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To answer this, I’ll start with quote from Henry David Thoreau: Why are there many cables between some continents but no cables between Australia and South America, for instance?

If we use South Africa as an example, two cables connect on the west coast, while three extend from the east coast. As you will see on the map, nearly all countries that have a coastline are connected to a submarine cable.Ĭountries must have multiple cables to ensure reliable connectivity in case there is damage to a cable.

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We’re constantly updating this free resource to illustrate the world’s active and planned cables. The best way to answer this is to visit TeleGeography’s Submarine Cable Map. In contrast, others are incredibly long, such as the 20,000 kilometer Asia America Gateway cable.

Some cables are quite short, like the 131 kilometer CeltixConnect cable between Ireland the United Kingdom. Of course, considerable care is taken to ensure cables follow the safest path to avoid fault zones, fishing zones, anchoring areas, and other dangers. To reduce inadvertent damage, the undersea cable industry also spends a lot of time educating other marine industries on the location of cables.Įxample Trans-Atlantic cable route seabed profile How many kilometers of cable are there?Īs of 2021, we believe there are over 1.3 million kilometers of submarine cables in service globally. Nearer to the shore cables are buried under the seabed for protection, which explains why you don’t see cables when you go the beach, but in the deep sea they are laid directly on the ocean floor. These fibers are sheathed in a few layers of insulation and protection. Cables laid nearer to shore use extra layers of armoring for enhanced protection.ĭo the cables actually lie on the bottom of the ocean floor? The filaments that carry light signals are extremely thin - roughly the diameter of a human hair. Parts of a submarine cable How thick are undersea cables?įor most of its journey across the ocean, a cable is typically as wide as a garden hose.

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