Key Takeaways

  • Around 200 undersea fiber optic cables carry virtually all transatlantic telecommunications and global financial transactions.
  • Chris Sacca, who worked on Google's data center fiber routes, warns that these transoceanic lines remain unfortified against physical cuts or covert state surveillance.
  • Ireland forms a geographic bottleneck where nearly all US-to-Europe cables make landfall, making the Irish coastline a high-priority target for sabotage.
  • Legacy naval vessels cost far too much to patrol thousands of miles of ocean floor 24/7, creating an asymmetric advantage for attackers.
  • Will O'Brien argues that vertically integrated, mass-produced autonomous underwater drones from Ulysses are the only economical way to defend deep-sea infrastructure.

The Fragile Bottleneck Beneath the Atlantic

Modern cloud infrastructure looks virtual until you trace the physical glass on the seabed. Around 200 commercial undersea fiber optic cables carry the world's internet traffic and interbank financial data across oceans. When Chris Sacca worked on Google's data center fiber routes, he saw how exposed those physical lines actually were. A single severance cuts off entire regions unless alternate routes exist. As Sacca noted, “Until we have Starlink and other diverse providers in that space, you literally snip the fiber and it's offline.”

The exposure extends beyond disruption to espionage. Submarines can tap unarmored deep-sea cables directly. “It's not hard for China to go listen to those things and read everything,” Sacca pointed out. “It's actually the least fortified.”

Physical geography compounds this danger. Will O'Brien, founder and CEO of Ulysses, highlighted the waters off Ireland as a prime example of systemic exposure. “All of the cables that run from the US into Europe pretty much cross Ireland,” O'Brien explained. “So that's one area that you might highlight as a choke point.” Hostile actors know these coordinates. A handful of well-placed cuts off the Irish coast could paralyze communication between North America and Europe.

Why Defending the Ocean Floor Requires Autonomous Fleets

Defending thousands of miles of underwater cable with traditional surface navies is mathematically impossible. Crewed patrol ships burn tens of thousands of dollars per day, and human divers cannot operate at the crushing pressures of the deep sea floor. O'Brien framed the economics as an impossible mismatch: “All of these areas should just be persistently monitored 24/7, but it's much too expensive to do that manually.”

When an adversary needs only a cheap submersible or an anchor drag to sever a multi-billion-dollar line, legacy defense fails. O'Brien described the dynamic bluntly: “Totally asymmetric, like Jesus... Like totally.”

The solution requires abandoning custom military hardware built on cost-plus contracts. O'Brien's company, Ulysses, focuses on vertically integrating the manufacturing of small autonomous underwater drones. Operating in deep water means solving severe engineering constraints: extreme hydrostatic pressure, zero GPS reception, and near-zero radio bandwidth through water. Instead of buying million-dollar specialty submarines, Ulysses mass-produces autonomous units at consumer-hardware economics. These submersibles handle dual missions: commercial tasks like surveying offshore wind turbine lines and replanting seagrass beds during peacetime, alongside persistent 24/7 defensive surveillance around maritime bottlenecks.

What to Do With This

Map your company's physical infrastructure dependencies this week. Audit where your primary cloud provider hosts critical databases, identify whether your cross-region backups cross underwater cables, and configure automated failover to satellite or terrestrial networks before a localized cable cut strands your production systems.