France is preparing its naval experimentation infrastructure for a new generation of maritime drone swarms, with future trials expected to involve several autonomous platforms operating across different maritime domains. The Direction générale de l’armement (DGA) has established a dedicated naval-drone testing capability designed to move beyond individual platform trials towards more complex multi-drone and multi-environment operations. The initiative reflects a broader shift in naval robotics, where the challenge is increasingly not simply to deploy an unmanned vehicle, but to coordinate fleets of heterogeneous systems under a common mission architecture.
Maritime Drone Swarms Drive a New Coordination Challenge
France’s naval industry identifies coordination, command and control, communications and mission management as central technological challenges as autonomous systems proliferate. The French maritime industries association GICAN describes the next stage of development as the multiplication of platforms capable of operating in swarms and cooperating across heterogeneous environments.
The concept could bring together unmanned aerial vehicles (UAVs), unmanned surface vehicles (USVs) and unmanned underwater vehicles (UUVs), each contributing different sensors or mission capabilities. Autonomy in this context extends beyond navigation: it also includes fleet management, mission allocation, tele-operation and varying degrees of autonomous decision-making.
However, publicly available French sources do not confirm that a fully autonomous, multi-domain maritime swarm has yet been demonstrated. Details of any single coordination software architecture, the number of vehicles that could be controlled simultaneously and the degree of decision-making delegated to the drones have not been disclosed.
Toulon Test Infrastructure Prepares Multi-Drone Operations
The DGA launched its CapXDN naval drone experimentation capability on 12 June 2025. Co-managed by DGA Techniques navales and the French Navy’s Centre d’expérimentation des programmes navals (CEPN), the system uses sites around Saint-Mandrier, near Toulon, as well as Lanvéoc near Brest.
According to the DGA, existing facilities were already able to conduct individual drone trials, but the growing integration of unmanned systems into naval forces required infrastructure capable of supporting more complex multi-drone and multi-environment tests. CapXDN is intended to provide that scaling capacity while giving the DGA and French Navy dedicated areas for sensitive experimentation.
France has since continued operational experimentation around Toulon. In January 2026, the DANAE programme tested autonomous surface drones intended for harbour protection and ship escort missions south of the Saint-Mandrier peninsula. The programme is structured around several experimental phases, illustrating the French Navy’s emphasis on progressively assessing autonomous systems in realistic maritime conditions.
Multi-Domain Operations Move Beyond Individual Naval Drones
The strategic transition is therefore from individual unmanned platforms towards connected systems able to distribute surveillance, reconnaissance and other tasks across several vehicles. Surface drones can provide persistence, aerial systems can extend observation beyond the horizon, while underwater platforms can collect information below the surface.
Coordinating those assets reliably particularly when communications are degraded or contested remains a major technological and operational hurdle. France’s emerging experimentation architecture is designed to address precisely that problem. Rather than confirming that autonomous maritime swarms are already operational, the available evidence shows that the French Navy and defence technology community are building the test environment required to determine how such systems could eventually operate together.
