View source for Knox-class frigate

{{Short description|Class of Anti-Submarine Warfare frigates}}

{{Use dmy dates|date=July 2021}}

{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image=USS Robert E. Peary (FF-1073) San Francisco.jpg
|Ship caption=''Knox''-class frigate {{USS|Robert E. Peary|FF-1073}} and the skyline of [[San Francisco]] in the background
}}
{{Infobox ship class overview
|Builders=*[[Todd Shipyard]], Seattle and San Pedro
*[[Lockheed Shipbuilding and Construction Company]]
*[[Avondale Shipyard]]
|Operators=*{{naval|United States}}
*{{navy|Republic of China}}
*{{naval|Egypt}}
*{{navy|Greece}}
*{{naval|Mexico}}
*{{naval|Thailand}}
*{{naval|Turkey}}
|Class before={{sclass|Garcia|frigate|4}} / {{sclass|Brooke|frigate|4}}
|Class after={{sclass|Oliver Hazard Perry|frigate|4}}
|Subclasses=*{{sclass|Baleares|frigate|4}}
*{{sclass|Allende|frigate|4}}
*{{sclass|Phutthayotfa Chulalok|frigate|4}}
|Built range=1965–1974
|In commission range= 1969–1994 (USN)
|Total ships building=
|Total ships planned= 55
|Total ships completed= 46
|Total ships cancelled= 9<ref name="BaR p244">Bauer and Roberts 1991, pp. 244</ref>
|Total ships active=
|Total ships laid up=
|Total ships lost=
|Total ships retired= 46 (USN), some were transferred to other countries where they are in active service
|Total ships preserved= 2
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship type=* [[Ocean escort]] (1964–1975)
* [[Frigate]] (1975–1994)
|Ship displacement={{cvt|4065|LT|lk=on}} (full load)
|Ship length={{cvt|438|ft}}
|Ship beam={{cvt|46|ft|9|in}}
|Ship draught=
|Ship draft={{cvt|24|ft|9|in}}
|Ship power=* 2 × {{cvt|1200|psi}} boilers
* {{cvt|35000|shp}}
|Ship propulsion=* 1 × Westinghouse steam turbine
*1 × [[propeller|shaft]]
|Ship speed= {{cvt|27|kn}}
|Ship range= {{cvt|4500|nmi}} at {{cvt|20|kn}}
|Ship complement=17 officers, 240 enlisted
|Ship sensors=*[[AN/SPS-10]] Surface Search Radar
*[[AN/SPS-40]] Air Search Radar
*[[AN/SPS-67]] Surface Search Radar
*[[AN/SQS-26]] active/passive [[Sonar]]
*AN/SQR-18 [[Towed array sonar]] system
*[[AN/SPG-53]] Mk68 Gun Fire Control System
|Ship EW=*As Built [[AN/WLR-1C – AN/ULQ-6C and AN/SLA-15 (Comprising AN/SLQ-26 System)]]
*[[SLQ-32 Electronic Warfare Suite|AN/SLQ-32 Electronics Warfare System]] and [[Mark 36 SRBOC]]
|Ship armament={{Knox class frigate armament}}
|Ship armour=
|Ship armor=
|Ship aircraft=* 1 × [[Gyrodyne QH-50 DASH|QH-50]] (DASH) helicopter 
* 1 × [[SH-2 Seasprite]] (LAMPS I) helicopter (refit)
|Ship notes=
}}
|}

The 46 '''''Knox''-class frigates''' were the largest, last, and most numerous of the [[United States Navy|US Navy's]] second-generation [[anti-submarine warfare]] (ASW) escorts. Originally laid down as [[ocean escorts]] (formerly called [[destroyer escort]]s), they were all redesignated as [[frigate]]s on 30 June 1975, in the [[United States Navy 1975 ship reclassification|1975 ship reclassification plan]] and their hull designation changed from 'DE' to 'FF'. The ''Knox'' class was the Navy's last destroyer-type design with a [[steam turbine]] powerplant.

