LORAN
E258732
LORAN is a long-range terrestrial radio navigation system originally developed for maritime and aviation positioning before the advent of satellite-based GPS.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T2337664 — 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: LORAN Context triple: [Gee, successor, LORAN]
-
A.
Knickebein radio navigation system
The Knickebein radio navigation system was a World War II German Luftwaffe beam-guidance technology used to direct bombers accurately to their targets at night and in poor visibility.
-
B.
Argos satellite system
The Argos satellite system is a global satellite-based data collection and location system used to relay environmental and oceanographic measurements from remote platforms such as Argo floats to data centers.
-
C.
X-Gerät radio navigation system
The X-Gerät radio navigation system was an advanced German World War II blind-bombing aid that used precise radio beams to guide Luftwaffe bombers to their targets at night and in poor visibility.
-
D.
SAN VORTAC
SAN VORTAC is a ground-based radio navigation facility (combining VOR and TACAN) serving the San Diego International Airport area for en-route and approach guidance.
-
E.
GLONASS
GLONASS is Russia’s global satellite navigation system, providing worldwide positioning and timing services as an alternative to GPS.
- 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: LORAN Target entity description: LORAN is a long-range terrestrial radio navigation system originally developed for maritime and aviation positioning before the advent of satellite-based GPS.
-
A.
Knickebein radio navigation system
The Knickebein radio navigation system was a World War II German Luftwaffe beam-guidance technology used to direct bombers accurately to their targets at night and in poor visibility.
-
B.
Argos satellite system
The Argos satellite system is a global satellite-based data collection and location system used to relay environmental and oceanographic measurements from remote platforms such as Argo floats to data centers.
-
C.
X-Gerät radio navigation system
The X-Gerät radio navigation system was an advanced German World War II blind-bombing aid that used precise radio beams to guide Luftwaffe bombers to their targets at night and in poor visibility.
-
D.
SAN VORTAC
SAN VORTAC is a ground-based radio navigation facility (combining VOR and TACAN) serving the San Diego International Airport area for en-route and approach guidance.
-
E.
GLONASS
GLONASS is Russia’s global satellite navigation system, providing worldwide positioning and timing services as an alternative to GPS.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
hyperbolic navigation system
ⓘ
radio navigation system ⓘ terrestrial navigation system ⓘ |
| acronymFor | Long Range Navigation ⓘ |
| application |
coastal navigation
ⓘ
oceanic navigation ⓘ over-water aviation navigation ⓘ |
| coordinateSystem | hyperbolic lines of position ⓘ |
| coverageType | long-range ⓘ |
| dataProvided |
course information
ⓘ
position ⓘ time ⓘ |
| developedDuring |
World War II
ⓘ
surface form:
World War II era
|
| developedFor |
aviation navigation
ⓘ
maritime navigation ⓘ |
| eLORANRole | potential GPS backup system ⓘ |
| frequencyBand | low frequency ⓘ |
| fullName | Long Range Navigation ⓘ |
| infrastructureType | fixed land-based transmitters ⓘ |
| initialUsers |
Allied air forces
ⓘ
Allied navies ⓘ
surface form:
Allied naval forces
United States Armed Forces ⓘ
surface form:
United States military
|
| LORAN-CAccuracy | on the order of hundreds of meters ⓘ |
| LORAN-CFrequencyBand | 100 kHz band ⓘ |
| measurementPrinciple | time difference of arrival ⓘ |
| navigationType | radio-based navigation ⓘ |
| notableVariant |
LORAN
self-linksurface differs
ⓘ
surface form:
LORAN-A
Long Range Navigation ⓘ
surface form:
LORAN-C
LORAN self-linksurface differs ⓘ
surface form:
eLORAN
|
| operationalDomain | terrestrial ⓘ |
| originalDeveloper |
Massachusetts Institute of Technology Radiation Laboratory
ⓘ
United States Navy ⓘ
surface form:
U.S. Navy
United States of America ⓘ
surface form:
United States
|
| positionFixMethod | intersection of hyperbolic lines ⓘ |
| primaryFunction |
navigation
ⓘ
positioning ⓘ |
| primaryUsePeriod | mid-20th century ⓘ |
| rangeCapability | hundreds of nautical miles ⓘ |
| requires |
network of synchronized transmitting stations
ⓘ
precise timing synchronization ⓘ |
| signalPropagationMode |
groundwave
ⓘ
skywave ⓘ |
| signalType | pulsed radio signal ⓘ |
| supersededBy |
GPS
ⓘ
satellite navigation systems ⓘ |
| timingReference | atomic clocks ⓘ |
| userEquipment | LORAN receiver ⓘ |
| usesMedium | radio waves ⓘ |
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: LORAN Description of subject: LORAN is a long-range terrestrial radio navigation system originally developed for maritime and aviation positioning before the advent of satellite-based GPS.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
LORAN-A
this entity surface form:
eLORAN