FMM multipurpose frigate

Class overview
Builders:	Fincantieri
Operators:	Sieuxerr Sylva
Preceded by:	T 47-class (Sieuxerr) Aconit-class (Sieuxerr) Tourville-class (Sieuxerr) Georges Leygues-class (Sieuxerr) Other ships used by other nations
Succeeded by:	La Melpomène-class frigate
Subclasses:	ASW, GP, various other subclasses
Built:	1991–2010 (Sieuxerr)
In commission:	1994–present
Planned:	20 (Sieuxerr) 10 (Sylva) 8 (Maracaibo) 6 (Khalistan) 4 (Batavaie) 52 (Total)
Completed:	52
General characteristics
Type:	Frigate
Displacement:	5,400 tonnes 6,500 tonnes
Length:	130.7 m (429 ft) ASW 154.8 m (508 ft) AAW
Beam:	15.9 m (52 ft) ASW 16.4 m (54 ft) AAW
Draft:	5.1 m (17 ft) ASW 5.4 m (18 ft) AAW
Propulsion:	CODOG, 30,000 kW (ASW) CODLOG, 40,000 kW (AAW)
Speed:	30 knots
Range:	5,000 nm @ 19 knots
Complement:	230 ASW 280 AAW
Sensors and processing systems:	Optronics: 1 × Sagem Vampir MB infra-red search and track system (Both) Radars: 1 × DRBJ-17 3D radar (ASW) 1 × DRBJ-19 3D radar (AAW) 1 × DRBV-26 search radar (Early, AAW) 1 × DRBV-27 search radar (Late, AAW) 1 × DRBC-33J fire control radar (Early, Both) 2 × RTN-30X fire control radar (Both) 2 × Navigation and helicopter radars Sonars: 1 × DUBV-24 hull sonar 1 × DUBV 43 towed sonar (Early, ASW) 1 × UMS 4249 CAPTAS4 towed sonar (Late, ASW) 1 × ATBF 2 VDS (AAW) 1 × DSBV 62 TASS (AAW) Communications: Satellite links: Inmarsat, SYRACUSE
Electronic warfare & decoys:	Jammers: 2 × ARBB-33 jammers 2 × BSM jammers Decoy Launchers 2 × SAGAIE launchers (Early, Both) 2 × DAGAIE launchers (Early, Both) 2 × ODLS-H launchers (Late, Both) 2 × SLAT anti torpedo systems (Late, Both)
Armament:	Guns: 1 × Canon de 127 mm Modèle 1991 (Both) 2 × Canon Automatique de 30 mm Modèle 1974 "Cobra" 4 × AA-MAS M.82 13.2mm machine guns Missiles: 4 × 8 cell SYLVER A-50 VLS (ASW) Aster-30 Vipera VL Malafon II 1 × 6 cell SYLVER A-43 VLS (ASW) Vipera VL 1 × 6 cell SYLVER A-35 VLS (ASW) Crotale VT-1 6 × 8 cell SYLVER A-70 VLS (AAW) Aster-30 Vipera VL SCALP EG Malafon III Malafon II 1 × 8 cell SYLVER A-43 VLS (AAW) Vipera VL 2 × 4 Exocet OR MM.90 OR MILAS launchers 2 × Goalkeeper launchers (AAW) Torpedoes: 2 × 2-tube 533mm torpedo launcher for MU90 or L5/L17 torpedoes (10 torpedoes)
Aircraft carried:	1 × AS.332 (ASW) 2 × AS.332 (AAW)

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 Mártir-Santo Mercurio-class.

Design

Armament

Guns

As designed, all ships would be produced with the Sorenoro-produced OTO 127mm L/54 Compact deck gun. The gun was selected over the older 100mm guns previously used to achieve a better surface-bombardment effect. The gun feeds from three twenty-two round drums for a total of sixty-six ready rounds, an additional 500 rounds are stored in the magazine.

The 127mm gun can fire at a rate of forty rounds per minute, giving it roughly one and a half minutes of sustained fire from its ready ammunition. The gun has a number of rounds it can use including high-explosive, illumination, as well, these rounds have a variety of fuzing options. The guns have an effective range of 15,000 meters in bombardment, and roughly half that when used in an anti-air role. New guided ammunition has been produced for these guns, allowing for high-precision fire missions in support of ground forces or in targeting other naval forces.