Due to their unequal comparison to [[destroyer]]s then in service (larger size with lower speed and only a single propeller and 5-inch gun), they became known to a generation of destroyermen as "McNamara's Folly."<ref>{{cite web|url=http://www.destroyerhistory.org/coldwar/knoxclass.html |title=Knox class |publisher=destroyerhistory.org. |access-date=3 November 2009 |url-status=dead |archive-url=https://web.archive.org/web/20090601185336/http://www.destroyerhistory.org/coldwar/knoxclass.html |archive-date= 1 June 2009 }}</ref>

These ships were retired from the US Navy at the end of the [[Cold War]] due to their relatively high running costs, a declining defense budget, and the need for ships with a more advanced anti-submarine capability. None of the ships served more than 23 years in the US Navy, and by 1994, all of the class had been retired, although some remain in service with foreign nations such as [[list of naval ships of Egypt|Egypt]], [[Taiwan]], [[Thailand]], and [[Mexico]].

==Design==
Designated SCB No. 199C, the ''Knox'' was planned as the follow-on to the twin [[5-inch/38-caliber gun|5" gun]]-armed [[Garcia class frigate]]s and the [[RIM-24 Tartar|Tartar]] missile-equipped {{Sclass|Brooke|frigate|1}}s. Their initial design incorporated the prior classes' pressure-fired boilers in a similar-sized hull designed around the massive bow-mounted [[AN/SQS-26]] sonar, with increased endurance and reduced crew size. Anti-submarine armament was to consist of [[RUR-5 ASROC]] [[Anti-submarine missile|anti submarine missiles]] together with the [[Gyrodyne QH-50 DASH|QH-50 DASH]] [[Unmanned aerial vehicle|drone]] [[helicopter]], while defensive armament was to be the [[MIM-46 Mauler|RIM-46 Sea Mauler]] short range [[Surface-to-air missile|anti-aircraft missile]] backed up by a single [[5"/54 caliber Mark 42 gun|5-inch/54 caliber Mark 42 gun]].<ref name="Fried p358-0">Friedman 1982, pp. 358–360.</ref>

[[File:Knox-class frigate drawing 1974.png|thumb|left|Drawing of a ''Knox''-class frigate as built.]]

The design soon ran into problems however, with the US Navy deciding to switch to conventional {{cvt|1200|psi}} boilers, requiring a redesign, and the ships became longer and heavier in order to accommodate the less compact power plants. Furthermore, Sea Mauler was cancelled in 1965, leaving the ships to complete without any anti-aircraft system except the 5" gun.<ref name="Fried p360">Friedman 1982, p. 360.</ref><ref name="conways47 p598-9" />

[[File:USS Fanning (FF-1076) overhead view.jpg|thumb|left|Overhead view of ''Knox''-class frigate {{USS|Fanning|FF-1076}}]]

The steam plant for these ships consists of two [[Combustion Engineering]] or [[Babcock & Wilcox]] [[Water-tube boiler#D-type Boiler|"D" type boilers]], each equipped with a high-pressure (supercharger) forced draught air supply system, with a plant working pressure of {{cvt|1200|psi}} and {{cvt|1000|°F}} superheat and rated at {{cvt|35000|shp}} driving a single [[propeller|screw]]. This gives them a speed of {{cvt|27|kn}}.<ref name="S&A12 p121"/><ref name="Combat Fleets 90 p807">Prézelin and Baker 1990, p.807.</ref>

