USS Monitor
E411843
The USS Monitor was a pioneering Union ironclad warship of the American Civil War, famed for its revolutionary turreted design and its 1862 battle against the CSS Virginia (Merrimack).
All labels observed (1)
| Label | Occurrences |
|---|---|
| USS Monitor canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T4057730 — 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: USS Monitor Context triple: [Monitor–Merrimac Memorial Bridge–Tunnel, namedAfter, USS Monitor]
-
A.
SS Emancipation
SS Emancipation was a ship employed by the U.S. government during Operation Wetback in the 1950s to transport Mexican nationals deported from the United States.
-
B.
Warrior-class ironclad
The Warrior-class ironclad was a pioneering 19th-century British warship design that introduced large, seagoing, iron-hulled armored frigates to the Royal Navy, marking a major shift from wooden sailing ships to modern armored steam warships.
-
C.
USS Macdonough
USS Macdonough is the name given to several United States Navy warships honoring Commodore Thomas Macdonough, a notable naval officer from the War of 1812.
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D.
USS Lake Champlain
USS Lake Champlain was a U.S. Navy Essex-class aircraft carrier that served in World War II, the Korean War, and later as a recovery ship for early American crewed space missions.
-
E.
USS Maine (ACR-1)
USS Maine (ACR-1) was a U.S. Navy armored cruiser whose mysterious explosion and sinking in Havana Harbor in 1898 helped trigger the Spanish–American War.
- 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: USS Monitor Target entity description: The USS Monitor was a pioneering Union ironclad warship of the American Civil War, famed for its revolutionary turreted design and its 1862 battle against the CSS Virginia (Merrimack).
-
A.
SS Emancipation
SS Emancipation was a ship employed by the U.S. government during Operation Wetback in the 1950s to transport Mexican nationals deported from the United States.
-
B.
Warrior-class ironclad
The Warrior-class ironclad was a pioneering 19th-century British warship design that introduced large, seagoing, iron-hulled armored frigates to the Royal Navy, marking a major shift from wooden sailing ships to modern armored steam warships.
-
C.
USS Macdonough
USS Macdonough is the name given to several United States Navy warships honoring Commodore Thomas Macdonough, a notable naval officer from the War of 1812.
-
D.
USS Lake Champlain
USS Lake Champlain was a U.S. Navy Essex-class aircraft carrier that served in World War II, the Korean War, and later as a recovery ship for early American crewed space missions.
-
E.
USS Maine (ACR-1)
USS Maine (ACR-1) was a U.S. Navy armored cruiser whose mysterious explosion and sinking in Havana Harbor in 1898 helped trigger the Spanish–American War.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Civil War naval vessel
ⓘ
Union warship ⓘ ironclad warship ⓘ steam-powered warship ⓘ |
| allegiance | Union ⓘ |
| armament | two 11-inch Dahlgren smoothbore guns ⓘ |
| associatedWith |
Union blockade of the Confederacy
ⓘ
surface form:
Union blockade of Confederate ports
|
| battle | Battle of Hampton Roads ⓘ |
| beam | approximately 41.5 feet ⓘ |
| builder | Continental Iron Works ⓘ |
| class | Monitor-class ironclad ⓘ |
| commissioned | 1862-02-25 ⓘ |
| conflict | American Civil War ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crewComplement | about 60 officers and men ⓘ |
| designer | John Ericsson ⓘ |
| displacement | approximately 987 long tons ⓘ |
| draft | approximately 10.5 feet ⓘ |
| fate | foundered in a storm off Cape Hatteras ⓘ |
| heritageStatus | U.S. National Historic Landmark (wreck) ⓘ |
| historicalSignificance | marked transition from wooden warships to ironclads ⓘ |
| hullMaterial | iron ⓘ |
| laidDown | 1861-10-25 ⓘ |
| launchDate | 1862-01-30 ⓘ |
| length | approximately 172 feet ⓘ |
| locationOfSinking | off Cape Hatteras, North Carolina ⓘ |
| namesakeOf | monitor warship type ⓘ |
| navalInnovation |
first U.S. Navy ship with a rotating armored turret
ⓘ
pioneered monitor-type warship design ⓘ |
| notableEngagement | Battle of Hampton Roads ⓘ |
| notableFeature |
almost flush deck
ⓘ
iron armor plating ⓘ low freeboard ⓘ revolving gun turret ⓘ |
| operator | United States Navy ⓘ |
| opponent |
CSS Virginia (Merrimack)
ⓘ
surface form:
CSS Merrimack
CSS Virginia ⓘ |
| preservedBy | USS Monitor National Marine Sanctuary ⓘ |
| propulsion | steam engine ⓘ |
| protected | Union wooden warships at Hampton Roads ⓘ |
| serviceEndYear | 1862 ⓘ |
| serviceEntryYear | 1862 ⓘ |
| shipyard | Continental Iron Works ⓘ |
| sunk | 1862-12-31 ⓘ |
| theaterOfOperations |
Atlantic coast
ⓘ
Hampton Roads ⓘ
surface form:
Hampton Roads, Virginia
|
| wreckDiscovered | 1973 ⓘ |
| wreckLocation |
Monitor National Marine Sanctuary
ⓘ
surface form:
Monitor National Marine Sanctuary, Atlantic Ocean
|
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: USS Monitor Description of subject: The USS Monitor was a pioneering Union ironclad warship of the American Civil War, famed for its revolutionary turreted design and its 1862 battle against the CSS Virginia (Merrimack).
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
CSS Virginia