Ruhrstahl SD 1400 X
E949231
World War II aerial bomb
armor-piercing bomb
glide bomb
precision-guided munition
radio-guided weapon
Ruhrstahl SD 1400 X, also known as Fritz X, was a German World War II radio-guided armor-piercing glide bomb and one of the first precision-guided munitions used in combat.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ruhrstahl SD 1400 X canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11843578 — 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: Ruhrstahl SD 1400 X Context triple: [Fritz X, alsoKnownAs, Ruhrstahl SD 1400 X]
-
A.
Siemens SD-160
The Siemens SD-160 is a high-floor light rail vehicle widely used in North American transit systems, including Calgary’s CTrain, known for its modular design and reliable urban service.
-
B.
Siemens SD-400
The Siemens SD-400 is a light rail vehicle model built by Siemens for use on systems such as the St. Louis MetroLink, featuring articulated, electrically powered cars designed for urban transit.
-
C.
Siemens SD100
The Siemens SD100 is a light rail vehicle model built by Siemens for use on urban trolley and light rail systems such as the San Diego Trolley.
-
D.
SG Planitz
SG Planitz was a former German football club that later became part of what is now known as FSV Zwickau.
-
E.
X-Gerät
X-Gerät was an advanced World War II German radio navigation and bombing guidance system used by the Luftwaffe for precision night bombing.
- 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: Ruhrstahl SD 1400 X Target entity description: Ruhrstahl SD 1400 X, also known as Fritz X, was a German World War II radio-guided armor-piercing glide bomb and one of the first precision-guided munitions used in combat.
-
A.
Siemens SD-160
The Siemens SD-160 is a high-floor light rail vehicle widely used in North American transit systems, including Calgary’s CTrain, known for its modular design and reliable urban service.
-
B.
Siemens SD-400
The Siemens SD-400 is a light rail vehicle model built by Siemens for use on systems such as the St. Louis MetroLink, featuring articulated, electrically powered cars designed for urban transit.
-
C.
Siemens SD100
The Siemens SD100 is a light rail vehicle model built by Siemens for use on urban trolley and light rail systems such as the San Diego Trolley.
-
D.
SG Planitz
SG Planitz was a former German football club that later became part of what is now known as FSV Zwickau.
-
E.
X-Gerät
X-Gerät was an advanced World War II German radio navigation and bombing guidance system used by the Luftwaffe for precision night bombing.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
World War II aerial bomb
ⓘ
armor-piercing bomb ⓘ glide bomb ⓘ precision-guided munition ⓘ radio-guided weapon ⓘ |
| alsoKnownAs |
FX 1400
NERFINISHED
ⓘ
Fritz X NERFINISHED ⓘ X-1 NERFINISHED ⓘ |
| category |
German World War II weapons
ⓘ
air-to-surface missiles and bombs ⓘ |
| conflict | World War II ⓘ |
| controlMethod | manual command to line of sight ⓘ |
| countryOfOrigin | Nazi Germany ⓘ |
| deployedBy | III./KG 100 NERFINISHED ⓘ |
| deploymentRegion |
Atlantic Ocean
NERFINISHED
ⓘ
Bay of Biscay NERFINISHED ⓘ Mediterranean Sea NERFINISHED ⓘ |
| designedFor | penetrating battleship deck armor ⓘ |
| designer | Max Kramer NERFINISHED ⓘ |
| detonationMethod | impact fuze ⓘ |
| developmentStatus | operational during World War II ⓘ |
| era | 1940s ⓘ |
| guidanceSystem |
Kehl-Strasbourg FuG 203/230 system
NERFINISHED
ⓘ
radio command guidance ⓘ |
| influenced | postwar guided bomb development ⓘ |
| launchPlatform |
Dornier Do 217
NERFINISHED
ⓘ
Heinkel He 111 NERFINISHED ⓘ Heinkel He 177 NERFINISHED ⓘ Junkers Ju 88 NERFINISHED ⓘ |
| manufacturer | Ruhrstahl NERFINISHED ⓘ |
| notableEngagement |
attack on Italian battleship Roma
ⓘ
attacks on Allied ships off Salerno ⓘ |
| notableFor |
being one of the first precision-guided munitions used in combat
ⓘ
sinking the Italian battleship Roma ⓘ |
| operatorPosition | launch aircraft ⓘ |
| originatingOrganization | German Air Ministry (RLM) NERFINISHED ⓘ |
| primaryTargetType |
battleships
ⓘ
cruisers ⓘ heavily armored ships ⓘ |
| propulsion | unpowered glide ⓘ |
| releaseMode | air-dropped from high altitude ⓘ |
| serviceEntry | 1943 ⓘ |
| statusAfterWar | obsolete ⓘ |
| usedAgainst | Allied naval forces ⓘ |
| usedAs | anti-ship weapon ⓘ |
| usedBy | Luftwaffe ⓘ |
| warheadType | armor-piercing ⓘ |
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: Ruhrstahl SD 1400 X Description of subject: Ruhrstahl SD 1400 X, also known as Fritz X, was a German World War II radio-guided armor-piercing glide bomb and one of the first precision-guided munitions used in combat.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Fritz X