The ships were designed primarily as [[anti-submarine warfare]] (ASW) platforms.<ref name="conways47 p598-9" /> Their main anti-submarine sensor was the large bow-mounted [[AN/SQS-26]]CX low-frequency scanning [[sonar]], operating as an active sonar at a frequency of about 3.5&nbsp;kHz and passively at 1.5–4&nbsp;kHz. The active modes of operation included direct path, to a range of about {{cvt|20000|yd}}, bottom bounce, and convergence zone, which could give ranges of up to about {{cvt|70000|yd}}, well outside the capability of ASROC, and requiring the use of a helicopter to exploit.<ref name="conways47 p598-9" /><ref name="WNS97 p629-0">Friedman 1997, pp. 629–630.</ref><ref name="conways47 p553">Gardiner and Chesneau 1995, p. 553.</ref> An eight-round ASROC launcher (with 16 missiles carried) was fitted between the gun turret and the bridge, backed up by four fixed {{cvt|12.75|in}} [[Mark 32 Surface Vessel Torpedo Tubes|Mark 32]] anti-submarine torpedo tubes. A flight deck and hangar for operating the DASH drone helicopter was fitted aft.<ref name="jfs71 p481"/><ref name="conways47 p598-9"/>

==Construction==
Ten ships were authorized in [[Fiscal Year]] 1964, sixteen in 1965, and ten each for FYs 1966, 67 and 68; six were canceled in 1968, and four more in 1969. While the FY64 and FY65 ships were ordered from four different shipyards, later ships (DE-1078 onwards) were all ordered from [[Avondale Shipyard]]s in order to cut costs.<ref name="Fried p360" /> These ships were built on a production line, with prefabricated modules being assembled upside down, welded together and then rotated into an upright position.<ref name="jfs71 p481">Blackman 1971, p. 481.</ref> They were originally commissioned as destroyer escorts (DEs) 1052–1097 in 1969–1974,<ref name="conways47 p598-9" /> but were redesignated as frigates (FF) on 30 June 1975.<ref name="S&A12 p113">Polmar 1981, p. 113.</ref>

The lead ship of the class, {{USS|Knox|FF-1052|3}}, was [[Keel laying|laid down]] 5 October 1965, and [[Ship commissioning|commissioned]] 12 April 1969, at the [[Vigor Shipyards|Todd Shipyards]] in [[Seattle]], Washington.<ref name="conways47 p598-9">Gardiner and Chumbley 1995, pp. 598–599.</ref>

==Modifications==
The {{USS|Joseph Hewes|FF-1078}} and subsequent ships of the class were modified to enable them to serve as flagships. The primary change was a slightly different arrangement of the "Officer's Country" staterooms with additional staterooms in a new 01 level structure which replaced the open deck between the boats. The stateroom on the port side under the bridge was designated as a "flag" stateroom, with additional staterooms for flag staff when serving as a flagship. These ships have been referred to as the ''Joseph Hewes''-sub-class {{citation needed|date=September 2018}}.

[[File:USS Bowen (FF-1079).jpg|thumb|left|Bow modifications including bulwark and horizontal spray strake on {{USS|Bowen|FF-1079}} in 1984.]]

The ''Knox'' class had been criticized for deck wetness and there were a number of instances of damage to the forward weapons mounts in heavy seas, so the class were refitted with "hurricane bows" beginning with {{USS|Bagley|FF-1069|3}} in 1979. The modification heightened the bow section, adding bulwarks and spray [[strake]]s to prevent burrowing into on-coming seas and to better protect the forecastle armament.<ref>{{cite book |url= https://books.google.com/books?id=Tzp58htKLkEC&pg=PA360 |last= Friedman |first= Norman |title= US Destroyers: An Illustrated Design History |publisher= Naval Institute Press |location= Annapolis |year= 2004 |page= 360 |isbn= 978-1-55750-442-5 |edition= Revised }}</ref>

[[File:USS McCandless (FF-1084).jpg|thumb|left|Aerial view of ''Knox''-class frigate {{USS|McCandless|FF-1084}}]]

