HMS Thetis
E751543
HMS Thetis was a British Royal Navy T-class submarine launched in the late 1930s that tragically sank during sea trials in Liverpool Bay, resulting in significant loss of life.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HMS Thetis canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8121028 — 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: HMS Thetis Context triple: [Cammell Laird, built, HMS Thetis]
-
A.
HMS Achilles
HMS Achilles was a Royal Navy Leander-class light cruiser best known for its role in the Battle of the River Plate during World War II.
-
B.
HMS Glasgow
HMS Glasgow is a Royal Navy warship serving as the lead vessel of the advanced Type 26 City-class anti-submarine frigates designed for global combat and escort operations.
-
C.
HMS Scorpion
HMS Scorpion was a British Royal Navy destroyer that served during World War II, notably participating in Arctic convoy escort duties and major naval engagements against German forces.
-
D.
HMS Edinburgh
HMS Edinburgh was a Royal Navy warship best known for her service in the mid-19th century, including participation in key Baltic operations during the Crimean War.
-
E.
HMS Arethusa
HMS Arethusa was a British Royal Navy light cruiser that served prominently during the early years of World War II, including North Sea operations and convoy escort duties.
- 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: HMS Thetis Target entity description: HMS Thetis was a British Royal Navy T-class submarine launched in the late 1930s that tragically sank during sea trials in Liverpool Bay, resulting in significant loss of life.
-
A.
HMS Achilles
HMS Achilles was a Royal Navy Leander-class light cruiser best known for its role in the Battle of the River Plate during World War II.
-
B.
HMS Glasgow
HMS Glasgow is a Royal Navy warship serving as the lead vessel of the advanced Type 26 City-class anti-submarine frigates designed for global combat and escort operations.
-
C.
HMS Scorpion
HMS Scorpion was a British Royal Navy destroyer that served during World War II, notably participating in Arctic convoy escort duties and major naval engagements against German forces.
-
D.
HMS Edinburgh
HMS Edinburgh was a Royal Navy warship best known for her service in the mid-19th century, including participation in key Baltic operations during the Crimean War.
-
E.
HMS Arethusa
HMS Arethusa was a British Royal Navy light cruiser that served prominently during the early years of World War II, including North Sea operations and convoy escort duties.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Royal Navy submarine
ⓘ
T-class submarine ⓘ |
| additionalPersonnelOnBoard |
civilian technicians
ⓘ
dockyard workers ⓘ naval observers ⓘ |
| armament |
deck gun
ⓘ
torpedo tubes ⓘ |
| beam | 7.77 metres ⓘ |
| builder | Cammell Laird ⓘ |
| builtAt | Birkenhead ⓘ |
| causeOfSinking |
flooding through forward torpedo tube
ⓘ
human error ⓘ |
| class | T-class ⓘ |
| country | United Kingdom ⓘ |
| crewComplement | about 53 ⓘ |
| dateOfSalvage | September 1939 ⓘ |
| dateOfSinking | 1 June 1939 ⓘ |
| displacement |
1090 tons surfaced
ⓘ
1575 tons submerged ⓘ |
| fate | sank during sea trials ⓘ |
| hullNumber | N25 ⓘ |
| impact | changes to Royal Navy submarine safety procedures ⓘ |
| incidentKnownAs | Thetis disaster ⓘ |
| laidDown | 21 December 1936 ⓘ |
| launched | 29 June 1938 ⓘ |
| legalOutcome | Board of Inquiry ⓘ |
| length | 84.28 metres ⓘ |
| memorialLocation |
Anglesey
ⓘ
Liverpool ⓘ |
| namedAfter |
Thetis (sea nymph in Greek mythology)
ⓘ
linked to:
Thetis
|
| notableFor | worst peacetime submarine disaster in Royal Navy history ⓘ |
| notableSurvivor |
Leading Stoker Walter Arnold
ⓘ
Lieutenant Commander Guy Bolus ⓘ |
| numberOfDeaths | 99 ⓘ |
| numberOfPeopleOnBoard | 103 ⓘ |
| numberOfSurvivors | 4 ⓘ |
| operator | Royal Navy ⓘ |
| pennantNumber | N25 ⓘ |
| placeOfSinking | Liverpool Bay ⓘ |
| propulsion | diesel-electric ⓘ |
| recommissionedAs | HMS Thunderbolt ⓘ |
| renamed | HMS Thunderbolt ⓘ |
| salvaged | yes ⓘ |
| serviceEntry | late 1930s ⓘ |
| testType | sea trials ⓘ |
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: HMS Thetis Description of subject: HMS Thetis was a British Royal Navy T-class submarine launched in the late 1930s that tragically sank during sea trials in Liverpool Bay, resulting in significant loss of life.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.