Naval Systems

Suffren-class submarine

Also known as
  • Barracuda-class submarine
  • Barracuda-class SSN
  • Barracuda programme
  • SNA Barracuda
  • Suffren-class SSN

The Suffren-class submarine is France's Barracuda-class nuclear-powered attack submarine family built by Naval Group for the French Navy. It replaces the Rubis-class boats with a larger SSN fitted for MdCN naval cruise missiles, F21 heavyweight torpedoes, SM39 Exocet missiles, mines, optronic masts, special-forces deployment, and a long-service French undersea strike role.

Suffren-class submarine, Nuclear-powered attack submarine, Naval Systems
Image source: Suffren at Cape Brun off Toulon photo

Role in Conflicts

2015 Various Conflicts
Side
Unconfirmed conflict context

No publicly documented use in a named armed conflict found in the sources reviewed. Public sources describe early operational patrols and deployment activity, but not a confirmed conflict use.

Profile / Specs

Profile

Origin
France
Built by
Naval Group
Type
Nuclear-powered attack submarine
Service note
2020s-present
Designer
Naval Group
Designed
Barracuda program launched in 1998; development contract notified at the end of 2006
Produced
First metal cut in 2007; six-boat French Navy program delivering through the end of the decade
Number built
Four delivered by June 2026; three in active service by July 2025; six planned

Specifications

Surface displacement
4,600-4,700 tonnes in Naval Group releases
Submerged displacement
5,100 tonnes in Marine nationale data; 5,200 tonnes in Naval Group releases
Length
99 m in Naval Group releases; 99.5 m in Marine nationale data
Diameter
8.8 m
Crew
Two crews of 65 sailors
Submerged speed
Up to 23 knots
Torpedo tubes
Four 533 mm tubes
Immersion
Deeper than 300 m in Naval Group releases
Propulsion
Pressurised-water reactor with propulsion turbine, turbo generators, and electric motors
Combat system
Sycobs combat system
Sensor fit
Bow sonar, flank arrays, towed very-low-frequency listening array, and mine-avoidance sonar
Armament
MdCN naval cruise missiles, F21 heavyweight torpedoes, SM39 Exocet anti-ship missiles, and mines
Combat System And Missions

The class is a French SSN program rather than a single-weapon launch platform. Official sources describe missions that include intelligence collection, naval force support, anti-submarine and anti-surface warfare, land attack with MdCN, and special-forces deployment.

Strike path

The Suffren class gives French submarines a conventional deep-strike option with MdCN, alongside SM39 anti-ship missiles and F21 heavyweight torpedoes.

Sensors

Marine nationale data lists Sycobs, optronic masts, bow sonar, flank arrays, a towed very-low-frequency listening array, and mine-avoidance sonar.

Service status

By June 2026 four boats had been delivered, with Suffren, Duguay-Trouin, and Tourville already admitted to active service.

Sources: Marine nationale Suffren-class SSN page; Naval Group delivers De Grasse; Exocet SM39 and MdCN firings from Suffren.

Launched Weapons

The class's fitted weapons give it long-range strike and conventional undersea attack options.

Launched itemItem typeLaunch evidence
MdCN / SCALP Naval, Ship- and submarine-launched land-attack cruise missile, ArtilleryMdCN / SCALP NavalSubmarine-launched cruise missile

Naval Group says the Barracuda class gives the French Navy a submarine deep-strike capability with MBDA naval cruise missiles, and MBDA reported a Suffren MdCN test firing during weapon-system qualification.

Sources: Naval Group delivers the Suffren, Exocet SM39 and MdCN firings from Suffren

F21 heavyweight torpedo, 533 mm heavyweight torpedo, MunitionsF21 heavyweight torpedoHeavyweight torpedo

MBDA reported several Suffren F21 heavy-torpedo test firings during trials, while Naval Group identifies F21 as the new-generation torpedo qualified for French SSNs and SSBNs.

Sources: Exocet SM39 and MdCN firings from Suffren, F21 | Naval Group

SM39 Exocet, Submarine-launched anti-ship missile, MunitionsSM39 ExocetSubmarine-launched anti-ship missile

MBDA describes SM39 as the submarine-launched Exocet variant fired from standard 21-inch torpedo tubes, and reported a Suffren SM39 test firing near the DGA missile test centre on Ile du Levant.