Twenty-five ships of the class (DE-1052, 1056, 1063–1071 and 1078–1097) were refitted with the AN/SQS-35(V) Independent Variable Depth Sonar, an active sonar operating at about 13&nbsp;kHz.<ref name="conways47 p598-9" /><ref name="S&A12 p121">Polmar 1981, p. 121.</ref><ref name="Combat Fleets 90 p807"/> The IVDS' sonar transducers were packaged within a 2-ton fiberglass-enclosed "fish" containing the sonar array and a gyro-compass/sensor package launched by the massive 13V Hoist from a stern compartment, located just beneath the main deck, to depths of up to {{cvt|600|ft|m|-1}}. The IVDS could take advantage of water layer temperature conditions in close-range (less than {{cvt|20000|yd|round=5}}) submarine detection, tracking and fire-control.{{citation needed|date=May 2015}} The AN/SQS-35 "fish" was later modified to tow an AN/SQR-18A TACTASS passive towed array sonar.<ref name="Combat Fleets 90 p808">Prézelin and Baker 1990, p.808.</ref><ref name="jfs85 p718">Moore 1985, p. 718.</ref> The DASH drone proved unreliable, and following its withdrawal in 1973, the ships' helicopter facilities were expanded to accommodate the larger, manned, [[Kaman SH-2 Seasprite|Kaman Seasprite]] [[Light Airborne Multi-Purpose System|LAMPS 1]] helicopter.<ref name="jfs85 p717">Moore 1985, p. 717.</ref>

Thirty-one ships (DE-1052–1069 and 1071–1083) were fitted with an eight-round Basic Point Defence Missile System (BPDMS) launcher for [[RIM-7 Sea Sparrow]] missiles in place of the cancelled [[MIM-46 Mauler|Sea Mauler]] short range surface to air missile system, while {{USS|Downes|FF-1070|3}} was fitted with a NATO Sea Sparrow (IBPDMS) launcher. It was planned to equip the other 14 ships with [[MIM-72 Chaparral|Sea Chaparral]], based on the [[AIM-9 Sidewinder|Sidewinder]] air-to-air missile, but this plan was abandoned.<ref name="Fried p361">Friedman 1982, p. 361.</ref> Most ships were refitted with a {{cvt|20|mm}} [[Phalanx CIWS]] aft during the 1980s, replacing the Sea Sparrow launcher.<ref name="Combat Fleets 90 p808"/>

In the 1970s, several ships received an interim [[surface warfare]] upgrade allowing [[AGM-78 Standard ARM|Standard ARM]] anti-radar missiles to be fired from the ships' ASROC launcher.<ref name="Fried p361"/> Later, all ships were modified to launch [[Harpoon (missile)|Harpoon]] anti-ship missiles from the ASROC launcher, which could carry two Harpoons, with two more carried in the ships' ASROC magazine.<ref name="Combat Fleets 90 p808"/>

== ''Baleares'' class ==
Five modified ships were built in Spain for the [[Spanish Navy]] as the [[Baleares-class frigate|Baleares-class]]. In these ships, the Sea Sparrow launcher and helicopter facilities were replaced by a Mk 22 launcher for sixteen [[RIM-66 Standard|Standard]] surface-to-air missiles, giving them a limited area air-defence capability.

== ''Chi Yang'' class ==
[[File:ROCN Yi Yang (FFG-939) in Keelung Port Pushing by Tugboat YTL49 20140327.jpg|thumb|right|''Chi Yang class'' ROCN Yi Yang (FFG-939)]]
[[File:Keelung Taiwan Ship-ROCN-Lan-Yang-01.jpg|thumb|right|''Chi Yang class'' ROCN Lan Yang (FFG-935)]]
[[File:Midship of ROCN Yi Yang (FFG-939) 20140327.jpg|thumb|right|''Chi Yang class'' ROCN Yi Yang (FFG-939) has 10 SM-1 missiles installed in two forward twin box launchers on top of the helicopter hangar, and two triple box launchers installed between the stack and the hangar.]]
[[File:ROCN Ning Yang (FFG-938) Shipped in Keelung Port Left Rear View 20131227.jpg|thumb|right|''Chi Yang class'' ROCN Ning Yang (FFG-938)Port Left Rear View.]]

