Data Quality83%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the attack submarines (ssn) category.
01 / Overview
Sierra-class submarine
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
ATTACK SUBMARINES (SSN) · COLD WAR
14
PERFORMANCE/PRICE
35
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 Classificationtitanium-hulled
- Submarine Typenuclear attack submarine
- Builder / ShipyardKrasnoye Sormovo
- Laid Down1979
- Commissioned1987
- Boats in Class4
- In ServiceYes
◈Displacement & Dimensions5MOD.5
- Surfaced Displacement7,600 t
- Submerged Displacement9,100 t
- Length110 m
- Beam14.2 m
- Draft8.8 m
▣Propulsion7MOD.7
- PropulsionNuclear
- Reactor TypeOK-650 pressurized water reactor
- Nuclear-PoweredYes
- Shaft Power190,000 kW
- Propulsor Typesingle shaft with turbine
- Top Speed (surfaced)10 kn
- Top Speed (submerged)34 kn
◇Diving & Endurance4MOD.4
- Test Depth1,000 m
- Maximum Operating Depth1,000 m
- Submerged Endurance90 day
- Complement (crew)61
◆Armament5MOD.5
- Torpedo Tubes4
- Torpedo Tube Diameter530 mm
- VLS Cells0
- SLBM Count0
- Mine-Laying CapableYes
▤Sensors1MOD.1
⬢Stealth1MOD.1
▲Production2MOD.2
- First of Class1987
- Operators2
◎Fleet Status8MOD.8
- Completed4
- Active2
- Under Construction0
- Planned5
- Cancelled1
- Lost0
- Retired2
- Preserved0
◈Armour1MOD.1
- Armourtitanium pressure hull
03 / History
SERVICE LIFESPANStill in Service
- 1984Production started
- 1989Entered service
- 1992Production ended
42
years in service
8
years in production
4
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 ↗
23ATTACK SUBMARINES (SSN)14COLD WAR · ATTACK SUBMARINES (SSN)993RUSSIA · ALL WEAPONS28PERFORMANCE/PRICE · ATTACK SUBMARINES (SSN)
ⓘ Rankings are within theAttack Submarines (SSN)category.
📖 TERMS ON THIS PAGE4terms
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.
Laying explosive mines underwater from a submarine.
Relating to or using nuclear energy, typically fission, for propulsion or power generation in military vessels.
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