NAS Johnsville
| Naval Air Warfare Center Warminster | |||||||||||
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Aerial view of the NADC in the early 1970s
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| Summary | |||||||||||
| Airport type | Military: Naval Air Station | ||||||||||
| Operator | United States Navy | ||||||||||
| Location | Warminster, Pennsylvania | ||||||||||
| Built | 1930s | ||||||||||
| In use | 1940 | ||||||||||
| Occupants | Navy | ||||||||||
| Elevation AMSL | 375 ft / 114 m | ||||||||||
| Coordinates | 40°11′0.00″N 075°03′58.00″W / 40.1833333°N 75.0661111°WCoordinates: 40°11′0.00″N 075°03′58.00″W / 40.1833333°N 75.0661111°W | ||||||||||
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 Location of the former Naval Air Development Center Pennsylvania
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| Location | Warminster and Ivyland, Pennsylvania |
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| Coordinates | 40°11′35″N 75°04′31″W / 40.19295°N 75.07532°W |
| PA marker dedicated | 11 November 1998 |
Naval Air Warfare Center Warminster (IATA: NJP, ICAO: KNJP) was a U.S. Navy military installation located in Warminster, Pennsylvania and Ivyland, Pennsylvania. For most of its existence (1944–1996), the base was known as the Naval Air Development Center, Johnsville, NADC, or simply, Johnsville.
The U.S. Navy purchased the grounds to establish this facility from the Brewster Aeronautical Corporation following its bankruptcy in the 1940s. The Brewster Buccaneer dive bomber was produced by Brewster at this location. It was named Brewster Field. After the US Navy took over in 1944, it was renamed NAMU (Naval Manufacturing Unit Johnsville). It was a modification center for fleet aircraft before joining the fleet. Wing panels for PBY's were manufactured here for assembly on planes at Mustin Field at the Philadelphia Naval Aircraft factory; the Gorgon missile and TD2N target drone were manufactured at the plant. The famous Chance Vought F4U Corsair was also modified here, with the Brewster F3A version being built here during WW2. It was renamed a Naval Air Development Center in 1952. The facility played an important role in Project Mercury.
The base was closed by the federal government Base Realignment and Closure action in the 1990s and most of its operations were transferred to Naval Air Station Patuxent River in Lexington Park, Maryland. In 1992, as part of the BRAC, the NADC Navigation Department (Code 40) was transferred to NCCOSC (Naval Command, Control and Ocean Surveillance Center) Research, Test and Evaluation (RDT&E) Division San Diego, CA. NRaD Warminster Detachment ultimately relocated to San Diego when the base closed on 30 September 1996.
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