Sources: EXOCET SM39 | MBDA, Exocet SM39 and MdCN firings from Suffren

Timeline

Suffren-class submarine Key Events

  1. Barracuda program launched

    The French Defence Procurement Agency launched the Barracuda program to renew France's Rubis-class nuclear attack submarine force.

    Sources: Naval Group delivers the Suffren

  2. Development contract notified

    Naval Group says the associated Barracuda development contract was notified at the end of 2006 after more than ten years of studies.

    Sources: Naval Group delivers the Suffren

  3. First metal cut for Suffren

    The first metal sheet for Suffren was cut less than a year after the acquisition contract.

    Sources: Naval Group delivers the Suffren

  4. Suffren is delivered to the French state

    Naval Group delivered Suffren to the French Defence Procurement Agency, marking the first delivery in the Barracuda program.

    Sources: Naval Group delivers the Suffren

  5. Suffren enters active service

    The Marine nationale lists Suffren as admitted to active service on June 3, 2022.

    Sources: Marine nationale Suffren-class SSN page

  6. First operational deployment ends

    The French Navy announced that Suffren and its blue crew completed their first operational deployment with the Charles de Gaulle carrier strike group.

    Sources: Suffren first operational deployment

  7. Suffren makes a port call in Abu Dhabi

    Naval News reported that the French Military announced a first port call for Suffren in Abu Dhabi, and that the submarine was fitted with its dry deck shelter.

    Sources: Suffren Abu Dhabi port call

  8. Duguay-Trouin enters active service

    The French Navy announced active-service admission for Duguay-Trouin, the second Suffren-type SSN.

    Sources: Duguay-Trouin active-service admission

  9. Suffren-class submarine takes part in simultaneous MdCN firing

    A Suffren-class submarine and the FREMM frigate Aquitaine conducted a simultaneous MdCN training firing against a land target at the DGA Landes missile-test site.

    Sources: Marine nationale 2024 MdCN double firing

  10. Tourville enters active service

    The Marine nationale lists Tourville, the third Suffren-type submarine, as admitted to active service on July 4, 2025.

    Sources: Marine nationale Suffren-class SSN page

  11. De Grasse delivered

    Naval Group delivered De Grasse, the fourth Barracuda-class SSN, after dockside trials, nuclear boiler commissioning, and a four-month sea-trials campaign.

    Sources: Naval Group delivers De Grasse

Media

Suffren-class submarine Videos

Suffren-class submarine Images

Suffren-class submarine, Nuclear-powered attack submarine, Naval Systems - view 1
Source: Suffren class SSN schematic
Suffren-class submarine, Nuclear-powered attack submarine, Naval Systems - view 2
Source: Suffren vs Rubis comparison
Related Weapon Systems
MdCN / SCALP Naval, Ship- and submarine-launched land-attack cruise missile, ArtilleryArtilleryMdCN / SCALP NavalShip- and submarine-launched land-attack cruise missileMdCN, also called SCALP Naval or NCM, is MBDA's French naval cruise missile for precision land attack from FREMM frigates and Barracuda/Suffren-class submarines. MBDA describes the weapon as a very-long-range, metric-accuracy deep-strike missile launched either from A70 SYLVER vertical cells or 21-inch submarine torpedo tubes, and French forces used it operationally during the April 2018 U.S., UK, and French strikes in the 2011 Syrian Civil War.
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Oscar II-class submarine, Nuclear-powered cruise missile submarine, Naval SystemsNaval SystemsOscar II-class submarineNuclear-powered cruise missile submarineThe Oscar II-class submarine is NATO's reporting name for Project 949A Antey, the improved Soviet/Russian third-generation nuclear-powered cruise-missile submarine designed by Rubin and built by Sevmash. The class was built around a carrier-strike mission with 24 P-700 Granit anti-ship missiles in side launchers, a large double-hull SSGN design, long endurance, and improved crew habitability; later Project 949AM modernization reporting centers on replacing the Granit fit with newer cruise missiles.
Delta IV-class submarine, Nuclear-powered ballistic missile submarine class, Naval SystemsNaval SystemsDelta IV-class submarineNuclear-powered ballistic missile submarine classThe Delta IV-class submarine is the Soviet Project 667BDRM Delfin nuclear-powered ballistic-missile submarine, built by Sevmash for the Northern Fleet and retained by Russia as an aging but still visible sea-based nuclear deterrent. The class carries a D-9RM missile system with 16 R-29RM-family SLBMs, four 533 mm torpedo tubes, and modernized Sineva/Layner-era missiles; public sources distinguish the seven boats built from smaller operational counts as individual hulls cycle through overhaul or replacement by Borei-class SSBNs.

Sources

Naval Group delivers the SuffrenPublisher: Naval Group | Note: Supports manufacturer background, Barracuda/Suffren program launch in 1998, development contract timing, first metal cut on December 10, 2007, lead-boat delivery, replacement of Rubis-class SSNs, design features, propulsion, armament, and published specifications. | Accessed: 2026-07-04France Submarine CapabilitiesPublisher: Nuclear Threat Initiative | Note: Supports Naval Group's role as the primary French naval shipyard and the Barracuda-class background in France's submarine portfolio, including the class's armament mix and submarine force context. | Accessed: 2026-07-04Marine nationale Suffren-class SSN pagePublisher: Marine nationale | Note: Supports current French Navy class description, missions, technical characteristics, sensor and weapon fit, and individual hull active-service status for Suffren, Duguay-Trouin, and Tourville. | Accessed: 2026-07-04Naval Group delivers De GrassePublisher: Naval Group | Note: Supports De Grasse delivery on June 24, 2026, fourth-of-six class status, first three boats in active service by July 2025, final two boats under construction, and updated technical characteristics. | Accessed: 2026-07-04Exocet SM39 and MdCN firings from SuffrenPublisher: MBDA | Note: Supports Suffren weapon-system trial firings of MdCN, Exocet SM39, and F21 heavy torpedoes; this is a qualification and service-readiness source, not direct conflict-use evidence. | Accessed: 2026-07-04EXOCET SM39 | MBDAPublisher: MBDA | Note: Supports SM39 as the submarine-launched Exocet variant, launched from standard 21-inch torpedo tubes, with published dimensions, range, guidance, and launch-vehicle context. | Accessed: 2026-07-04F21 | Naval GroupPublisher: Naval Group | Note: Supports F21 torpedo identity, Artemis program background, qualification for French submarines, guidance description, and published specifications. | Accessed: 2026-07-04Duguay-Trouin active-service admissionPublisher: Marine nationale | Note: Supports Duguay-Trouin active-service admission on April 4, 2024, its position as the second of six Suffren-type SSNs, and Barracuda capability context. | Accessed: 2026-07-04Marine nationale 2024 MdCN double firingPublisher: Marine nationale | Note: Supports the April 18, 2024 simultaneous training firing by FREMM Aquitaine and a Suffren-class SSN, DGA Landes target context, and MdCN carriage on Suffren-class submarines. | Accessed: 2026-07-04Suffren first operational deploymentPublisher: Naval News | Note: Supports Suffren's first operational deployment with the Charles de Gaulle carrier strike group on January 4, 2023. | Accessed: 2026-07-04Suffren Abu Dhabi port callPublisher: Naval News | Note: Supports the Abu Dhabi port call report and the presence of the dry deck shelter during the visit. | Accessed: 2026-07-04Suffren at Cape Brun off Toulon photoPublisher: Wikimedia Commons | Note: Supports image provenance and CC BY-SA 4.0 licensing context for the primary Suffren-class submarine photograph. | Accessed: 2026-07-04Suffren class SSN schematicPublisher: Wikimedia Commons | Note: Supports image provenance and CC BY-SA 4.0 licensing context for the Suffren-class submarine schematic. | Accessed: 2026-07-04Suffren vs Rubis comparisonPublisher: Wikimedia Commons | Note: Supports image provenance and CC BY-SA 2.0 FR licensing context for the Suffren-versus-Rubis comparison graphic. | Accessed: 2026-07-04