High-performance computing is moving into international waters to solve the dual challenges of energy availability and hardware cooling. US-based tech startup Panthalassa recently finalized a $140 million Series B investment round to scale production on its self-propelled maritime data platforms. 

“There are three sources of energy on the planet with tens of terawatts of new capacity potential: solar, nuclear, and the open ocean,” said Garth Sheldon-Coulson, Co-Founder and CEO of Panthalassa.

This capital injection will fund the completion of an assembly facility near Portland, Oregon, and accelerate a pilot deployment in the northern Pacific Ocean later this year.

“As demand for new electricity and computing continues to surge, terrestrial data centers face mounting constraints: limited grid capacity, cooling water scarcity, supply chain bottlenecks, permitting delays, and impacts on local communities and infrastructure,” said the company in a press release.

Deploying autonomous nodes into deep water

Residential communities frequently organize against new data center construction out of concern over increased utility costs, noise pollution, and the diversion of public resources.

Panthalassa evades these regional regulatory and environmental obstacles by deploying autonomous computing nodes directly into deep water. 

“Panthalassa’s nodes are autonomous, floating energy systems that are mass-produced from plate steel in coastal factories,” added the press release. “They operate in the distant ocean, where they generate clean electricity around the clock.”

Onboard mechanical systems convert the kinetic movement of waves into a steady supply of electricity, establishing a continuous power source that functions independently of weather-dependent terrestrial renewables like solar or wind.

Onboard data processing and ocean cooling

The entire data processing cycle occurs directly on the water. Instead of using undersea cables to send raw electricity back to coastlines, the platforms consume the power immediately to run onboard artificial intelligence hardware. 

The surrounding ocean operates as a perpetual thermal sink, providing natural cooling that maintains optimal chip temperatures and slows hardware degradation without consuming municipal freshwater. 

For data transmission, the system relies on low-Earth-orbit satellite networks to receive incoming commands and broadcast completed AI inference tokens back to terrestrial clients.

“Rather than transmitting energy back to terrestrial grids, Panthalassa uses it directly onboard to power AI chips, sending inference tokens to land by satellite,” explained the company.

Development timeline and future outlook

The upcoming deployment of the Ocean-3 pilot series represents the culmination of a ten-year development timeline. Panthalassa previously conducted oceanic field tests using its Ocean-1, Ocean-2, and Wavehopper designs in 2021 and 2024 to verify the stability of its power generation and navigational software. 

The scheduled Pacific trials will focus on processing active computing workloads and standardizing manufacturing protocols in preparation for widespread commercial availability in 2027.

By utilizing remote marine environments, the architecture opens up a vast energy resource without adding traffic to domestic power infrastructures or requiring new land-based power plants. 

Financial backers and corporate partners indicate that moving high-density computing to the ocean offers a viable template for scaling global technology infrastructure while mitigating the economic and ecological impact on civilian communities.

“We’ve built a technology platform that operates in the planet’s most energy-dense wave regions, far from shore, and turns that resource into reliable clean power,” concluded Sheldon-Coulson. “We’re now ready to build factories, deploy fleets, and provide a sustainable new source of energy for humanity.”

Terrestrial Energy has secured exclusive access to 77 acres at the Texas A&M-RELLIS campus to advance engineering preparations for a small modular nuclear power plant. The signed ground lease and research and development agreements allow the company to conduct physical testing and environmental site characterization. 

This data collection is required before submitting a construction permit application to the US Nuclear Regulatory Commission.

This development follows two regulatory and technical milestones achieved by Terrestrial Energy earlier this year. In April 2026, the Nuclear Regulatory Commission completed a safety evaluation of the company’s methodology for identifying and analyzing potential reactor accidents. 

This assessment is built on a late 2025 regulatory milestone, during which the agency approved the core engineering design criteria for the system. In May 2026, the company entered a separate agreement with Riot Platforms to study how this reactor design can support large-scale computing infrastructure, targeting up to 4 gigawatts of total power capacity.

Technical profile of the molten salt design

The planned facility uses an Integral Molten Salt Reactor, which represents a shift from traditional light-water nuclear plants. Traditional reactors use solid uranium fuel rods cooled by water under high pressure. In contrast, this Generation IV design mixes low-enriched uranium fuel directly into a liquid salt mixture. The liquid functions simultaneously as the fuel matrix and the heat transfer fluid.

This liquid state alters the safety profile of the system. If power is lost, the liquid salt can cool by natural air circulation without requiring active electrical backup pumps to prevent overheating. The reactor operates at high temperatures but at normal atmospheric pressure. This low-pressure environment reduces the physical risk of a containment breach compared to high-pressure water systems.

The reactor is engineered as a small modular unit. This allows major components to be fabricated in a factory environment and transported by truck or rail to the site for assembly, rather than being built entirely on-site. The facility is designed to generate both electricity and high-temperature industrial heat. This thermal energy output can be directed to industrial applications, such as chemical synthesis, or to localized power grids.

Scope of the campus testing site

The 77-acre site at the RELLIS Energy Proving Ground will host multiple validation projects. Terrestrial Energy has established an engineering and project management office on the campus to oversee these activities. Under a master research agreement finalized in the first quarter of 2026, university researchers and company engineers will collaborate on testing procedures.

The site will support the primary reactor project, alongside two initiatives managed in partnership with the US Department of Energy, TETRA and TEFLA. Engineers will focus on verifying how the system’s materials withstand high thermal stress and radiation over time. The project also includes local workforce development to train technicians on the specific maintenance protocols required for liquid-fueled systems.

The regional power grid, operated by the Electric Reliability Council of Texas, faces rising demand from advanced manufacturing facilities, industrial operations, and data centers. These installations require a continuous baseline power supply that is not affected by weather conditions.