FMM multipurpose frigate

The X650 Aventurier as it was commissioned in 1996
Class overview
Builders:	Arsenal de Neons Arsenal de Vaudouan Chantiers Navals Courtillers Fincantieri
Operators:	Sieuxerr Sylva
Preceded by:	T 47-class (Sieuxerr) Vercingétorix-class (Sieuxerr) Charlemagne-class (Sieuxerr) Tourville-class (Sieuxerr) Durand de la Penne-class (Sylva) Audace-class (Sylva) Maestrale-class (Sylva) Lupo-class (Sylva) Other ships used by other nations
Subclasses:	ASW, GP, various national subclasses
Cost:	450,000,000
Built:	1993–present
In commission:	1996–present
Planned:	24 (Sieuxerr) 10 (Sylva) 8 (Maracaibo) 6 (Khalistan) 4 (Batavaie) 68+ (Total)
Completed:	52
General characteristics
Type:	Frigate
Displacement:	5,200 tonnes
Length:	155.1 m (509 ft) LOA 144.4 m (474 ft) LPP
Beam:	16.4 m (54 ft)
Draft:	5.4 m (18 ft)
Propulsion:	50,000 kW
Speed:	31 knots
Range:	5,000 nm @ 19 knots
Complement:	230
Sensors and processing systems:	Optronics: 1 × Sagem Vampir MB infra-red search and track system Radars: 1 × DRBV 15C search radar (Batch I & II) 1 × Kronos Grand Naval (Batch III) 1 × DRBV-26C wide air search radar (Early) 1 × DRBV-27L wide air search radar (Late) 1 × DRBC 33F Castor IIJ fire control radar (Early) 1 × RTN-25X fire control radar (Late) 2 × Navigation and helicopter radars Sonars: 1 × DUBV-24C hull sonar 1 × UMS 4249 CAPTAS4 towed sonar Communications: Satellite links: Inmarsat, SYRACUSE
Electronic warfare & decoys:	Jammers: 2 × ARBB-33 jammers 2 × BSM jammers Noisemakers: 1 × BAR-25A noisemaker Decoy Launchers 2 × ODLS-H launchers 2 × DAGAIE launchers (Batch I & II) 2 × SLAT anti torpedo systems (Batch III & Late)
Armament:	Guns: 1 × Canon de 100 mm Modèle 1968 CADAM (Early) 1 × Canon de 100 mm Modèle 100 TR (Late) 2 × Canon Automatique de 30 mm Modèle 1974 (Batch I & II) 4 × AA-MAS M.82 13.2mm machine guns Missiles: 4 × 8 cell SYLVER A-50 VLS (Batch I) 32 mix of: Aster-15 Aster-30 MASM-LV 2 × 8 cell SYLVER A-70 VLS (Batch II-III) 16 mix of: SCALP EG MM.90 2 × 8 cell SYLVER A-50 VLS (Batch II-III) 16 mix of: Aster-15 Aster-30 MASM-LV 2 × 8 cell SYLVER A-43 VLS (Batch I-III) 16 of: Aster-15 2 × 4 Exocet OR MM.90 launchers 2 × Mistral launchers mounted on ODLS-H (Batch I) 1 × Goalkeeper launchers (Late) 2 × Goalkeeper launchers (Batch III) Torpedoes: 2 × 2-tube 533mm torpedo launcher for MU90 or L5/L17 (10 torpedoes)
Aircraft carried:	2 × AS.332

The FMM ("Frigate Multi-Mission"; Merovingian: Frégate Multi-Mission; Sylvan: Fregata multi-missione) is a class of multi-mission frigates designed in the late-1980s and built throughout the 1990s and into the 2000s. The ships were designed to give EC states a common platform to replace "medium range" air-defense warships like the Durand de la Penne-class used by the Sylvan Navy and the Vercingétorix-class used by the Sieuxerrian Navy and also primarily ASW warships like the Maestrale-class and Charlemagne-class.

The FMM would spearhead a number of new sensors and weapon systems while also retaining legacy systems to help reduce costs and increase interoperability between allied nations. In the Sieuxerrian Navy it is known as the Aventurier-class and in the Sylvan Navy as the Francisco Navarro-class.

Design

Armament

Guns

Sieuxerrian ships were initally constructed with the Model 1968 CADAM 100 mm naval gun, cued by the DRBC 33F Castor IIJ fire control radar, the gun fires a 13.5 kg shell at a rate of 78 rounds per minute. The 100 mm gun has an effective range of 12km with a max range of 18 kilometers. New guided ammunition design for ship self-defense can achieve a range of upwards of 25 kilometers, and specially designed shells for long-range artillery bombardment can reach a range of 50 kilometers. Starting with newer ships, the older Model 1968 gun was replaced in favor of a Model 100 TR, which gave the gun a radar signature reducing casing, removing manual controls in the mount itself, and also improving the rate of fire from 78 to 90 rounds per minute. Batch II ships were armed with the Model 1974 127mm naval gun.