In the 1990s, the US agreed to transfer eight ''Knox''-class frigates to the [[Republic of China Navy]] (ROCN). The ROCN, anticipating future difficulties in maintaining the steam plants on these ships, originally contemplated an ambitious plan to replace these plants with diesel engines. However, due to budget considerations and the acquisition of newer ships, this plan is now believed to have been shelved. These frigates were renamed the ''Chi Yang''-class and assigned to the ROCN 168 Patrol Squadron.<ref>{{cite web|publisher=GlobalSecurity.org. |url=http://www.globalsecurity.org/military/world/taiwan/chi-yang.htm |title=Chi Yang-class [Knox] Frigate |date=11 July 2011 |access-date=7 October 2014}}</ref>

By 2005, the ROCN had removed several systems from the retired {{sclass|Gearing|destroyer|4}} upgraded [[World War II]]-vintage destroyers and transferred them to seven of the ''Chi Yang'' class. These systems include SM-1MR [[Standard missile]] in box launchers, H-930 modular combat system, DA-08/2 air/surface search radar, and [[STIR (radar)|STIR-180 illuminating radar]]. Each ''Chi Yang''-class frigate has 10 SM-1 missiles installed in two forward twin box launchers on top of the helicopter hangar, and two triple box launchers installed between the stack and the hangar, pointing to port and starboard.<ref>{{Cite web |url=http://www1.apan-info.net/Portals/45/VIC_Products/2007/04/070402-P-Taiwan.doc |title=070402-P-Taiwan |access-date=3 July 2007 |archive-url=https://web.archive.org/web/20070927194545/http://www1.apan-info.net/Portals/45/VIC_Products/2007/04/070402-P-Taiwan.doc |archive-date=27 September 2007 |url-status=dead }}</ref> ''Chi Yang'' (FFG-932) did not receive the upgrade.

The ASW capability of the ''Chi Yang'' class is provided by its SQS-26 bow-mounted sonar, SQS-35(v) VDS, SQR-18(v)1 passive TAS, MD500 ASW helicopter, Mk-16 8-cell [[Harpoon (missile)|Harpoon]]/[[RUR-5 ASROC]] box launcher, and four Mk46 {{cvt|324|mm}} torpedoes. While on ASW patrol, the frigate will carry two Harpoon SSMs and six ASROCs in its Mk-16 box launcher.<ref>Emerald Designs. [http://www.emeraldesigns.com/matchup/destroyer.htm Destroyer] {{webarchive |url=https://web.archive.org/web/20070608145222/http://www.emeraldesigns.com/matchup/destroyer.htm |date=8 June 2007 }}</ref>

There are some speculations that these ships will probably be upgraded with [[Hsiung Feng III]] missiles.<ref>{{cite web|url=http://www.globalsecurity.org/wmd/library/news/taiwan/2013/taiwan-130216-cna01.htm |title=Taiwan to expand missile deployment to counter China's navy |publisher=GlobalSecurity.org |date=16 February 2013 |access-date=7 October 2014}}</ref>

Regarding to the outdated battle system onboard and the ageing ships, the class is expected to be replaced by the newly built [[Republic_of_China_Navy#Future_Light_Frigates|Taiwanese Light Frigate]]. <ref>{{cite web|url = https://www.taiwannews.com.tw/en/news/4702385 |title = Taiwan to begin constructing new light frigates next year|publisher=TaiwanNews.com | date = 30 October 2022|access-date= 27 December 2022 }} </ref>

