France UCUV large unmanned combat underwater vehicle demonstrator Naval Group 2028 sea trials, Digi Mart USA News (France): France’s Defense Innovation Agency and Naval Group signed an agreement on November 4, 2026, to build the operational demonstrator of the UCUV, a large unmanned combat underwater vehicle. The announcement was made during the Euronaval 2026 trade show, held from November 3 to 6, which focused on high-intensity operations.
The vehicle must be air-transportable and deployable from a quay or a surface ship. It is intended to perform missions ranging from intelligence gathering to neutralization actions.
Sea trials are scheduled to begin in 2028.
The launch follows early stages of a program started in 2023 with the Direction générale de l’armement (DGA) and draws on sea trials conducted with Naval Group’s industrial demonstrator. The demonstrator must prove endurance, decision-making autonomy, and air transportability, and must be deployable from a quay or a surface vessel.
The agency says the vehicle must combine intelligence, surveillance and reconnaissance missions with offensive neutralization actions. Those roles are usually separated across navies, and the agency has not said whether the design will use a modular architecture or a compromise.
Air transportability is a demanding requirement, since large underwater drones typically weigh tens of tonnes and measure tens of meters. It would allow deployment to distant theaters within days, without a ship to carry the vehicle.
The demonstrator will include a system of controlled decision-making autonomy to adapt to tactical events, the environment and possible failures, alone or in collaboration with other systems. Because high-speed data links do not work continuously underwater, autonomy is a physical necessity rather than only a doctrinal choice.
The agency places the launch in continuity with nearly three years of work among DGA centers, the French Navy and Naval Group under an industrial ocean-drone demonstrator. That program allowed rapid-cycle evaluation of the necessary technologies.
France joins, according to the agency, a very small group of states developing extra-large underwater drone capability, known as XL-UUV. The agency cites growing contestation of underwater space and threats to critical infrastructure as justification.
The agency also cites companies across seven French departments, including Var, Morbihan, Manche, Loire-Atlantique, Yvelines, Bouches-du-Rhône and Seine-et-Marne, indicating that the program relies on dispersed small and mid-sized firms.
No specifications have been published, including length, displacement, endurance or diving depth. The weapons payload is not described, and the amount of the agreement and the number of units beyond the demonstrator were not disclosed.
The agency has not said what will follow if the 2028 trials are successful; a demonstrator is not a program, and moving from one to the other remains a political and budgetary decision.