Sylvan warships were given a 75mm naval gun with Tyrannian ships getting a 113mm naval gun. Other ships built for other clients receive a mixture of 75mm or 100mm naval guns.

Small boat defense is done by two Canon Automatique de 30 mm Modèle 1974 30mm autocannons and four AA-MAS M.82 13.2mm machine guns on Sieuxerrian ships. Other nations use a mixture of 13.2mm and 12.7mm machine guns and 20mm or 30mm autocannons of various models. On the Batch III ships, the 30mm guns were removed as the need for small-boat defense was seen as less important in the early 2000s following the Ummayan Civil War.

Missiles

The ships were built to utilize the new SYLVER vertical launch system, and were equipped with space for 6 8-cell blocks on the bow and 2 8-cell blocks between the hangers on the aft of the ship. The two aft blocks on all ships are A-43, which fires the Aster-15 missile with a range of 30 kilometers. These provide basic self and local area defense. Bow VLS cells were originally just A-50, firing both Aster-15 and Aster-30 along with the MASM-LV missile for anti-submarine duties. In production, Sieuxerrian ships did no reciever the full 6 blocks, only getting 4 of them. Batch II ships were built with a focus on ground strike, and had two of the A-50 blocks changed out for two A-70 blocks, able to fire SCALP EG and MM.90 missiles for anti-surface and anti-ship missions. Later Block III ships would have the same VLS arrangement.

On Batch I ships, self-defense was done by launchers firing the Mistral missile, these launchers were mounted onto the ODLS-H decoy dischargers. Experiences against Menghean KSR-5 and P-270 Moskit anti-shipping missiles in the Ummayan Civil War showed that the Mistral missile, a MANPAD, was ineffective at stopping said missiles. Batch II ships did not receive the Mistral launchers even before the civil war in 2004. Following the civil war, Batch I and II ships would be refitted with a Goalkeeper launcher. Batch III ships received two launchers. The Goalkeeper itself is a 17-round close-in-weapon system, firing the VT-2 missile, a modification of the VT-1 missile.

All ships were equipped with two four-missile launchers for anti-shipping missiles. The first ships were fitted with MM.40 Block 2 Exocet missiles with a range of 72 kilometers. Later some ships would get the new MM.90 anti-shipping missile, a supersonic anti-ship missile with a range of 200 kilometers. Budgetary restraints would mean not all ships would get the MM.90. As an interim measure, a number of ships would get the MM.40 Block 3 Exocet instead. The Block 3 has additional guidance abilities allowing it to be used as a land-attack missile. As well, it has improved maneuverability as well as a new air-breathing engine giving it a much greater distance of 180 kilometers. Many Block 3 missiles are instead conversions of existing Block 2 stocks.

Torpedoes

The ships are all equipped with 2 533mm torpedo tubes on both sides of the ship. They are designed to use the L5 and L17 series and later MU90 series of anti-submarine torpedoes.

Sensors

Radars

On Batch I and II ships wide-area aerial search was done by the D-band DRBV-26 series of radar, originally these were DRBV-26C with a range of 300km, but quickly replaced by DRBV-26D radars with an instrumental range of some 400km. Both series of radars could track up to 64 targets. Following upgrades to the Batch I and II ships and standard on the new Batch III ships these radars are then replaced by the DRBV-27L, a variant of the larger DRBV-27A which is used by the Chacal-class of air defense frigates but with a shorter search range as its radar array is smaller. It shares much of the below-deck components to the DRBV-26C/D radars with a passive phased array antenna replacing the older antenna. The DRBV-27L also, like with the 27A, has the capacity to track up to 200 targets at once. The DRBV-26 series was used by previous classes of warships and was an effective, low-cost wide-area search radar.

Batch I and II ships use S-band multi-function radar 2D Sea Tiger Mk2, known in the Sieuxerrian Navy as DRBV 15C. The DRBV 15C radar has an instrumental range of 130km. Batch III ships had the Sea Tiger radar removed in favor of the C-band Kronos Grand Naval radar. The Kronos Grand Naval features greatly improved capabilities over the Sea Tiger, including detection of various threats including high-speed sea-skimming anti-ship missiles, or small fast-attack craft. The range of the Kronos radar is 250 kilometers.

There are also two helicopter and navigation search radars and also fire control radars.

