Sierra-class submarine
E815808
The Sierra-class submarine is a Russian nuclear-powered attack submarine class known for its titanium hull construction, deep-diving capability, and advanced acoustic stealth compared to earlier Soviet designs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sierra-class submarine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9503810 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Sierra-class submarine Context triple: [Victor-class submarine, successor, Sierra-class submarine]
-
A.
Upholder-class submarine
The Upholder-class submarine was a class of diesel-electric attack submarines built for the Royal Navy in the late 20th century, later modernized and transferred to Canada where they became the Victoria-class.
-
B.
Vanguard-class submarine
The Vanguard-class submarine is a class of British nuclear-powered ballistic missile submarines that form the seaborne leg of the United Kingdom’s strategic nuclear deterrent.
-
C.
Victor-class submarine
The Victor-class submarine was a series of Soviet nuclear-powered attack submarines developed during the Cold War for high-speed, deep-diving anti-submarine and anti-surface warfare.
-
D.
Delta-class submarine
The Delta-class submarine is a series of Soviet nuclear-powered ballistic missile submarines developed during the Cold War to enhance the USSR’s strategic nuclear deterrent.
-
E.
Archer-class submarine
The Archer-class submarine is a class of modern diesel-electric attack submarines, originally built for the Swedish Navy and later upgraded and operated by the Republic of Singapore Navy for stealthy underwater operations.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Sierra-class submarine Target entity description: The Sierra-class submarine is a Russian nuclear-powered attack submarine class known for its titanium hull construction, deep-diving capability, and advanced acoustic stealth compared to earlier Soviet designs.
-
A.
Upholder-class submarine
The Upholder-class submarine was a class of diesel-electric attack submarines built for the Royal Navy in the late 20th century, later modernized and transferred to Canada where they became the Victoria-class.
-
B.
Vanguard-class submarine
The Vanguard-class submarine is a class of British nuclear-powered ballistic missile submarines that form the seaborne leg of the United Kingdom’s strategic nuclear deterrent.
-
C.
Victor-class submarine
The Victor-class submarine was a series of Soviet nuclear-powered attack submarines developed during the Cold War for high-speed, deep-diving anti-submarine and anti-surface warfare.
-
D.
Delta-class submarine
The Delta-class submarine is a series of Soviet nuclear-powered ballistic missile submarines developed during the Cold War to enhance the USSR’s strategic nuclear deterrent.
-
E.
Archer-class submarine
The Archer-class submarine is a class of modern diesel-electric attack submarines, originally built for the Swedish Navy and later upgraded and operated by the Republic of Singapore Navy for stealthy underwater operations.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Russian submarine class
ⓘ
nuclear-powered attack submarine class ⓘ |
| armament |
anti-ship cruise missiles
ⓘ
anti-submarine torpedoes ⓘ mines ⓘ torpedo tubes ⓘ |
| constructionMaterialAdvantage |
greater depth capability than steel-hulled submarines
ⓘ
improved resistance to corrosion ⓘ reduced magnetic signature ⓘ |
| countryOfOrigin |
Russia
ⓘ
Soviet Union ⓘ |
| designedFor |
deep-water operations
ⓘ
operations under Arctic ice ⓘ |
| designGoal |
enhanced survivability
ⓘ
high-speed underwater performance ⓘ improved stealth over Victor-class submarines ⓘ |
| era | Cold War ⓘ |
| feature |
advanced acoustic stealth
ⓘ
deep-diving capability ⓘ double-hull design ⓘ escape pod in sail ⓘ reduced radiated noise compared to earlier Soviet designs ⓘ retractable bow hydroplanes ⓘ sail-mounted hydroplanes ⓘ titanium pressure hull ⓘ |
| hasVariant |
Project 945 Barrakuda
ⓘ
Project 945A Kondor ⓘ |
| hullMaterial | titanium ⓘ |
| NATOReportingName | Sierra ⓘ |
| navalClassification | SSN ⓘ |
| operator |
Russian Navy
ⓘ
Soviet Navy ⓘ |
| predecessor | Victor-class submarine ⓘ |
| primaryRole |
anti-submarine warfare
ⓘ
anti-surface warfare ⓘ attack submarine ⓘ |
| propulsion | nuclear reactor ⓘ |
| serviceStatus | in service with Russian Navy (as of early 21st century) ⓘ |
| SovietProjectNumber |
Project 945
ⓘ
Project 945A ⓘ
linked to:
Project 945A Kondor
|
| stealthFeature |
anechoic coatings
ⓘ
hydrodynamically optimized hull form ⓘ raft-mounted machinery ⓘ |
| subclass |
Sierra I
ⓘ
Sierra II ⓘ
linked to:
Sierra I
|
| successor |
Akula-class submarine
ⓘ
Yasen-class submarine ⓘ |
| typeOfReactor | pressurized water reactor ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Sierra-class submarine Description of subject: The Sierra-class submarine is a Russian nuclear-powered attack submarine class known for its titanium hull construction, deep-diving capability, and advanced acoustic stealth compared to earlier Soviet designs.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.