Businesses, hospitals, and households across Europe and Asia that depend on real-time digital services face a concrete vulnerability: the physical cables resting on the ocean floor that carry virtually all of their data. Disruptions to submarine cables in the Red Sea have sharpened attention on this single point of failure, raising questions about whether alternative routes can absorb the load if key links go dark. The International Cable Protection Committee, the industry body responsible for cable resilience, has stated that more than 99 percent of all digital data traffic worldwide, including the internet, travels through submarine cables.
Red Sea disruptions and the 99 percent dependency
The headline figure often cited, that more than 95 percent of internet traffic crosses oceans through seafloor cables, actually understates the case. According to the International Cable Protection Committee, the real share exceeds 99 percent. That number covers not just web browsing but financial transactions, cloud computing workloads, video conferencing, and government communications. When cables in the Red Sea were damaged, the effects rippled far beyond the immediate conflict zone because the corridor between the Suez Canal and the Bab el-Mandeb strait carries some of the densest cable clusters connecting Europe, the Middle East, and Asia.
The practical consequence for users is straightforward: fewer available cables mean higher latency, degraded video quality, and slower transaction processing. For industries that depend on millisecond-level response times, such as algorithmic trading desks and telemedicine platforms, even brief rerouting through longer paths can translate into measurable financial or clinical costs. The concentration of so much traffic through a small number of geographic chokepoints means that a single incident can affect services thousands of miles away.
A working hypothesis worth tracking is whether the Red Sea cable incidents will push at least 15 percent of Europe–Asia traffic onto new southern cable systems within 18 months. Such a shift would show up in publicly available latency measurements and traceroute data. If new cable projects along the African coast or through the Arctic accelerate their timelines, that would signal a structural change in how the internet’s physical backbone is distributed. No public dataset has yet confirmed a shift of that magnitude, but the conditions for it are in place.
Who owns the data on submarine cable traffic
The 99 percent figure comes directly from the ICPC, which issued a formal statement in response to the Red Sea events. The committee represents cable owners, operators, and governments with a shared interest in protecting undersea infrastructure. Its statement is the most authoritative public source for the global traffic-share claim, and it carries weight because ICPC members collectively operate the majority of the world’s submarine cable network.
The United Nations has separately documented the role of submarine cables in global digital connectivity, reinforcing the point that these physical links are the backbone of international communication. The UN’s work on digital infrastructure frames the issue in terms of development and equity: countries with fewer cable landing stations face higher costs and greater fragility when disruptions occur. For small or landlocked economies, reliance on a single neighboring state’s landing station can turn a technical fault or political dispute into a nationwide outage.
What is missing from the public record is granular, current-year data from national telecom regulators or cable landing station operators that would allow independent verification of the 99 percent figure with real-time traffic volumes. Cable owners such as SubCom, Alcatel Submarine Networks, and NEC typically do not publish capacity utilization data. Repair timelines and costs for the specific Red Sea cuts have not been disclosed in detail by the affected operators. Without those numbers, outside analysts cannot calculate precisely how much traffic was rerouted, for how long, or at what cost.
Satellite internet providers, including SpaceX’s Starlink and Amazon’s planned Project Kuiper constellation, are sometimes cited as alternatives. But no public dataset from ICPC members or UN agencies has documented what share of global traffic satellites absorbed during recent outages. The satellite share of total intercontinental bandwidth remains a small fraction of what submarine cables carry, and the cost per gigabit is far higher. For now, satellites function mainly as niche backup or last-mile access rather than a true substitute for fiber on the seafloor.
Gaps in cable protection and what to watch next
Several questions remain open. First, the ICPC statement addressed the Red Sea incidents but did not publish a detailed damage assessment or a timeline for full restoration of affected cables. Without that information, it is difficult to gauge how long rerouted traffic will stay on backup paths and whether those paths are approaching capacity limits. If repairs stretch over many months, temporary workarounds could harden into a semi-permanent reshaping of traffic flows.
Second, no government or international body has published a comprehensive redundancy analysis showing how much spare capacity exists on alternative routes if a major chokepoint goes offline for an extended period. The absence of that data means policymakers and businesses are making investment decisions about new cable routes based on incomplete information. Investors weighing whether to back additional paths around Africa, for example, must infer demand from outages and latency spikes rather than from transparent capacity maps.
Third, the legal framework for protecting submarine cables dates largely to the 1884 Convention for the Protection of Submarine Telegraph Cables, with updates through the United Nations Convention on the Law of the Sea. Whether those instruments provide adequate enforcement mechanisms against deliberate sabotage or collateral damage from armed conflict is an active debate among cable operators and governments, but no binding new protections have been adopted. In contested waters, operators still rely heavily on informal coordination with navies and coast guards rather than on clear, enforceable obligations.
Fourth, there is limited public information about how quickly specialized repair ships can be dispatched to different regions under various risk scenarios. Weather, port access, insurance, and security escorts all affect response times. A cluster of simultaneous incidents in multiple chokepoints could easily outstrip the available fleet, extending outages and increasing the incentive for adversaries to target cables during crises.
How businesses can respond to a fragile backbone
For businesses and IT planners who depend on low-latency connections between Europe and Asia, the practical first step is to audit which submarine cable routes their traffic actually uses. Most enterprise-grade internet service providers can supply this information on request. Knowing the physical path of critical applications allows companies to quantify their exposure to specific chokepoints such as the Red Sea, the Strait of Malacca, or the English Channel.
Once that map is in hand, organizations can negotiate service-level agreements that specify minimum route diversity. This might include commitments from carriers to maintain connections over at least two distinct cable systems that land in different countries, reducing the risk that a single cut or regulatory action takes down both paths. Where budgets allow, some firms may choose to buy capacity directly on multiple cables or through different upstream providers to avoid hidden single points of failure.
Enterprises with extremely low tolerance for disruption, such as financial exchanges or critical healthcare networks, can also explore limited satellite backup for essential control traffic. While satellites cannot replace the full bandwidth of submarine cables, a small, pre-provisioned satellite link can keep core services like authentication, messaging, and transaction queuing alive during an undersea outage. The key is to design these contingencies in advance, rather than improvising them after a cable cut.
At a policy level, governments and regulators can push for more transparency on cable capacity, outage reporting, and repair timelines. Even anonymized, aggregate data would help infrastructure planners identify where new routes are most urgently needed and how resilient existing corridors truly are. Public–private partnerships could support additional landing stations in underserved regions, reducing the concentration of risk in a handful of hubs.
The Red Sea disruptions have turned what was once an obscure engineering concern into a visible geopolitical and economic issue. As long as more than 99 percent of global digital traffic depends on a mesh of glass fibers laid across the seabed, the resilience of those fibers will shape how reliably the world’s data moves. Whether the response is incremental-more cables, more redundancy-or structural, with entirely new routes and technologies, will become clearer as operators, governments, and large users digest the lessons from this latest test of the internet’s physical backbone.
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*This article was researched with the help of AI, with human editors creating the final content.
