AWS Fastnet Cable Cements Ireland as AI Hub, Bares Naval Gap

Amazon Web Services is running its own transatlantic subsea cable straight into County Cork, and the way Bloomberg frames it is worth sitting with. Fastnet is a 320+ Tbps cable linking Maryland to County Cork, engineered as the first private subsea cable AWS owns outright, with the Cork landing station approved on April 20, 2026 and a 2028 ready-for-service target. Construction on the landing station is expected to begin in late 2026 and finish in 2027.

The pitch is that Fastnet plugs Ireland directly into the transatlantic AI data path. AWS says the new pipe delivers capacity equivalent to streaming 12.5 million high-definition films simultaneously, and it slots into a global network already spanning 38 geographic regions. For AWS Europe customers running training and inference workloads that increasingly cross the Atlantic, a private lane on a route different from the consortium cables everyone else shares is a real operational win.

The other half of the reporting is less flattering. Bloomberg pairs the AI-hub story with Ireland's chronic underinvestment in the naval capacity needed to police the waters those cables pass through. According to widely cited analysis, Ireland spends about 0.2 percent of GDP on defence and its active naval fleet was down to two operational ships in 2023, even as roughly three-quarters of Northern Hemisphere subsea traffic passes through or near Irish waters. The November 2024 escort of the Russian ship Yantar out of the Irish Sea is the recurring case in point.

AWS is doing some of the hardening itself, burying the fibre approximately 1.5 metres under the seabed and adding extra armour plating near shore areas to guard against accidental damage or potential sabotage. That helps at the cable level. What the reporting does not give you is any concrete commitment from Dublin about whether the promised maritime security strategy will be resourced in a matching way, or how one privately owned cable actually changes the political calculus for a state that has historically outsourced this problem.

The forward-looking read is that Ireland's status as Europe's AI gateway has become a two-track story: infrastructure keeps arriving, and the defensive footprint keeps not catching up. Fastnet lands in 2028. The interesting question is what the Irish state chooses to do with the roughly two years between now and then.