689th Radar Squadron

689th Radar Squadron
Emblem of the 689th Radar Squadron
Active	1957-1979
Country	United States
Branch	United States Air Force
Type	General Radar Surveillance

The 689th Radar Squadron is an inactive United States Air Force unit. It was last assigned to the 25th Air Division, stationed at Mount Hebo Air Force Station, Oregon. It was inactivated on 30 June 1979.

History

The 689th Radar Squadron's long range radars (LRRs) were part of the Air Force Semi-Automatic Ground Environment (SAGE) computer directed system for air defense. Available Squadron electronic equipment was able to support the detection, identification, and destruction of enemy aircraft. This was accomplished by communications between the SAGE computer at McChord AFB, the radars and communications systems at Mt. Hebo, and airborne fighter-interceptor aircraft such as the supersonic F-106 Delta Dart jet.

Radar systems operated and maintained by the 689th included the FPS-24 search radar and the FPS-26A and FPS-90 height finder radar. The FPS-24 was housed in a 5 story tall (85 ft) building with two separate transmitters, a receiver, and special receiver equipment to provide counter measures against enemy jamming. In addition, the radar antenna was housed beneath a rigid radome about 145 ft in diameter and 100 ft tall. Three separate radomes were installed in the period from 1962 to 1965. All three were destroyed by high winds, the last in 1968. As a result the FPS-24 was removed and a FPS-27 search radar requiring a much smaller radome was installed. Both height finder radar antennas were protected by smaller, inflatable radomes. Each height finder radar was installed in its own building. The FPS-26A radar was later modified beginning in 1967 to an FSS-7 Sea Launched Ballastic Missile (SLBM) detector. All three radar buildings were connected together so that 689th personnel could walk between them and the Operations building and be protected from adverse weather conditions.

The 689th Radar Squadron was originally assigned to the SAGE Portland Air Defense Sector (PoADS) at Adair Air Force Station, Oregon, a part of the 25th Air Division SAGE at McChord AFB, Washington. Higher headquarters included 4th Air Force (Hamilton AFB, California), and Air Defense Command (Peterson AFB, Colorado). As the northernmost LRR site in PoADS, the 689th was also able to feed its radar data to the Seattle Air Defense Sector (SeADS), another adjacent unit of the 25th Air Division. When the PoADS and SeADS were absorbed into the 25th ADiv, the radars of the 689th and related units were connected to the computers there. In July 1967, Detachment 2 of the 14th Missile Warning Squadron was activated at Mt Hebo AFS to operate a missile warning radar.^[1] Both Squadrons are now inactivated. The Air Force equipment and facilities at Mt Hebo have been removed and the site returned to its natural state. A plaque is virtually all that remains of the radar station. It is dedicated In Memory Of Those Who Served At Mt. Hebo AFS, Oregon. 689th Radar Sq., Oct.1956-June 1979. Det.2 14th MWS July 1967 - Sep.1980.

Squadron responsibilities included operation and maintenance of the installed radar and communications equipment, and various support activities including food service, supply, power production, civil engineering, administration, transportation, and personnel services. Available facilities included buildings for the radar and communications equipment, barracks for personnel, family housing, a power plant, dining hall, gym, motor pool, and administrative activities. The Squadron had all the functions and capabilities of a small town.

Lineage

Established as 689th Aircraft Control and Warning Squadron

Activated on 1 October 1953

Redesignated as 689th Radar Squadron (SAGE) on 15 July 1960

Redesignated as 689th Radar Squadron on 1 February 1974

Inactivated on 30 June 1979

Assignments

4704th Defense Wing, 1 October 1953
25th Air Division, 8 October 1954
Portland Air Defense Sector, 1 March 1960
25th Air Division, 1 April 1966 – 30 June 1979

Stations

Portland AFB (later Portland International Airport), Oregon, 1 October 1953
Mount Hebo AFS, Oregon, 1 July 1956 – 30 June 1979

References

This article incorporates public domain material from the Air Force Historical Research Agency website http://www.afhra.af.mil/.

↑ Strategic Communications: Alternative Approaches for Modernization. Congressional Budget Office. October 1981, Page 10 Table 1.

Cornett, Lloyd H. and Johnson, Mildred W., A Handbook of Aerospace Defense Organization 1946 - 1980, Office of History, Aerospace Defense Center, Peterson AFB, CO (1980).
Winkler, David F. & Webster, Julie L., Searching the Skies, The Legacy of the United States Cold War Defense Radar Program, US Army Construction Engineering Research Laboratories, Champaign, IL (1997).

