Defence and intervention frigate

	Amiral Ronarc'h in dock at Lorient
Class overview
Name	Frégate de Défense et d'Intervention (FDI)
Builders	Naval Group
Operators	French Navy; Hellenic Navy;
Preceded by	Aquitaine class; La Fayette class;
Subclasses	Kimon class
Cost	€2.1 billion (2017) (equivalent to €2.3 billion in 2022) for 5 units; €3.5 billion (2017) (equivalent to €3.9 billion in 2022) including development costs;
Built	2019–present
In service	From 2025
In commission	From 2026 (expected)
Planned	5 for the French Navy; 4 for the Hellenic Navy;
Building	6
Completed	2
General characteristics
Type	General-purpose frigate / 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	125 (+ 28 passengers)
Sensors &; processing systems	Naval Group Setis® 3.0 Combat Management System; Thales SEA FIRE 4D AESA S-band multi-function radar; Thales KingKlip Mk2 hull-mounted sonar; Thales CAPTAS-4 Compact towed array sonar; Thales Aquilon digital communication system; Thales SURFSAT-L SATCOM terminal with Syracuse IV satellite link; Terma SCANTER X-band navigation radar; Wärtsilä NACOS X-band navigation radar; iXblue Marins inertial navigation system; iXblue Netans navigation data distribution system; Thales STIR 1.2 EO Mk2 medium- and long-range tracking radar system for gunfire control; Safran PASEO XLR extra long-range EO/IR and FCS system; Bertin Technologies 360° TV/IR camera surveillance system; Thales BlueGate E-scan IFF system;
Electronic warfare; & decoys	Thales SENTINEL R-ESM system; Thales ALTESSE-H C-ESM system; Naval Group CMLS with CANTO anti-torpedo decoys;
Armament	1 × Oto Melara 76 mm Super Rapid gun (in stealth cupola); 2 × Nexter Narwhal 20B 20 mm RWS; 8 × Exocet MM-40 Block 3c anti-ship missiles; 2 × Sylver A50 8-cell VLS for 16 Aster 15 or 30 surface-to-air missiles (first three French FDIs from build); 4 x 8 (32 Aster 15/30) on last two French FDIs from service entry and retrofit to other vessels of the class in the 2030s; 2 × 2 Sadral Mistral Simbad-RC point-defence SAM (either fit from build or retrofit); 2 × twin torpedo tubes for MU90 Impact torpedoes;
Aircraft carried	1 NH90 or H160M Guépard helicopter; 1 Unmanned Air Systems: Camcopter S-100 or SDAM;

The Frégate de Défense et d'Intervention (English: Defence and Intervention Frigate) or FDI, formerly denominated Frégate de Taille Intermédiaire (English: Medium-Size Frigate) or FTI, is a programme launched in 2015 to produce a new class of first-rank French frigates to complement the Aquitaine class. As of February 2022, five ships have been ordered for the French Navy and will form the Amiral Ronarc'h class, with the lead ship expected to be commissioned in 2026. In 2021, three units were ordered by Greece for the Hellenic Navy and will form the Kimon class.

Amiral Ronarc'h, the lead ship of the class, was laid down on 17 December 2021. Commissioning of the warship had been planned from 2024 onwards but it was reported that delays in the fitting out and sea trials would push that date, as well as its entry into full service, into 2026.