Mare Island Naval Shipyard

E45161

United States Navy facility naval shipyard

Mare Island Naval Shipyard was a major U.S. Navy shipbuilding and repair facility in Vallejo, California, notable as one of the first permanent naval shipyards on the West Coast.

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All labels observed (6)

Label	Occurrences
Mare Island Naval Shipyard canonical	15
Mare Island	9
Mare Island Navy Yard	2
Mare Island Historic Park	1
Mare Island Naval Shipyard (redeveloped site)	1
Mare Island, California	1

How this entity was disambiguated

This entity first appeared as the object of triple T354626 — 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: Mare Island Naval Shipyard
Context triple: [USS California (BB-44), builder, Mare Island Naval Shipyard]

A. Naval Base Point Loma
Naval Base Point Loma is a major U.S. Navy installation in San Diego, California, that serves as a key hub for submarine operations and other maritime military activities.
B. Pearl Harbor Naval Shipyard
Pearl Harbor Naval Shipyard is a major U.S. Navy industrial facility in Hawaii that provides maintenance, repair, and modernization services for naval vessels and submarines.
C. Puget Sound Navy Yard
Puget Sound Navy Yard, now known as Puget Sound Naval Shipyard, is a major U.S. Navy shipbuilding and repair facility located in Bremerton, Washington.
D. Naval Station Norfolk
Naval Station Norfolk is the world’s largest naval base and a major hub for the U.S. Navy’s Atlantic Fleet, located in Norfolk, Virginia.
E. San Francisco Maritime National Historical Park
San Francisco Maritime National Historical Park is a waterfront national historical park in San Francisco that preserves and interprets the city’s rich maritime heritage through historic ships, a museum, and educational exhibits.
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: Mare Island Naval Shipyard
Target entity description: Mare Island Naval Shipyard was a major U.S. Navy shipbuilding and repair facility in Vallejo, California, notable as one of the first permanent naval shipyards on the West Coast.

A. Naval Base Point Loma
Naval Base Point Loma is a major U.S. Navy installation in San Diego, California, that serves as a key hub for submarine operations and other maritime military activities.
B. Pearl Harbor Naval Shipyard
Pearl Harbor Naval Shipyard is a major U.S. Navy industrial facility in Hawaii that provides maintenance, repair, and modernization services for naval vessels and submarines.
C. Puget Sound Navy Yard
Puget Sound Navy Yard, now known as Puget Sound Naval Shipyard, is a major U.S. Navy shipbuilding and repair facility located in Bremerton, Washington.
D. Naval Station Norfolk
Naval Station Norfolk is the world’s largest naval base and a major hub for the U.S. Navy’s Atlantic Fleet, located in Norfolk, Virginia.
E. San Francisco Maritime National Historical Park
San Francisco Maritime National Historical Park is a waterfront national historical park in San Francisco that preserves and interprets the city’s rich maritime heritage through historic ships, a museum, and educational exhibits.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	United States Navy facility ⓘ naval shipyard ⓘ
closed	1996 ⓘ
commissioned	January 1854 ⓘ
constructionStarted	1854 ⓘ
contains	Mare Island Naval Cemetery ⓘ St. Peter's Chapel ⓘ historic dry docks ⓘ naval industrial buildings ⓘ officers' housing ⓘ
continent	North America ⓘ
country	United States ⓘ linked to: United States of America
currentUse	historic preservation district ⓘ industrial and commercial park ⓘ mixed-use redevelopment area ⓘ residential area ⓘ
decommissioned	1996 ⓘ
era	American Civil War ⓘ Cold War ⓘ World War I ⓘ World War II ⓘ
established	1854 ⓘ
heritageStatus	listed on the National Register of Historic Places ⓘ
locatedIn	San Francisco Bay Area ⓘ San Pablo Bay ⓘ Solano County, California ⓘ linked to: Solano County
locatedOn	Mare Island ⓘ linked to: Mare Island Naval Shipyard
location	Vallejo, California ⓘ linked to: Vallejo
namedAfter	Mare Island ⓘ linked to: Mare Island Naval Shipyard
near	City of Vallejo ⓘ linked to: Vallejo
notableActivity	construction of auxiliary ships ⓘ construction of destroyer escorts ⓘ construction of submarines ⓘ
notableRole	important submarine construction yard during the Cold War ⓘ major West Coast ship repair facility during World War II ⓘ
operator	United States Navy ⓘ
ownedBy	United States federal government ⓘ linked to: United States government
partOf	United States Pacific Fleet infrastructure ⓘ
peakEmployment	over 40,000 workers during World War II ⓘ
primaryFunction	overhaul of naval vessels ⓘ ship repair ⓘ shipbuilding ⓘ
reasonForClosure	Base Realignment and Closure (BRAC) process ⓘ linked to: Base Realignment and Closure 2005
region	Northern California ⓘ
significance	first United States Navy base established on the Pacific Ocean ⓘ one of the first permanent U.S. naval shipyards on the West Coast ⓘ
state	California ⓘ linked to: California, United States
waterway	Carquinez Strait ⓘ linked to: Carquinez Pass Napa River ⓘ

How these facts were elicited

Referenced by (29)

Full triples — surface form annotated when it differs from this entity's canonical label.

USS California (BB-44) → builder → Mare Island Naval Shipyard ⓘ

Vallejo → hasLandmark → Mare Island Naval Shipyard ⓘ

Vallejo → hasLandmark → Mare Island ⓘ