== Ships in class==

{| class="sortable wikitable"
|-
!Ship Name
!Hull No.
!Builder
!Commission–<br />Decommission
!Fate
!Link
|-
|{{USS|Knox|FF-1052|2}}||FF-1052||[[Vigor Shipyards|Todd]], Seattle||1969–1992||Sunk as target||[http://www.navsource.org/archives/06/06021052.htm]
|-
|[[USS Roark (FF-1053)|''Roark'']]||FF-1053||Todd, Seattle||1969–1991||Scrapped||[http://www.navsource.org/archives/06/06021053.htm]
|-
|[[USS Gray (FF-1054)|''Gray'']]||FF-1054||Todd, Seattle||1970–1991||Scrapped||[http://www.navsource.org/archives/06/06021054.htm]
|-
|[[USS Hepburn (FF-1055)|''Hepburn'']]||FF-1055||[[Todd Pacific Shipyards, Los Angeles Division|Todd, San Pedro]]||1969–1991||Sunk as target||[http://www.navsource.org/archives/06/06021055.htm]
|-
|[[USS Connole (FF-1056)|''Connole'']]||FF-1056||[[Avondale Shipyard|Avondale]]||1969–1992||To Greece, renamed ''Ipirus'' (F-456) Sunk as target||[http://www.navsource.org/archives/06/06021056.htm]
|-
|[[USS Rathburne (FF-1057)|''Rathburne'']]||FF-1057||[[Lockheed Shipbuilding and Construction Company|Lockheed]]||1970–1992||Sunk as target||[http://www.navsource.org/archives/06/06021057.htm]
|-
|[[USS Meyerkord (FF-1058)|''Meyerkord'']]||FF-1058||Todd, San Pedro||1969–1991||Scrapped||[http://www.navsource.org/archives/06/06021058.htm]
|-
|[[USS W. S. Sims (FF-1059)|''W. S. Sims'']]||FF-1059||Avondale||1970–1991||Grant aid to Turkey as spare parts hulk||[http://www.navsource.org/archives/06/06021059.htm]
|-
|[[USS Lang (FF-1060)|''Lang'']]||FF-1060||Todd, San Pedro||1970–1991||Scrapped||[http://www.navsource.org/archives/06/06021060.htm]
|-
|[[USS Patterson (FF-1061)|''Patterson'']]||FF-1061||Avondale||1970–1991||Scrapped||[http://www.navsource.org/archives/06/06021061.htm]
|-
|[[USS Whipple (FF-1062)|''Whipple'']]||FF-1062||Todd, Seattle||1970–1992||To Mexico, renamed ''Almirante Francisco Javier Mina'' (F-214)||[http://www.navsource.org/archives/06/06021062.htm]
|-
|[[USS Reasoner (FF-1063)|''Reasoner'']]||FF-1063||Lockheed||1971–1993||To Turkey, renamed ''Kocatepe'' (F-252). Sunk as target in 2005||[http://www.navsource.org/archives/06/06021063.htm]
|-
|[[USS Lockwood (FF-1064)|''Lockwood'']]||FF-1064||Todd, Seattle||1970–1993||Scrapped||[http://www.navsource.org/archives/06/06021064.htm]
|-
|[[USS Stein (FF-1065)|''Stein'']]||FF-1065||Lockheed||1972–1992||To Mexico, renamed ''Ignacio Allende'' (F-211)||[http://www.navsource.org/archives/06/06021065.htm]
|-
|[[USS Marvin Shields (FF-1066)|''Marvin Shields'']]||FF-1066||Todd, Seattle||1971–1992||To Mexico, renamed ''[[Mariano Abasolo]]'' (F-212)||[http://www.navsource.org/archives/06/06021066.htm]
|-
|[[USS Francis Hammond (FF-1067)|''Francis Hammond'']]||FF-1067||Todd, San Pedro||1971–1992||Scrapped||[http://www.navsource.org/archives/06/06021067.htm]
|-
