Frigate Amiral Ronarc'h begins propulsion tests in Lorient after exiting dry dock.

According to information published by Mer et Marine on September 3, 2024, the first FDI frigate, Amiral Ronarc'h, has successfully left the dry dock and commenced propulsion trials.
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First French Defence and Intervention Frigate (FDI) frigate Amiral Ronarc'h. (Picture source: Naval Group)

The Frégate de Défense et d'Intervention (FDI), also known as the Defence and Intervention Frigate, is a new class of frigates developed by the French shipbuilder Naval Group for the French Navy and the Hellenic Navy. The FDI is designed to be a versatile and capable vessel, featuring advanced technologies and systems to perform various roles in naval warfare, including anti-ship, anti-air, anti-submarine, and electronic warfare.

The FDI frigates are notable for their advanced digital and cyber capabilities. They are the first French frigates to feature native protection against cyber threats, incorporating two data centers that virtually operate the ship’s systems.

The ships are equipped with the SEA FIRE all-digital multi-function radar, which provides capabilities ranging from self-defense to extended air defense.

Additionally, they come with a compact version of the CAPTAS-4 towed-array sonar, capable of ultra-long-range detection with reduced weight and size. Other advanced systems include the Aquilon integrated digital communications system, an Identification Friend or Foe (IFF) system, and the SENTINEL electronic warfare suite​.

The FDI class is set to have a displacement of around 4,500 tons, a length of approximately 122 meters, and a width of 18 meters. The frigates can reach a maximum speed of 27 knots. They are armed with a variety of weaponry, including MBDA Exocet MM40 Block 3C anti-ship missiles, Aster 15 and 30 air defense missiles, RAM missiles, MU90 torpedoes, and a 76mm naval gun. These ships also have facilities for operating a 10-ton class helicopter and unmanned aerial vehicles (UAVs).

France plans to commission five FDI frigates between 2024 and 2030, with the first ship, named "Amiral Ronarc'h," scheduled for delivery in 2024. Greece has also ordered three frigates, known locally as the Belharra-class or FDI HN, with a fourth as an option.