One part of close-in-defense is provided by two twin-30mm turrets. These guns are 30mm automatic cannons with selectable rates of fire. The turrets have their own fire control radars, but can take cueing from the external directors if needed. The turrets have a combined rof of 1,600 rounds per minute per gun. Each turret has 2,000 ready rounds. The turrets have been relatively unchanged since accepted, however newer targeting systems were added.

Additional guns are provided in the shape of AA-MAS M.82 13.2mm machine guns and 20mm autocannons for defense against small boats.

Missiles

The ships were built chiefly to utilize the new SYLVER vertical launch system and the Principle Area Defense System, or PADS. Various lengths of the SYLVER VLS were to be used for various missiles and to account for weight differences. The earlier ASW class would receive four 8-cell A-50, one 6-cell A-43, and one 6-cell A-35 block. The later AAW version would get six A-70 and one 8-cell A-43 block for VLS cells.

The AAW ships received more and longer VLS cells to fill a new role - cruise missile strike. As well, the much larger and longer-ranged Malafon III anti-submarine missile was to be used by the AAW ships.

On the ASW ships, the 6-cell A-35 block provides close-in-defense in conjunction with the 30mm CIWS. The A-35 cells quad pack the VT-1 Crotale for this purpose. For local defense, the 6-cell A-43 cells are for the Vipera VL. Initially the ships were to use the dual-pack Vipera 3, however a quad-packed solution was under development by this time and all ships were given provisions to take the Vipera 4 when it would be accepted into service.

AAW ships utilize two Goalkeeper launchers, of which each launcher has 17 missiles per launcher. An additional 34 missiles are carried as reloads. A new series of missiles, known as the Goalkeeper I, was accepted in 2010. The Goalkeeper I missile was designed to replace the older Crotales in the self-defense role. Instead of needing guidance from a director or illuminator, the Goalkeeper missile has an IR seeker on the missile itself. It can however take additional commands from a director or illuminator if needed.

For anti-ship duties, all the ships are able to take two 4-missile launchers. All ships can use the variety of the Entente standard anti-ship missiles. Sieuxerrian ships can use the Exocet or MM.90 anti-ship missiles, as well, they are able to, and do on occasion, use the MILAS anti-submarine missile.

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. The torpedo magazine is shared with the helicopter torpedo magazine.

Sensors

Radars

ASW ships were fitted with the DRBJ-17 3D C-band radar, also known as the Casaterran Multifunction Radar or CMR. The radar is a twin-faced passive electronically scanned array radar with an instrumental range of roughly 130 kilometers. The radar is capable of track-while-scan, and can provide data-link updates for up to 16 Aster or Vipera 4VL missiles. The radar can track over 100 targets.

AAW ships were fitted with a much more extensive radar suite, starting with the DRBJ-19 3D radar. Known as Casaterran Multifunction Phased Array Radar, or CAMPAR, is also a C-band radar. CAMPAR is much like the early CMR, but enlarged overall. The system still utilizes a twin faced passive electronically scanned array, however the range is between 150 to over 300 kilometers depending on its operation mode. It can provide data-link updates for more missiles and can have more simultaneous engagements than the CMR radar as well. In the mid-2010s all Sieuxerrian ships received, or were built with, an upgraded CAMPAR radar which instead of the older PESA radars were given new AESA sets.

AAW ships also received a volumetric search radar, the DRBV-26. The radar was at this point a matured legacy system, with a max useful range of over 300 kilometers. The radar operates on the D-band. It can track upwards of 64 targets at any given time. However, along with the upgraded AESA array, Sieuxerrian ships received an upgraded search radar. All ships received the DRBV-27, an upgraded planar array that was developed for use on larger air defense warships. The DRBV-27 provides much more capable detection and tracking, able to detect targets over 400 kilometers away. Hardware and software upgrades as well allowed for an increase in the number of targets it could track, going from 64 to over 200 targets.

Both the AAW and ASW ships have a number of regular helicopter and navigation radars. As well as fire control radars for guidance of the various guns, as well as guidance for the Vipera and Goalkeeper missiles.