Ships in class

Name	Hull no.	Builder	Laid down	Launched	Commissioned	Home port	Status
Sieuxerrian Navy
Batch I
Aventurier	X650	Arsenal de Neons, Neons	1993	1994	1996	Vaudouan Naval Base, Sieuxerr	Active
Le Fantasque	X651	Arsenal de Neons, Neons	1993	1994	1996	AVA Joint Base Portcullia, Portcullia	Active
Joueur	X652	Arsenal de Vaudouan, Vaudouan	1994	1995	1997	Neons Naval Base, Sieuxerr	Active
Mercenaire	X653	Arsenal de Neons, Neons	1994	1995	1997	Briquemont Naval Base, Sieuxerr	Active
Le Malin	X654	Arsenal de Vaudouan, Vaudouan	1994	1995	1997	AVA Joint Base Portcullia, Portcullia	Active
Le Terrible	X655	Arsenal de Neons, Neons	1994	1995	1997	Vaudouan Naval Base, Sieuxerr	Active
Fanfaron	X656	Arsenal de Vaudouan, Vaudouan	1995	1996	1998	Vaudouan Naval Base, Sieuxerr	Active,
Voyageur	X657	Arsenal de Neons, Neons	1995	1996	1998	Vaudouan Naval Base, Sieuxerr	Active
L'Indomptable	X658	Arsenal de Vaudouan, Vaudouan	1995	1996	1998	Briquemont Naval Base, Sieuxerr	Active
L'Audacieux	X659	Arsenal de Neons, Neons	1995	1996	1998	Vaudouan Naval Base, Sieuxerr	Active
Explorateur	X660	Arsenal de Vaudouan, Vaudouan	1996	1997	1999	Vaudouan Naval Base, Sieuxerr	Active
Le Triomphant	X661	Arsenal de Vaudouan, Vaudouan	1996	1997	1999	Briquemont Naval Base, Sieuxerr	Active
Batch II
Bourrasque	X662	Arsenal de Neons, Neons	1999	2002	2004	AVA Joint Base Portcullia, Portcullia	Active
Cyclone	X663	Arsenal de Vaudouan, Vaudouan	2000	2002	2004	Neons Naval Base, Sieuxerr	Active
Orage	X664	Arsenal de Vaudouan, Vaudouan	2001	2003	2005	Briquemont Naval Base, Sieuxerr	Active
Simoun	X665	Arsenal de Vaudouan, Vaudouan	2002	2004	2006	Vaudouan Naval Base, Sieuxerr	Active
Batch III
Mogador	X667	Chantiers Navals Courtillers, Courtillers	2007	2009	2010	AVA Joint Base Portcullia, Portcullia	Active
Sirocco	X668	Arsenal de Vaudouan, Vaudouan	2008	2010	2011	Vaudouan Naval Base, Sieuxerr	Active
Volta	X669	Chantiers Navals Courtillers, Courtillers	2009	2011	2012	Vaudouan Naval Base, Sieuxerr	Active
Tempête	X670	Arsenal de Vaudouan, Vaudouan	2010	2012	2013	Vaudouan Naval Base, Sieuxerr	Active
Kléber	X671	Chantiers Navals Courtillers, Courtillers	2011	2013	2014	Neons Naval Base, Sieuxerr	Active
Desaix	X672	Chantiers Navals Courtillers, Courtillers	2012	2014	2015	Vaudouan Naval Base, Sieuxerr	Active
Tornade	X673	Arsenal de Vaudouan, Vaudouan	2014	2016	2017	Vaudouan Naval Base, Sieuxerr	Active
Tramontane	X674	Arsenal de Vaudouan, Vaudouan	2016	2018	2019	Neons Naval Base, Sieuxerr	Active
Royal Sylvan Navy
ASW
Francisco Navarro	FN	Fincanteiri	1993	1994	1996	, Sylva	Active
Mariano Bienvenida	MB	Fincanteiri	1994	1995	1997	, Sylva	Active
Maximiliano Pardo	MP	Fincanteiri	1996	1997	1999	, Sylva	Active
Felipe Pardo	FP	Fincanteiri	1998	1999	2001	, Sylva	Active
Esteban Lain	EL	Fincanteiri	2000	2001	2002	, Sylva	Active
Martin Carvallo	MC	Fincanteiri	2002	2003	2005	, Sylva	Active
GP
Rigoberto Cabal	RC	Fincanteiri	2004	2005	2006	, Sylva	Active
Sebastian Miralles	SM	Fincanteiri	2006	2007	2008	, Sylva	Active
Camilo Saavedra	CS	Fincanteiri	2008	2009	2010	, Sylva	Active
Alan Amengual	AA	Fincanteiri	2010	2012	2013	, Sylva	Active
Royal Navy (NT)
Maracaibean Navy
Khalistani Navy
Batavaian Navy