Defence and intervention frigate

	Amiral Ronarc'h, the first Frégate de défense et d'intervention, fitting out at Lorient shipyard December 2022
Class overview
Name	Frégate de défense et d'intervention (FDI)
Builders	Naval Group, Lorient
Operators	Future operators French Navy Hellenic Navy
Preceded by	La Fayette class
Subclasses	Kimon class
Cost	€2.1 billion (2017) for five units (R&D=€1.4bn, Total program cost for France=€3.5bn); €420 million (2017) per unit;
Built	2019+
In commission	2024+
Planned	5 for the French Navy, 3+1 for the Hellenic Navy. (8+1 Total)
Building	5
General characteristics
Type	General purpose frigate or destroyer
Displacement	4.460 t (4.390 long tons)
Length	122 m (400 ft 3 in)
Beam	17.7 m (58 ft 1 in)
Propulsion	Combined diesel and diesel (CODAD) arrangement ; Total output: 32,000 kW (43,000 shp);
Speed	Maximum: 27 knots (50 km/h; 31 mph)
Range	5,000 nmi (9,300 km; 5,800 mi) at 15 knots (28 km/h; 17 mph)
Endurance	45 days
Complement	110, excluding air crew detachment of approx. 15
Sensors and ; processing systems	Search & track radar: Thales Sea Fire multi-function Active electronically scanned array radar, S-band; Sonar: Kingklip Mark 1115 hull sonar,; CAPTAS-4 towed sonar; Decoys: SYLENA Mk1 decoy launching systems for CANTO anti-torpedo decoys (Greek vessels);
Armament	Guns: Oto Melara 76 mm Super Rapid gun (mounted in stealth cupola), 2 × Nexter Narwhal 20 mm RWS (French vessels), Leonardo LIONFISH 20mm (Greek vessels); Anti-ship missiles: 8 × Exocet MM-40 Block 3c ; Anti-air missiles: 2 × Sylver A50 8-cell VLS for 16 MBDA Aster 15/30 surface-to-air missiles (French vessels); 4 × Sylver A50 8-cell VLS for 32 MBDA Aster 15/30 (Greek vessels); 1 × Mk31 21-cell launcher of RAM Block 2B surface-to-air missiles (Greek vessels); Anti-submarine: 2 × dual torpedo tubes with EuroTorp MU90 Impact torpedoes;
Aircraft carried	1 NH90 or Guépard Marine (H160M) helicopter equipped with torpedoes, air-to-surface missiles, and/or heavy machine gun; and SDAM UAV (French vessels); 1 MH-60R Seahawk plus Schiebel Camcopter S-100 in Greek Service.

The defence and intervention frigate (French: Frégate de Défense et d'Intervention) or FDI, also known as the Frégate de Taille Intermédiaire (English: Medium-Size Frigate) or FTI, is a class of French frigates. As of February 2022, five ships have been ordered for the French Navy, with the lead ship being named Amiral Ronarc'h, and an additional three, more heavily armed vessels, for the Hellenic Navy, with the lead ship named Kimon.

First steel was cut in October 2019, beginning construction on the lead unit. The lead ship was laid down on 17 December 2021. Commissioning is planned from 2024 onwards.

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