to establish telecommunication transmission across the ocean. In recent years, the phenomenon of "strikes" of submarine optical cables has occurred from time to time, and the vulnerability of submarine optical cables is worrying.
submarine cable
Why are submarine optical cables so fragile? Take the Asia-Pacific Rim region, where submarine optical cables have the most serious hidden dangers, as an example. This region is one of the world's earthquake-prone areas, and submarine optical cables are prone to displacement or rupture during earthquakes.
The vast majority of offshore cable accidents are caused by marine operations such as fishing and ship anchoring, especially the large iron anchors used for sailing nets on some fishing ships are the most dangerous. This kind of iron anchor weighs two or three tons, and the so-called "sail net" is to use this big iron anchor to drag a huge canvas "parachute" into the sea. Fiber optic cable torn.
Submarine optical cable breaks occur every year, and several of the optical cables landed in Shanghai in the East China Sea and the Yellow Sea have been broken and then reconnected. The submarine optical cable that has been broken is even more fragile. The repaired fiber optic cable will float on the seabed and is more likely to be damaged by iron anchors or other things that go down to the seabed. In the late 1980s, there were also instances where the polyethylene insulator of a deep-sea optical cable was bitten by a shark, causing a power failure.
