Hydrogen as the power for submarines and ships.

Above. The Northrop-Grumman Manta Ray

An autonomous underwater vehicle (AUV) needs. A lot of computer power. Maybe: in the future. There are also nuclear-powered versions of the AI-controlled underwater autonomous vehicles. The large-sized, almost full-sized nuclear-powered submarine drones can provide electricity for their high-capacity computers. Those computers are needed for the independent operations. 

The ship or submarine can use hydrogen as fuel for fuel cells or gas turbines. The submarine drone operates 1,257 miles using the hydrogen fuel cells. That thing can be a very impressive record. But there is a possibility of using hydrogen in the gas turbines. An electric ship. It can also use hydrogen for gas turbines. It creates hydrogen from water by using electrolysis. And those gas turbines can make the system faster. The thing is that. 

The combined nuclear and steam (CONAS) system. That used in aircraft carriers and Russian Kirov-class battlecruisers can also be combined with gas turbines. The nuclear-based. Combined steam and gas COSAG engines can be revolutionary propulsion for submarines. In those systems, the small nuclear reactors can give electricity to electrolytic systems. And then those systems can deliver hydrogen to the gas turbines. 

The supercavitation technology can also make those systems more powerful. The nuclear-powered ships that use portable nuclear reactors can operate at very high speeds for virtually unlimited time. The small nuclear reactors. That can fit into the truck containers can turn any ship in the world . Into nuclear-powered. The nuclear-powered. Systems can give. 

The aircraft carriers' unlimited operational time. And the hydrogen-powered aircraft can operate without limits. But today, those aircraft carriers can be like small underwater drones. That releases drone swarms near the coastline. The carrier drone itself. It can look like a miniature version of the ballistic missile submarine. The quadcopters can be loaded as towers behind the hatches. These are similar to missile tubes in larger submarines. 

The small nuclear reactors can turn “Orca” or “Manta Ray” class underwater drones into tools. That has an unlimited operational range. Systems like the Russian  nuclear-powered “Poseidon” (Status 6) nuclear torpedo drones can reach a speed of 100 knots. That means a combination of nuclear reactors and hydrogen-burning gas turbines can give drones speeds. Those are higher than anytime before. The nuclear-powered drones that are equipped with micro nuclear reactors can revolutionize naval technology. 

https://fortune.com/2026/02/21/us-military-airlift-small-nuclear-reactor-first-time-c-17-microreactors/

https://interestingengineering.com/energy/world-first-submarine-drone-travels-underwater

https://www.navalgazing.net/Modern-Propulsion-Part-3

 https://www.naval-technology.com/projects/kirov/

https://www.northropgrumman.com/what-we-do/mission-solutions/sensors/manta-ray

https://en.wikipedia.org/wiki/Combined_steam_and_gas

https://en.wikipedia.org/wiki/Orca_(AUV)

https://en.wikipedia.org/wiki/Poseidon_(unmanned_underwater_vehicle)