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Invisible infrastructure of submarine cables reveals the fragility of African connection and highlights the role of specialized ships in critical repairs on the seabed, essential for keeping digital, financial services and communications running in the face of recurring failures.
When submarine cables break off the African coast, the fragility of digital connectivity ceases to be abstract and starts affecting millions of users, requiring an immediate response from specialized structures that operate out of sight and in extreme conditions.
Among these structures, the Léon Thévenin stands out, a vessel from Orange Marine based in Cape Town, frequently called upon for critical maintenance operations that ensure the continuity of data flow in regions highly dependent on these submarine routes.
Although the term “cloud” suggests something intangible, the reality of the global internet is anchored in physical cables installed on the ocean floor, responsible for sustaining essential communications ranging from banking transactions to public services and digital platforms.
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According to industry data, more than 95% of intercontinental data traffic travels through this submarine infrastructure, highlighting the immediate impact any rupture can have on economies and connected systems around the world.
Léon Thévenin Ship and its Role in Internet Maintenance
Built in 1983, the Léon Thévenin is 107 meters long and was designed to perform complex cable laying and repair operations, combining traditional structure with modern navigation and stability technologies.
Equipped with a dynamic positioning system, the ship can remain almost stationary over a specific point in the ocean, even under adverse conditions, which is crucial for precise interventions at great depths.
Although it does not single-handedly support the African internet, its operation is part of a critical maintenance network, especially in regions where there is less cable redundancy and greater vulnerability to prolonged interruptions.
In these scenarios, its presence becomes decisive, as the restoration of connectivity depends on technical operations that require specialized equipment, complex logistics, and highly trained teams.
Failures in Submarine Cables in Africa and Regional Impact
The extent of this risk became evident in March 2024, when simultaneous failures hit the WACS, ACE, SAT-3, and MainOne cables, compromising connectivity in several West and Central African countries.
As a consequence, entire regions faced instability or disruption of digital services, affecting economic activities, communications, and essential systems in countries like Nigeria, Ghana, Ivory Coast, Liberia, and Benin.
Faced with reduced traffic capacity, operators had to reroute data through alternative routes, which is not always sufficient to maintain the normal performance of networks on a large scale.
Information released by industry companies indicated that the rupture occurred in the Atlantic, near the Ivory Coast, with initial indications of possible seismic activity on the seabed as a contributing factor.
How Submarine Cable Repair Works
Locating and correcting a fault in submarine cables involves a rigorous technical sequence that begins with identifying the exact point of damage through measurements made remotely from the affected networks.
Once the area is defined, the ship proceeds to the location and begins the search operation, using equipment capable of reaching great depths and retrieving the compromised section of the cable.
After being hoisted, the damaged segment is removed and replaced with a new section, in a process that requires millimeter precision to ensure the continuity of data transmission without loss of quality.
Additionally, the splice must ensure both the integrity of the optical fibers and the external protection of the cable, preventing the same fault from recurring after reinstallation on the seabed.
After the 2024 incidents, recovery times varied according to the affected system, with restorations occurring between April and May, depending on the complexity of each intervention and the environmental conditions encountered.
Global internet infrastructure and its vulnerable points
Even with the continuous expansion of the global submarine cable network, the infrastructure still presents vulnerable points, especially in regions with fewer alternative routes available for traffic redistribution.
Factors such as ship anchors, trawling, submarine landslides, and geological phenomena remain among the main causes of damage, reinforcing the need for constant monitoring and rapid response capability.
In this context, the longevity of the Léon Thévenin does not represent an operational limitation, as the vessel has been updated with systems that ensure efficiency and precision compatible with current industry demands.
Operated by Orange, the ship brings together technological resources that allow it to perform complex interventions at sea, remaining a relevant piece in a chain that sustains global connectivity.
Thus, the dependence on physical structures and specialized maritime operations demonstrates that the internet, despite appearing instantaneous, remains deeply linked to logistical and technical processes that occur outside the direct reach of users.
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