European Subsea Companies Securing Undersea Infrastructure

This report assesses the capacity of European and allied industrial actors to secure critical undersea infrastructure through autonomous monitoring and deep-water inspection technologies.

The protection of critical undersea infrastructure, including data cables and energy pipelines, represents an urgent capability requirement for the security of the European Union. This report evaluates the industrial posture of European and associated allied actors capable of providing independent technical solutions to secure the maritime “fifth domain.” Following a fact-first assessment, the analysis examines how the development of autonomous maritime systems and advanced sensing technologies facilitates regional strategic autonomy. The database mapping indicates that achieving technical non-dependence is contingent upon the remediation of single points of failure within the underwater value chain. By focusing on localized manufacturing and sovereign intellectual property, the EU aims to mitigate existing access and tasking constraints. This evaluation covers industrial actors relevant to strategic security, separating EU sovereignty objectives from broader NATO frameworks to clarify the strategic alignment of each profiled entity. The maturation of these technologies is intended to provide a redundant layer of security for vital institutional infrastructure and connectivity nodes.