Who Guards the Wires Beneath the Sea?

A new Capacity Insights report warns that repair gaps, hyperscaler disruption, and geopolitical threats are outpacing global cable governance

11 May 2026

Beneath the world's oceans, the infrastructure carrying nearly all international data traffic is now at the center of a security debate that governments are only beginning to confront. A new sector report from Capacity Insights, drawing on interviews with senior executives across the global subsea cable industry, identifies three converging pressures: demand growth, hyperscaler disruption, and geopolitical risk. Current governance frameworks are structurally ill-equipped to absorb any one of them.

Repair capacity is the most immediate gap. Recording between 150 and 200 cable faults each year, the sector relies on a vessel fleet that FLAG CEO Carl Grivner describes as plainly insufficient, with no realistic short-term resolution on the horizon. Maxie Reynolds, founder of Subsea Cloud, sharpens the risk further: most networks can survive a single cable cut, but multiple correlated failures in high-traffic corridors would expose a response infrastructure that has never been tested at that scale.

Coordination remains the unsolved problem at the center of every challenge the report surfaces.

Geopolitical pressure is adding urgency to what was once treated as routine operational risk. After a Chinese-flagged vessel severed Baltic Sea cables in 2024, governments intensified scrutiny of cable routes and landing stations, while security planners pushed for monitoring frameworks capable of responding to deliberate interference. AzerTelecom CEO Ana Nakashidze is equally direct on the commercial dimension, warning that traditional operators face a shrinking role as hyperscalers seize control of demand planning, maintenance priorities, and infrastructure architecture.

Distributed acoustic sensing offers a concrete step forward, transforming existing fiber into real-time environmental monitors that give operators and governments sharper visibility along routes where threats are forming.

Produced with candor rarely seen in sector-level reporting, the Capacity Insights findings draw a clear line: technical advances alone will not close the resilience gap. Building shared coordination platforms across governments, operators, and regulatory jurisdictions is the most urgent investment the global subsea cable industry has yet to make, and the one on which all other progress depends.