French Armed Forces Strengthen Tactical Interoperability and Connectivity with VT-4 Hydre Vehicle.

The VT-4 Hydre, one of the versions of the French Army’s VT-4 light tactical vehicle, was presented during the French Bastille Day rehearsals. The name, drawn from the mythological creature with multiple heads, reflects the intent to make it a multiplier of forces and networks on the battlefield. The Hydre is not merely a command or liaison vehicle; it is designed as a mobile digital hub, aimed at network hybridization and interoperability between French, allied, and partner forces. Developed to meet the requirements of increasingly connected warfare, it offers the capability to rapidly deploy IT services and secure networks in any operational theater.
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To secure data flows, the Hydre is equipped with Stormshield, a cybersecurity gateway that protects and partitions onboard information systems. (Picture source: Army Recognition)

Designed by Arquus under the supervision of the French Directorate General of Armaments, the VT-4 Hydre embodies this shift toward network-centric warfare. It is gradually replacing the old P4 vehicles, while providing tactical leaders with a mobile, highly connected command post. This transformation is based on the native integration of the Scorpion Combat Information System (SICS), enabling real-time management and dissemination of the tactical situation on the ground. The vehicle is also equipped with new-generation communication systems such as CONTACT, the software-defined radio of the Scorpion program, the SITEL information system, and a DAGR satellite geolocation device. These technologies make the VT4 Hydre a tactical network node, capable of receiving, processing, and redistributing critical operational information.

The equipment installed in the VT-4 Hydre provides significant versatility. It includes the DU PRC Harris, an American long-range radio, as well as the Delta Suit and Attack systems, designed specifically for operations conducted in coordination with special forces. The Hydre is also equipped with CICES, a geolocation system that displays the real-time position of friendly forces on a virtual map. This advanced command post also offers Voice Over IP (VoIP) telephony capabilities, enabled by the integration of four SIM cards, allowing the system to switch between civilian 4G and 5G networks depending on local coverage.

To secure data flows, the Hydre is equipped with Stormshield, a cybersecurity gateway that protects and partitions onboard information systems. Regarding satellite connectivity, the vehicle uses a Kymeta antenna connected to the European OneWeb constellation, comprising between 600 and 700 satellites, offering a European alternative to Starlink. A second antenna, a small white dome located at the rear of the vehicle, is connected via Transatel, ensuring continuity of 4G and 5G cellular networks. A network switch, also installed at the rear, enables wired interconnection between onboard and external equipment.

This network hybridization capability positions the VT4 Hydre as a key tool for the French Army, particularly within the 3rd Signal Regiment, 5th Company, where it is currently deployed. Designed to address interoperability challenges, it enhances collaboration with French forces, joint services, and allies.

In parallel, the standard VT-4 retains its original specifications: a length of 5.30 meters, a width of 2.16 meters, and a height of 2.06 meters, with an empty weight of 2.66 tonnes and a payload capacity of 770 kg. Powered by a 220-horsepower engine, it can reach a maximum speed of 165 km/h with a range of 800 kilometers. The vehicle is designed to carry five soldiers or four combatants equipped with the FELIN system, is compatible with air transport via A400M, and can operate on military fuels or degraded diesel. Additional features include black-out lighting systems, window protection, and dedicated storage for individual weapons such as the FAMAS or HK416F.