Most people don’t realize that roughly 500 cables stretch across the ocean floor today – a number that sounds modest, yet these cables connect continents and keep the digital economy running. They carry data essential for stock exchanges, financial transactions, video streaming, everyday communication, and the smooth functioning of tech companies and government institutions.
Infrastructure that a decade ago could more or less keep up with rising demand is now aging faster than it is being upgraded. Repairs to damaged cables can take weeks, sometimes even longer if the break occurs in difficult conditions or far from service vessels.
Rising bandwidth demand is making the situation worse. Artificial intelligence, big-data analytics, cloud communication and video streaming are driving traffic volumes that are growing faster than many existing routes can support. Cables originally designed for the scale of yesterday’s internet are now pushed to their limits – and sometimes beyond.
The threats, however, go far beyond simple overload. Many cables are damaged by ship activity – for example, anchors dragging along the seabed – as well as by earthquakes or underwater landslides. On top of that come geopolitical tensions: key routes pass through narrow straits where disruptions can have immediate global consequences. In some regions, there is a real risk of deliberate interference with cable infrastructure as part of geopolitical conflict.
Another bottleneck is the governance model. A significant portion of the world’s undersea cables is financed and controlled by private companies, including major cloud service providers. This accelerates infrastructure development, but it also makes coordinated responses to threats – and investment in redundant routes – more difficult. As new technologies, including AI, increase bandwidth requirements, the gap between what the world needs and the actual condition of its cables becomes increasingly visible.
If the current pace of internet growth continues over the next few years, the global communications infrastructure may turn out to be far more fragile than most people assume. A series of incidents in just a handful of strategic locations could cut off large parts of the world from stable connectivity – with consequences ranging from slower speeds to severe outages of key digital services. At a time when nearly all of us live online, the stability of the cables lying on the ocean floor has quietly become one of the fundamental pillars of the modern internet.