Underwater data centres gain traction as the AI industry looks to the ocean

[Rogue Di]

Law News has a piece on the growing interest in putting data centres under the sea, as the AI industry runs short of land, power and water on shore. The idea is not new, but the scale of AI demand is pushing it from experiment towards real deployment. With data centre power use expected to keep rising sharply, companies are looking at every option. The ocean offers cooling and space, at least in theory

The best known early test was Microsoft's Project Natick, which sank a sealed data centre off Orkney in 2018. When it was brought back up in 2020, the servers had a lower failure rate than a comparable one on land, which the team put down to the stable temperature and the lack of oxygen and people in the sealed unit. Microsoft did not roll it out commercially, but it proved the concept worked

China has gone further, with a commercial underwater data centre off Hainan and projects linked to offshore wind power. Using seawater for cooling cuts the energy and fresh water needed compared with traditional data centres. Placing them close to coastal cities also means lower latency for large populations

There are plenty of concerns though. Warm water released from the units could affect local marine life, and nobody fully knows the long term impact of large clusters on the seabed. Maintenance is also much harder, since you cannot just walk in and swap a failed drive. And as the Law News angle suggests, there are open legal questions about permits, ownership of the seabed, environmental liability and which country's rules apply offshore

I find the idea fascinating but slightly unsettling. We have spent decades worrying about what we dump in the sea, and now we might fill it with servers. Would you support underwater data centres if they reduced pressure on land, power and water supplies? Or is this a problem we should not solve by moving it out of sight?

Underwater Data Centres Gain Traction as AI Industry Eyes the Ocean - Law Newswww.lawnews.co.uk

[RicFlair_X]

Security is interesting too. Physical attacks are harder underwater, but undersea cables have become targets lately, and putting data centres there makes the seabed even more strategic

[BigDog]

Makes a lot of sense for island nations and coastal cities. Land is expensive and cooling is free

Offshore wind nearby could supply the power directly. It ties together neatly if it works

[Darren]

Maintenance must be a nightmare. Every repair means a ship, divers or a crane. The economics only work if failure rates stay very low, which Natick suggested they might. Still, I would want to see years of real operating data before betting billions on it

Insurance will be interesting too. Who covers a data centre on the seabed?

[Oscar_38]

Natick's lower failure rate was the surprising result. Sealed, cool and no humans bumping into things turns out to suit servers well. The downside is when something does fail, you cannot fix it until you haul the whole thing up

[OmegaEvan51]

Water use is the strongest argument in favour. Land based data centres are draining fresh water supplies in some areas during droughts. Using seawater instead avoids that completely. That alone could make it worthwhile in dry regions

It just shifts the impact to the sea instead. There is no free lunch

[SilverCurrent]

Warm water discharge is not trivial at scale. One small pod is nothing, but hundreds of them in a bay could change local temperatures

Marine ecosystems are sensitive to that. Proper environmental studies need to come first

[IonStorm99]

China already having a commercial one running says a lot. They move quickly on infrastructure while the West is still running studies. Whether that is a good thing depends on how careful they have been. We might learn from their mistakes or their successes

[Arty Kayla]

The legal side is a minefield. Territorial waters, exclusive economic zones, fishing rights and cable routes all overlap. Who investigates if something leaks or catches fire? International law was not written with this in mind. Lawyers will be busy for years

[LunarDrift Aoife]

Out of sight, out of mind is the worry. It is easier to ignore the environmental cost of something you cannot see. At least a data centre on land has neighbours who can complain