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Index/Conceptupdated Sat Jul 04 2026 08:00:00 GMT+0800 (Philippine Standard Time)

Subsea Cables

infrastructureaigeopoliticshyperscalersconnectivity

Subsea Cables

The arterial layer of the global internet and — increasingly — of the AI Capex Supercycle. ~700 subsea cables carry 99% of intercontinental internet traffic. The vault's data-centre and chip-hoarding threads implicitly assumed the interconnect was solved; this page tracks it as its own contested surface.

Two structural shifts (Economist 2026-07-04)

  1. Who pays. The historic consortium model — many national telecoms firms co-financing — has given way to hyperscaler solo-ownership. Reference points:
    • 1999 SEA-ME-WE 3 (Europe → Asia): 92 consortium partners, $1.3bn, slow to plan/build, routed near coastal customer bases.
    • Google: 34+ cables funded since 2008; 18 owned without partners.
    • Meta: $10bn Project Waterworth, a global cable network still in development.
    • Capex forecast: ~$4bn/year in new subsea cable investment over the next four years, "the bulk of it by so-called hyperscalers seeking to win the AI race."
  2. Where they lay them. Unshackled from the need to hug population centres, cables now cross the open ocean to connect data centres to data centres — not people to people. Routes are drawn specifically to avoid:
    • China-controlled seabed — repairs within China's "nine-dash line" (~1,000+ km from coast) require Beijing approval, though international law only reserves interference within territorial seas.
    • Chokepoint littoral states — Indonesia, Malaysia, the Strait of Malacca — where "constantly shifting rules" (local-shipping mandates, permit games) extract value and delay repairs. Indonesia's cash-strapped president and finance minister have mused about monetising the chokepoint position more aggressively.

The new Asia-Australia-America spine

  • First cable on the new route: 2022, Oman → Australia, with spurs to Diego Garcia (US-UK base) and Cocos Islands (Australian territory).
  • Christmas Island as a Google hub: Oman → Maldives → Christmas Island → Australia.
  • Meta's Project Waterworth — looks set to follow a similar Indian Ocean course.
  • Pacific: Guam increasingly the hub for cables connecting American allies in Asia.
  • US–China: No new cables have been approved since Barack Obama was in office.

Failure modes and adversarial signals

  • Baltic Sea and Taiwan cable cuts in recent years cited by Australian defence minister Richard Marles at the May 2026 Singapore meeting of 17 nations. No conclusive sabotage evidence has been shared — the fears are precautionary but the routing shifts are real.
  • Private operators are hedging. Not waiting for governments to secure cables — they're routing around contested waters directly.

Satellite substitution ceiling

Satellite internet (Starlink, OneWeb, Amazon Leo) has a role — see Africans Are Turning to Starlink (Economist) — but per-gigabyte cost is orders of magnitude more expensive than pushing light down a cable, and will be for "many years yet." So subsea cables carry the intercontinental bulk (~99%) and satellite handles last-hop / underserved / emergency.

Why it matters for this vault

  • Material infrastructure mirror of the Hierarchy of Access. The Indian Ocean spine + US-China cable freeze + Guam ally hub is a subsea-cable map that traces the AI-sovereignty axis directly.
  • Hyperscalers as sovereign infrastructure actors. Google / Meta / Microsoft making solo cable-routing decisions is private firms doing foreign policy. This is analogous to how Starlink and SpaceX make sovereign-scale connectivity decisions in Africans Are Turning to Starlink (Economist).
  • Interconnect is a category the AI Capex Supercycle page didn't previously track. The $4bn/yr cable spend fits inside the $3trn 2026-2030 buildout as its arterial layer.
  • Southeast Asia detour cost. Countries that expected to monetise their chokepoint position — Indonesia especially — face a real revenue and strategic loss. Consistent with Prabowo Subianto's resource-nationalism arc; the piece is a specific instance of the compact fraying.

Cross-references