Ships in class

Name	Hull no.	Builder	Laid down	Launched	Commissioned	Home port	Status
Sieuxerrian Navy
Type D90 ASW Le Hardi
Le Hardi	D651	Arsenal de Neons, Neons	1991	1992	1994	Vaudouan Naval Base, Sieuxerr	Active
Fleuret	D652	Chantiers Navals Courtillers, Courtillers	1992	1993	1995	AVA Joint Base Portcullia, Portcullia	Active
Épée	D653	Arsenal de Vaudouan, Vaudouan	1993	1994	1996	Neons Naval Base, Sieuxerr	Active
Mameluk	D654	Arsenal de Neons, Neons	1994	1995	1997	Briquemont Naval Base, Sieuxerr	Active
Casque	D655	Arsenal de Neons, Neons	1994	1995	1997	AVA Joint Base Portcullia, Portcullia	Active
Lansquenet	D656	Arsenal de Vaudouan, Vaudouan	1995	1996	1998	Vaudouan Naval Base, Sieuxerr	Active
Le Flibustier	D657	Arsenal de Vaudouan, Vaudouan	1995	1996	1998	Vaudouan Naval Base, Sieuxerr	Active,
Le Corsaire	D658	Chantiers Navals Courtillers, Courtillers	1995	1996	1998	Vaudouan Naval Base, Sieuxerr	Active,
Type D90 AA Aigle
Aigle	D661	Arsenal de Neons, Neons	1996	1998	2000	AVA Joint Base Portcullia, Portcullia	Active
Vautour	D662	Arsenal de Neons, Neons	1996	1998	2000	Neons Naval Base, Sieuxerr	Active
Albatros	D663	Arsenal de Vaudouan, Vaudouan	1998	2000	2002	Briquemont Naval Base, Sieuxerr	Active
Gerfaut	D664	Arsenal de Vaudouan, Vaudouan	1998	2000	2002	Vaudouan Naval Base, Sieuxerr	Active
Milan	D665	Arsenal de Vaudouan, Vaudouan	1998	2000	2002	Vaudouan Naval Base, Sieuxerr	Active
Épervier	D667	Chantiers Navals Courtillers, Courtillers	1998	2000	2002	Vaudouan Naval Base, Sieuxerr	Active
Le Fantasque	D668	Arsenal de Neons, Neons	2002	2004	2006	Vaudouan Naval Base, Sieuxerr	Active
L'Audacieux	D669	Arsenal de Neons, Neons	2002	2004	2006	Vaudouan Naval Base, Sieuxerr	Active
Le Malin	D670	Arsenal de Neons, Neons	2002	2004	2006	Vaudouan Naval Base, Sieuxerr	Active
Le Terrible	D671	Chantiers Navals Courtillers, Courtillers	2002	2004	2006	Vaudouan Naval Base, Sieuxerr	Active
Le Triomphant	D672	Arsenal de Vaudouan, Vaudouan	2006	2008	2010	Vaudouan Naval Base, Sieuxerr	Active
L'Indomptable	D673	Arsenal de Vaudouan, Vaudouan	2006	2008	2010	Vaudouan Naval Base, Sieuxerr	Active
Royal Sylvan Navy
ASW
Mártir-Santo Mercurio	MSM	Fincanteiri	1993	1994	1996	, Sylva	Active
Mártir-Santo Expedito	MSE	Fincanteiri	1994	1995	1997	, Sylva	Active
Mártir-Santo Beso	MSB	Fincanteiri	1996	1997	1999	, Sylva	Active
Santo Agostino Roscelli	SAR	Fincanteiri	1998	1999	2001	, Sylva	Active
Santo Amabilis de Auvernia	SAA	Fincanteiri	2000	2001	2002	, Sylva	Active
GP
Santo Albino de Angers	SAN	Fincanteiri	2002	2003	2005	, Sylva	Active
Santo Fileto	SFI	Fincanteiri	2004	2005	2006	, Sylva	Active
Santo Margarita Burguesa	SMB	Fincanteiri	2006	2007	2008	, Sylva	Active
Santo Ulrico de Augsburgo	SUA	Fincanteiri	2008	2009	2010	, Sylva	Active
Santo José	SAJ	Fincanteiri	2010	2012	2013	, Sylva	Active
Maracaibean Navy
ASW
GP
Khalistani Navy
Batavaian Navy