Subsea Cables as Strategic Chokepoints Security, Sovereignty, and the Grey Zone

The panel opens by framing undersea cables as a mostly invisible layer that carries most international data and a large share of economic activity, with a direct role in national security. The speakers look past the cable itself to the landing stations where cables come ashore and to the upstream supply chain for optical fiber and repeaters, which demand from AI data centers is straining.

Using Taiwan as a case study, a war-game analysis describes how a handful of high-capacity cables carry most of the island's traffic, and why cutting cables at sea is less effective than striking the land-based landing stations. Shallow-water damage from anchors and fishing gear is the main near-term tool, while deep-sea robotic operations are described as hard to run autonomously. Repairs can take weeks because few repair ships exist and spare cable has long lead times. The discussion then turns to the US, where landing sites cluster in a few coastal areas, and to Alaska, which depends heavily on subsea links.

The closing discussion covers how cable cuts can serve as coercion or signaling, and how attribution is hard when damage looks accidental. Attacks on data centers are raised as a newer kind of target. The panelists argue that governments need shared norms and deterrence options, and that no single fix exists. Audience questions also touched on smart cables with embedded sensors as a possible detection aid, though the speakers said that work is early.