|[[USS Vreeland (FF-1068)|''Vreeland'']]||FF-1068||Avondale||1970–1992||To Greece, renamed ''Makedonia'' (F-458) Decommissioned||[http://www.navsource.org/archives/06/06021068.htm]
|-
|[[USS Bagley (FF-1069)|''Bagley'']]||FF-1069||Lockheed||1972–1991||Scrapped||[http://www.navsource.org/archives/06/06021069.htm]
|-
|[[USS Downes (FF-1070)|''Downes'']]||FF-1070||Todd, Seattle||1971–1992||Sunk as target||[http://www.navsource.org/archives/06/06021070.htm]
|-
|[[USS Badger (FF-1071)|''Badger'']]||FF-1071||Todd, San Pedro||1970–1991||Sunk as target||[http://www.navsource.org/archives/06/06021071.htm]
|-
|[[USS Blakely (FF-1072)|''Blakely'']]||FF-1072||Avondale||1970–1991||Scrapped||[http://www.navsource.org/archives/06/06021072.htm]
|-
|[[USS Robert E. Peary (FF-1073)|''Robert E. Peary'']]||FF-1073||Lockheed||1972–1992||To Taiwan, renamed ''Chih Yang'' (FF-932) Sunk as target 2020||[http://www.navsource.org/archives/06/06021073.htm]
|-
|[[USS Harold E. Holt (FF-1074)|''Harold E. Holt'']]||FF-1074||Todd, San Pedro||1971–1992||Sunk as target||[http://www.navsource.org/archives/06/06021074.htm]
|-
|[[USS Trippe (FF-1075)|''Trippe'']]||FF-1075||Avondale||1970–1992||To Greece, renamed ''Thraki'' (F-457) sunk as target||[http://www.navsource.org/archives/06/06021075.htm]
|-
|[[USS Fanning (FF-1076)|''Fanning'']]||FF-1076||Todd, San Pedro||1971–1993||To Turkey, renamed ''Adatepe'' (F-251)||[http://www.navsource.org/archives/06/06021076.htm]
|-
|[[USS Ouellet (FF-1077)|''Ouellet'']]||FF-1077||Avondale||1970–1993||To Thailand, renamed {{ship|HTMS|Phutthaloetla Naphalai||6}}
||[http://www.navsource.org/archives/06/06021077.htm]
|-
|[[USS Joseph Hewes (FF-1078)|''Joseph Hewes'']]||FF-1078||Avondale||1971–1994||To Taiwan, renamed ''Lan Yang'' (FF-935)||[http://www.navsource.org/archives/06/06021078.htm]
|-
|[[USS Bowen (FF-1079)|''Bowen'']]||FF-1079||Avondale||1971–1994||To Turkey, renamed ''Akdeniz'' (F-257)||[http://www.navsource.org/archives/06/06021079.htm]
|-
|[[USS Paul (FF-1080)|''Paul'']]||FF-1080||Avondale||1971–1992||To Turkey as spare parts hulk||[http://www.navsource.org/archives/06/06021080.htm]
|-
|[[USS Aylwin (FF-1081)|''Aylwin'']]||FF-1081||Avondale||1971–1992||To Taiwan, renamed ''Ning Yang'' (FF-938)||[http://www.navsource.org/archives/06/06021081.htm]
|-
|[[USS Elmer Montgomery (FF-1082)|''Elmer Montgomery'']]||FF-1082||Avondale||1971–1993||To Turkey as spare parts hulk||[http://www.navsource.org/archives/06/06021082.htm]
|-
|[[USS Cook (FF-1083)|''Cook'']]||FF-1083||Avondale||1971–1992||To Taiwan, renamed ''Hae Yang'' (FF-936) sunk as target||[http://www.navsource.org/archives/06/06021083.htm]
|-
|[[USS McCandless (FF-1084)|''McCandless'']]||FF-1084||Avondale||1972–1994||To Turkey, renamed ''Trakya'' (F-257)||[http://www.navsource.org/archives/06/06021084.htm]
|-