External links

Aerospace Defense Command (ADC)

Bases

CONUS	Amarillo Beale Charleston Davis-Monthan Dobbins Dover Dow Duluth Eglin Edwards Ellington Ellsworth England Ent Ethan Allen Fairfax Fallon Fort Heath Fort Lee Geiger George Glasgow Grand Forks Grenier Griffiss Gunter Hamilton Hancock Homestead Hurlburt Hunter Imeson Key West Kincheloe Kingsley Kirtland Lackland Laredo Larson Luke MacDill March Malmstrom McCoy McChord McClellan McGhee Tyson McGuire Minneapolis-St. Paul Minot Mitchel New Castle Niagara Falls Norton O'Hare Otis Oxnard Paine Perrin Peterson Pittsburgh Portland Presque Isle R.I. Bong Richards-Gebaur Robins K.I. Sawyer Selfridge Seymour Johnson Sioux City Stead Stewart Suffolk County Tinker Travis Truax Tyndall Vandenburg Vincent Walker Webb Westover Wright-Patterson Wurtsmith Youngstown

Overseas	Ernest Harmon Frobisher Bay Goose Bay Keflavik McAndrew Pepperrell Thule

Stations

CONUS	Adair Aiken Almaden Alpena Antigo Arlington Heights Baker Bedford Bellefontaine Belleville Benton Blaine Brookfield Brunswick Bucks Harbor Burns Calumet Cambria Cape Charles Cape Cod Carmi Caswell Chandler Charleston Cheyenne Mountain Claysburg Clear Colville Condon Continental Divide Cottonwood Cross City Crystal Springs Curlew Custer Cut Bank Dallas Center Dauphin Island Dickinson Duncanville Eldorado Empire Finland Finley Flintstone Fordland Fort Fisher Fort Lee Fortuna Gettysburg Grand Marais Grand Rapids Guthrie Hanna City Havre Highlands Houma Hutchinson Joelton Keno Killeen Kingman Kirksville Klamath Lake Charles Lake City Las Cruces Las Vegas Lewistown Lockport Lufkin Lyndonville Madera Makah Mica Peak Miles City Mill Valley Minot Montauk Moriarty Mount Hebo Mount Laguna Mount Lemmon Naselle North Bend North Charleston North Truro Oklahoma City Olathe Omaha Opheim Osceola Othello Owingsville Ozona Palermo Point Arena Port Austin Port Isabel Pyote Red Bluff Rochester Rockport Rockville (Indiana) Roslyn Rye Saint Albans San Clemente Island Santa Rosa Island Saratoga Springs Sault Ste Marie Shemya Snelling Snow Mountain Sweetwater Texarkana Tierra Amarilla Thomasville Tonopah Topsham Two Creeks Wadena Walnut Ridge Watertown Waverly West Mesa Willow Run Winnemucca Winslow Winston-Salem Woomera Yaak Zapata

Overseas	Armstrong Baldy Hughes Beausejour Cape Makkovik Cartwright Cut Throat Island Elliston Ridge Fox Harbour Hofn Hopedale Kamloops La Scie Langanes Latrar Melville Puntzi Mountain Ramore Red Cliff Rockville Saglek St. Anthony Saskatoon Mountain Sioux Lookout Spotted Island Stephenville

Air
Defense
units

Forces	Central Air Defense Eastern Air Defense Iceland Western Air Defense First Fourth Tenth Fourteenth

Air Divisions	8th 9th 20th 21st 23d 24th 25th 26th 27th 28th 29th 30th 31st 32d 33d 34th 35th 36th 37th 58th 64th 73d 85th

Sectors	Albuquerque Bangor Boston Chicago Detroit Duluth Goose Grand Forks Great Falls Kansas City Los Angeles Minot Montgomery New York Oklahoma City Phoenix Portland Reno Sault Sainte Marie San Francisco Seattle Sioux City Spokane Stewart Syracuse Washington

Wings	Fighter 1st 4th 23d 32d 33d 50th 52d 56th 78th 81st 325th 328th 507th Detection and Control 71st 73d 551st 552d Air Defense 46th 4620th 4621st 4622d 4624th 4625th 4627th 4628th 4683d 4700th 4702d 4703d 4704th 4705th 4706th 4707th 4708th 4709th 4710th 4711th 4750th 4751st 4752d 4756th 4780th

Groups	Fighter 1st 4th 14th 15th 23d 32d 33d 50th 52d 53d 54th 56th 57th 78th 79th 81st 82d 84th 325th 326th 327th 328th 329th 337th 343d 355th 408th 412th 414th 473d 475th 476th 478th 507th Air Defense 10th 500th 501st 502d 503d 514th 515th 516th 517th 518th 519th 520th 521st 525th 527th 528th 529th 530th 533d 534th 564th 566th 567th 568th 575th 637th 665th 678th 692d 701st 751st 762d 765th 778th 780th 827th 858th 4606th 4620th 4676th 4700th 4721st 4722d 4727th 4728th 4729th 4730th 4731st 4732d 4733d 4734th 4735th 4750th 4756th Aircraft Control & Warning 503d 505th 540th 541st 542d 543d 544th 545th 546th 563d 564th 565th 566th

Squadrons	Aerospace Defense Command Fighter Squadrons Aircraft Control and Warning Squadrons

Major
weapon
systems

Electronic	TB-29 EB-57 EC-121

Fighters	Propellor: F-47 F-51 P-61 F-82 Subsonic Jet: P-80 F-84 F-86 F-89 F-94 Supersonic Jet: F-101 F-102 F-104 F-106

Missiles	AIM-4 AIM-26 AIR-2 CIM-10

Ships	Guardian Interceptor Interdictor Interpreter Investigator Locator Lookout Outpost Pickett Protector Scanner Searcher Skywatcher Tracer Watchman Vigil

Texas Towers	Texas Tower 2 Texas Tower 3 Texas Tower 4

Miscellaneous

Air Defense Command Emblem Gallery (on Wikimedia Commons)
General Surveillance Radar Stations

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