1.3 million km. Enough to run 32 times Earth’s circumference at the equator. Beneath Earth’s seas lies a rapidly expanding network of high-voltage subsea cables—critical infrastructure enabling offshore wind integration, cross-border electricity flows, and system stability.
But their importance is growing faster than their protection.
Europe is accelerating its ambitions, targeting 60 GW of offshore wind capacity by 2030 and 300 GW by 2050, according to the European Commission. At the same time, global demand for subsea power cables is expected to double by 2030, driven by offshore wind and interconnection needs (source: HSBC Global Research, 2023).
Recent incidents in the Baltic Sea have further exposed a key vulnerability: as resilience on subsea infrastructure increases, so does the impact of disruption.
The result is a simple but critical reality: subsea cables are no longer just technical assets, but strategic infrastructure.
Subsea cables: strategic lever for Europe
The role of subsea cables is evolving alongside the broader energy transition.
What was once considered a technical layer is now directly linked to energy security, sovereignty, and investor confidence. As offshore wind expands and interconnections multiply, the tolerance for prolonged outages is shrinking.
This is driving a shift in expectations, from reactive repair models to structured, anticipatory IMR strategies embedded into infrastructure planning.
For Europe, the challenge goes beyond technology. It is about aligning capabilities, coordination, and long-term investment with the scale of ambition.
If subsea cable failures remain relatively rare, when they occur, their consequences are immediate. With limited redundancy in power transmission systems, outages can disrupt electricity flows, impact markets, and delay renewable integration. Repair operations are complex and costly, depending on location and conditions.
At the same time, the ecosystem required to respond such as specialized vessels, skilled personnel, and available equipment remains constrained.
What are the results? A growing imbalance: more infrastructure, higher exposure, and limited ability to recover quickly.
Rethinking resilience: from prevention to readiness
Operators increasingly recognize that failures cannot be entirely avoided, whether due to environmental conditions, human activity, or external threats. The real differentiator is therefore not only prevention, but preparedness.
Inspection, Maintenance and Repair (IMR) play a central role in this shift. By combining proactive monitoring with the ability to intervene rapidly, IMR enables operators to reduce downtime and maintain system continuity.
In this context, resilience becomes operational: assets have to be restored quickly when it matters most.
To meet these new demands, the industry is moving toward more integrated models, linking infrastructure delivery with lifecycle services.
Combining EPCI (Engineering, Procurement, Construction, Installation) capabilities with IMR allows for:
- Greater continuity between installation and operation
- Faster, more efficient interventions
- Improved visibility over asset condition
- Reduced lifecycle risk.
For operators and developers, this approach helps shift IMR from a contingency measure to a built-in component of system design.
