Hydrogen-fueled drone submarine with 17 sensors could scan Hormuz for naval mines

Greyshark

Hydrogen-fueled drone submarine with 17 sensors could scan Hormuz for naval mines

The submarine can track underwater activity across large maritime zones.

InterestingEngineering.com | Georgina Jedikovska | May 13, 2026

A European defense technology company has just unveiled the world’s longest-endurance unmanned submarine, which can remain submerged for up to four months without the need for a support vessel.

Built by Bremen-based Euroatlas, Greyshark is an autonomous underwater vehicle (AUV) developed for long-range, underwater surveillance missions. This includes protecting critical subsea infrastructure, such as energy pipelines and communications cables, in contested waters.

The unmanned underwater vehicle (UUV) uses hydrogen fuel cell propulsion. This allows it to run underwater for 16 weeks nonstop. It features 17 high-resolution sensors, capable of generating seabed images with a resolution of 1.6 inches per pixel. These can also detect underwater hazards.

The vehicle can conduct persistent monitoring missions while significantly reducing the need for crewed naval deployments. It can travel up to 1,100 nautical miles at 10 knots, or 10,700 nautical miles at slower speeds of four knots...more
https://interestingengineering.com/military/uncrewed-hydrogen-submarine-patrol-oceans

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Beijing's Hydrogen Energy Program Is 3 Years Ahead of Every Western Nation Combined. While Western nations focus on pilot projects, regulations, and market-led adoption, China is pursuing large-scale deployment first and economic optimization later.