Data Quality84%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the attack submarines (ssn) category.
01 / Overview
Valiant-class attack submarine
Category
Country
Prime contractor
Production
1963–1966
Quantity
2
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
ATTACK SUBMARINES (SSN) · COLD WAR
10
PERFORMANCE/PRICE
60
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the attack submarines (ssn) category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
- Hull Classificationfleet submarine
- Submarine TypeNuclear submarine
- Builder / ShipyardVickers Armstrong
- Laid Down1960
- Commissioned1966
- Boats in Class2
- In ServiceNo
◈Displacement & Dimensions5MOD.5
- Surfaced Displacement4,400 t
- Submerged Displacement4,900 t
- Length86.87 m
- Beam10.13 m
- Draft8.23 m
▣Propulsion6MOD.6
- PropulsionNuclear
- Reactor TypeRolls-Royce pressurised water reactor
- Nuclear-PoweredYes
- Air-Independent Propulsion (AIP)No
- Top Speed (surfaced)20 kn
- Top Speed (submerged)29 kn
◇Diving & Endurance1MOD.1
- Complement (crew)103
◆Armament6MOD.6
- Torpedo Tubes6
- Torpedo Tube Diameter533 mm
- Cruise MissilesYes
- Ballistic Missiles (SLBM)No
- Anti-Ship MissilesYes
- Mine-Laying CapableYes
▤Stealth1MOD.1
⬢Production2MOD.2
- First of Class1966
- Operators1
▲Fleet Status8MOD.8
- Completed2
- Active0
- Under Construction0
- Planned0
- Cancelled0
- Lost0
- Retired2
- Preserved0
03 / History
SERVICE LIFESPANStill in Service
- 1963Production started
- 1966Entered service
63
years in service
3
years in production
2
units produced
1
countries operating
ⓘ The producing country still actively operates it.
05 / MASS Score
ATTACK SUBMARINES (SSN) RANKING Attack Submarines (SSN) · Cold War
MASS RANKINGSMASS ↗
18ATTACK SUBMARINES (SSN)10COLD WAR · ATTACK SUBMARINES (SSN)186UNITED KINGDOM · ALL WEAPONS19PERFORMANCE/PRICE · ATTACK SUBMARINES (SSN)
ⓘ Rankings are within theAttack Submarines (SSN)category.
📖 TERMS ON THIS PAGE5terms
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.
Cruise missiles are self-propelled, guided weapons launched from platforms like attack submarines (SSNs) to deliver warheads over long distances with precision.
Laying explosive mines underwater from a submarine.
Relating to or using nuclear energy, typically fission, for propulsion or power generation in military vessels.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources