Brunswick Air Force Station

From FortWiki
Jump to: navigation, search

Brunswick Air Force Station (1951-1965) - A Cold War U.S. Air Force Radar Station established during the Korean War. Located near on Brunswick Naval Air Station near Brunswick in Cumberland County, Maine. Initially assigned a Permanent ID of P-13 and later a Sage ID of Z-13.


Established in January 1951 and became operational in October 1951 as Brunswick Air Force Station manned by the 654th Aircraft Control & Warning (AC&W) Squadron. This site assumed coverage previously provided by a Lashup site at Grenier AFB, New Hampshire (L-4).

Initial equipment included a pair of CPS-6B search radars. A FPS-8 was added in 1955. The FPS-8 was later converted to an GPS-3 that served at Brunswick until it closed in 1965. In 1958 the CPS-6Bs were retired and two FPS-6 height-finder radars were added. This configuration (a SAGE qualified long range search radar and two SAGE qualified height-finders) met the requirements for transition to SAGE System operation.

SAGE System Transition

The transition of the manual GCI system to the automated SAGE system began with the installation of the FST-2 coordinate data transmitter and search radar upgrades. The FST-2 equipment digitized the radar returns and transmitted the digital returns to the SAGE direction center. Under the SAGE System, interceptor aircraft were directed to their targets by the direction center computers and controllers, greatly reducing the need for local controllers and equipment at every radar station.

The FST-2 was a very large digital system using vacuum tube technology. Over 6900 vacuum tubes were used in each FST-2 requiring 21 air-conditioned cabinets, 40 tons of air conditioning, 43.5 kva of prime power and usually a large new addition to the operations building. The FST-2B modification added two more cabinets but with newer solid state (transistor) technology to process coded responses from aircraft transponders.

SAGE System Operation

Former Stewart SAGE Direction Center DC-02
Brunswick SAGE Direction Centers & Sectors
Assigned Direction Center Sector
15 Aug 1958 -1 Aug 1962 Topsham SAGE Direction Center DC-05 Bangor Air Defense Sector
1 Aug 1965 -1 Mar 1965 Stewart SAGE Direction Center DC-02 Boston Air Defense Sector

The site began operation as a SAGE site in 1959, initially feeding the Topsham SAGE Direction Center DC-05. On 1 Oct 1959 the squadron designation was changed from the 654th AC&W Squadron to 654th Radar Squadron (SAGE) indicating the new SAGE System role.

On 1 Aug 1962 control was transferred to Boston Air Defense Sector, Stewart SAGE Direction Center DC-02, where it remained until the site closed.

Newspaper accounts indicate that Brunswick Air Force Station was slated to receive one of the Frequency Diversity (FD) FPS-35 radar sets which would have required the construction of a five story tower. The tower was never built and the radar was not installed.


The Brunswick AFS radars were removed from service on 1 Mar 1965. The station and the 654th were deactivated on 25 Jun 1965. The R-25 GATR Site stayed in operation until about 1970.

Gap Fillers

Brunswick AFS was responsible for the maintenance of one remote unattended gap-filler radar site. The unattended gap filler sites were placed in locations where the main search radar lacked coverage. These sites were equipped with short range FPS-14 or FPS-18 search radars and FST-1 Coordinate Data transmitters that sent digitized radar target data to a SAGE direction center and to the main radar site. Both the radar set and the FST-1 were dual channel to increase site up time. Maintenance teams were dispatched for regularly scheduled maintenance or when fault indicators on the FSW-1 remote monitoring equipment suggested the site had problems. The FSW-1 also allowed remote operation of specific functions such as channel changes for the radar and for the FST-1, it also allowed remote operation of the diesel generators at the gap filler site. The Brunswick AFS gap-filler radar was located at Sedgwick, Maine. One additional gap-filler site was planned for Moultonboro, New Hampshire but the location was not confirmed and the site was never built.

Brunswick AFS Gap Filler Radar Sites (edit list)
ADC NORAD Location State Type From To GPS Notes
P-13A Z-13A Sedgwick ME FPS-14, FST-1 1957-09 1967-12 44.31406,
Building exists
Tower piers only

Brunswick AFS Major Equipment List
Search Radar HF Radar Data Systems Comm
Unit Designations
  • 654th Aircraft Control & Warning (AC&W) Squadron (1951-1959)
  • 654th Radar Squadron (SAGE) (1959-1965)
654th Assignments
  • 1 Jan 1951 - Assigned at Brunswick AFS, ME,assigned to the 540th AC&W Gp.
  • 8 Mar 1951 - Moved to Brunswick NAS, ME.
  • 6 Feb 1952 - Transferred from 540th AC&W Gp to 32nd AD.
  • 16 Feb 1953 - Transferred to the 4707th Def Wg.
  • 1 Mar 1956 - Transferred to the 32nd AD.
  • 15 Aug 1958 - Transferred to Bangor ADS. Topsham SAGE Direction Center DC-05
  • 1 Oct 1959 - Redesignated from AC&W Sq to 654th Radar Sq (SAGE).
  • 1 Aug 1962 - Transferred to Boston ADS. Stewart SAGE Direction Center DC-02
  • 25 Jun 1965 - Discontinued.

Current Status

Location: Former Brunswick NAS, Brunswick in Cumberland County, Maine.

Maps & Images

Lat: 43.89556 Long: -69.92333

See Also:


  • Cornett, Lloyd H. & Johnson, Mildred W., A Handbook of Aerospace Defense Organization (1946-1980), Office of History ADC, Peterson AFB, Colorado, 31 Dec 1980, 179 pages, Pdf, page 156-157.
  • Winkler, David F., Searching the skies: the legacy of the United States Cold War defense radar program, USAF Hq Air Combat Command, 1997, 192 pages, Pdf, page 119.


Visited: No

Personal tools