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Valiant-class attack submarine
Photo: Unknown author · Wikimedia Commons · Public domain
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Valiant-classattacksubmarine

Attack Submarines (SSN) · United Kingdom · 1963
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Valiant-classattacksubmarine

Valiant-class attack submarine
Valiant-class attack submarine Photo: Unknown author · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Stealth
70
Sonar & Sensors
65
Firepower
60
Speed
55
Diving Depth
60
Endurance
80
Survivability
70
Land-Attack Capability
50
Technology
65
Cost-Effectiveness
55
Origin United Kingdom
ManufacturerVickers-Armstrongs
CategoryAttack Submarines (SSN)
EraCold War
In service1963–1966
Operators1 countries
Quantity2
Data Quality84%
MASS(Military Archive Scoring System)
64
Attack Submarines (SSN) MASS Rating
10/16
Cold War
18/31
All-Time
Attack Submarines (SSN) · 10 axes scored
Stealth
70
Sonar & Sensors
65
Firepower
60
Speed
55
Diving Depth
60
Endurance
80
Survivability
70
Land-Attack Capability
50
Technology
65
Cost-Effectiveness
55
ⓘ Regardless of era, the same scoring system applies to all units in the attack submarines (ssn) category.
01 / Overview
Valiant-class attack submarine
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)
—
64
attack submarines (ssn) category
ⓘ 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
◇Diving & Endurance1MOD.1
  • Complement (crew)103
◆Armament6MOD.6
▤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
  1. 1963Production started
  2. 1966Entered service
63
years in service
3
years in production
2
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries1country
📖 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
📖 ENCYCLOPEDIA Browse the Attack Submarines (SSN) entry →