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Triomphant-class submarine
Photo: Tangopaso · Wikimedia Commons · Public domain
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Triomphant-classsubmarine

Ballistic Missile Submarines (SSBN) · France · 1994
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Triomphant-classsubmarine

Triomphant-class submarine
Triomphant-class submarine Photo: Tangopaso · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Stealth
95
Missile Payload
85
Survivability
90
Endurance
95
Diving Depth
80
Sensors
85
Reliability
80
Second-Strike Capability
95
Strategic Impact
90
Technology
85
Origin France
ManufacturerNaval Group
CategoryBallistic Missile Submarines (SSBN)
EraPost-Cold War
In service1994–2010
Operators1 countries
Quantity4
Data Quality82%
90
Ballistic Missile Submarines (SSBN) MASS Rating
2/5
Post-Cold War
4/33
All-Time
Ballistic Missile Submarines (SSBN) · 10 axes scored
Stealth
95
Missile Payload
85
Survivability
90
Endurance
95
Diving Depth
80
Sensors
85
Reliability
80
Second-Strike Capability
95
Strategic Impact
90
Technology
85
ⓘ Regardless of era, the same scoring system applies to all units in the ballistic missile submarines (ssbn) category.
01 / Overview
Triomphant-class submarine
Country
Prime contractor
Production
1994–2010
Quantity
4
Unit Price (current)
$6.4B↗ 50% inflation · 2009→2025
Original Price
$4.3B (2009)
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
BALLISTIC MISSILE SUBMARINES (SSBN) · POST-COLD WAR
2
PERFORMANCE/PRICE
65
UNIT COST (2025 USD)
$6.4B
Original: $4.3B (2009)
Inflation: +%50
90
ballistic missile submarines (ssbn) category
ⓘ Performance/Price and MASS score are computed across all units in the ballistic missile submarines (ssbn) category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
  • Hull ClassificationBallistic missile submarine
  • Submarine TypeSSBN
  • Builder / ShipyardDCNS
  • Laid Down1986
  • Commissioned1997
  • Boats in Class4
  • In ServiceYes
◈Displacement & Dimensions5MOD.5
  • Surfaced Displacement12,640 t
  • Submerged Displacement14,335 t
  • Length138 m
  • Beam12.5 m
  • Draft10.6 m
▣Propulsion7MOD.7
◇Diving & Endurance2MOD.2
  • Test Depth400 m
  • Complement (crew)115
◆Armament7MOD.7
▤Sensors6MOD.6
▲Production3MOD.3
  • Unit Cost4,275,000,000 USD
  • First of Class1997
  • Operators1
◎Fleet Status8MOD.8
  • Completed4
  • Active4
  • Under Construction0
  • Planned4
  • Cancelled0
  • Lost0
  • Retired0
  • Preserved0
03 / History
SERVICE LIFESPANStill in Service
  1. 1994Production started
  2. 2010Production ended
32
years in service
16
years in production
4
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Inventory1country · 4units
4active
📖 TERMS ON THIS PAGE10terms
Anechoic coating: A type of sonar-absorbing material applied to submarines to reduce their acoustic signature. It consists of rubber or other materials with properties that minimize sound reflection.
Anti-ship missiles are guided missiles designed to engage and destroy naval vessels. They are typically used by aircraft, ships, or submarines to attack enemy ships.
Ballistic missiles are rocket‑propelled weapons that follow a ballistic trajectory after launch, delivering warheads over long distances; submarine‑launched variants (SLBMs) are fired from submerged submarines.
Cruise missiles are self-propelled, guided weapons launched from platforms like attack submarines (SSNs) to deliver warheads over long distances with precision.
Electronic Support Measures/ELectronic INTelligence suite: a sensor system on submarines that detects, identifies, and locates radar and communication emissions for passive threat assessment and tactical advantage.
Sonar system mounted on submarine's flanks to detect targets.
Relating to or using nuclear energy, typically fission, for propulsion or power generation in military vessels.
A pump-jet propulsor is a type of propulsion system used in submarines, utilizing a pump-jet to generate thrust.
A system of hydrophones towed behind a vessel to detect submarines and torpedoes, minimizing interference from the ship's self-noise.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Ballistic Missile Submarines (SSBN) entry →