The Amiral Ronarc’h put to the test at sea

Lengthy deployment tests the vessel in the real world – several months at sea, in varied and sometimes extreme conditions – in order to validate what no test bench or one-off test at sea can reproduce: the endurance of the systems, the reliability of the equipment, the performance of the weapon systems, the cohesion of the crew, the capability to decide and operate far and wide over time, all while conducting first-level maintenance. In short, it marks the transition from the shipyard to the ocean, from a static system to an operational entity, providing valuable feedback and enabling the next frigates in the series to be refined and made more reliable.

From the far north to the Caribbean

The journey took place in two main sequences, at both ends of the climate spectrum. First in the Far North and the North Atlantic, where temperatures approach 0°C and frost threatens circuits, anti-icing systems and everything exposed to cold. Then in the South Atlantic and the Gulf of Mexico, where temperatures rise to 36 or 37°C, putting pressure on the ship’s cooling capacities, as well as on its computer systems and onboard data centres.
Before reaching the Mediterranean, the Amiral Ronarc’h will have experienced environments that few ships face in the same deployment. This is no coincidence: the FDI was designed to operate on all the seas of the globe, reflecting the extent of the French maritime domain, second in the world covering almost 11 million km². 
 

Operating together, and fast

Lengthy deployment also tests the ship’s ability to integrate joint operations. Off the coast of Brest, the Orion exercise demonstrated its added value within a coalition, alongside the Charles de Gaulle aircraft carrier and multimission frigates (FREMM), with the FDI being able to exchange tactical data in real time and establish a complete situation in the three dimensions of combat (air, surface and submarine). Replenishment manoeuvres with the new replenishment vessels (BRF) were carried out, including a loading operation of missiles at sea, validating the support that these vessels are capable of providing to the FDI.

Unprecedented proximity, increased confidence

Behind the operational performance, Naval Group teams were mobilised to support the ship and its crew throughout the deployment. A pair of engineers (a warranty engineer and a product engineer) operated from the ship’s base port (Brest) as a veritable control tower: centralising technical information, coordinating expertise, organising flows of spare parts, providing rapid responses to hazards and helping the crew get to grips with the ship.
In terms of support, multi-site teams were mobilised, such as from the Naval Group site of Nantes-Indret for propulsion, Ollioules for the combat system and Lorient for the platform, for example. The continuous presence of Naval Group teams on board illustrated an unprecedented level of proximity with the crew and helped to strengthen their relationship, based on partnership and trust.

A combat-ready ship

As first of class, the Amiral Ronarc’h is leading the way. “Each lesson learned from its lengthy deployment will refine the operational readiness of the four FDIs that will succeed it,” concludes Thibaut Bourjaillat, FDI France Through-Life Support (TLS) Program Director and Chief Service Officer (CSO) of the FDI product.
A first major technical stop is planned in Brest between September and December 2026, marking the end of the warranty period and paving the way for admission into active service. This will be the final step before the Amiral Ronarc’h enters its operational cycle, fully armed and ready to provide the French Navy with the capabilities it needs to deliver power at sea.