|[[USS Donald B. Beary (FF-1085)|''Donald B. Beary'']]||FF-1085||Avondale||1972–1994||To Turkey, renamed ''Karadeniz'' (F-255)||[http://www.navsource.org/archives/06/06021085.htm]
|-
|[[USS Brewton (FF-1086)|''Brewton'']]||FF-1086||Avondale||1972–1992||To Taiwan, renamed ''Fong Yang'' (FF-933)||[http://www.navsource.org/archives/06/06021086.htm]
|-
|[[USS Kirk (FF-1087)|''Kirk'']]||FF-1087||Avondale||1972–1993||To Taiwan, renamed ''Fen Yang ''(FF-934)||[http://www.navsource.org/archives/06/06021087.htm]
|-
|[[USS Barbey (FF-1088)|''Barbey'']]||FF-1088||Avondale||1972–1992||To Taiwan, renamed ''Hwai Yang'' (FF-937)||[http://www.navsource.org/archives/06/06021088.htm]
|-
|[[USS Jesse L. Brown (FF-1089)|''Jesse L. Brown'']]||FF-1089||Avondale||1973–1994||To Egypt, renamed ''Dumyat'' (F961)||[http://www.navsource.org/archives/06/06021089.htm]
|-
|[[USS Ainsworth (FF-1090)|''Ainsworth'']]||FF-1090||Avondale||1973–1994||To Turkey, renamed ''Ege'' (F-256)||[http://www.navsource.org/archives/06/06021090.htm]
|-
|[[USS Miller (FF-1091)|''Miller'']]||FF-1091||Avondale||1973–1991||To Turkey as spare parts hulk||[http://www.navsource.org/archives/06/06021091.htm]
|-
|[[USS Thomas C. Hart (FF-1092)|''Thomas C. Hart'']]||FF-1092||Avondale||1973–1993||To Turkey, renamed ''Zafer'' (F-253)||[http://www.navsource.org/archives/06/06021092.htm]
|-
|[[USS Capodanno (FF-1093)|''Capodanno'']]||FF-1093||Avondale||1973–1993||To Turkey, renamed ''Muavenet'' (F-250)||[http://www.navsource.org/archives/06/06021093.htm]
|-
|[[USS Pharris (FF-1094)|''Pharris'']]||FF-1094||Avondale||1974–1992||To Mexico, renamed ARM ''Guadalupe Victoria'' (F-213)||[http://www.navsource.org/archives/06/06021094.htm]
|-
|[[USS Truett (FF-1095)|''Truett'']]||FF-1095||Avondale||1974–1994||To Thailand, renamed {{ship|HTMS|Phutthayotfa Chulalok||6}}||[http://www.navsource.org/archives/06/06021095.htm]
|-
|[[USS Valdez (FF-1096)|''Valdez'']]||FF-1096||Avondale||1974–1991||To Taiwan, renamed ''Yi Yang'' (FF-939)||[http://www.navsource.org/archives/06/06021096.htm]
|-
|[[USS Moinester (FF-1097)|''Moinester'']]||FF-1097||Avondale||1974–1994||To Egypt, renamed ''Rasheed'' (F.962)||[http://www.navsource.org/archives/06/06021097.htm]
|-
| rowspan="2" |Unnamed||DE-1098 through DE-1100<ref>These ships are noted with the original 'DE' hull code as they were cancelled prior to the 1975 ship reclassification plan.</ref>|| rowspan="2" {{n/a}}
| rowspan="2" {{n/a}}|| rowspan="2" |Cancelled 24 February 1969<ref name="BaR p244" /><br><small>(DE-1101 was to be an experimental ship)</small>|| rowspan="2" |[http://www.alternatewars.com/BBOW/Warships/USN_DE_Lineage_CW_Modern.htm] {{Webarchive|url=https://web.archive.org/web/20180622185902/http://www.alternatewars.com/BBOW/Warships/USN_DE_Lineage_CW_Modern.htm |date=22 June 2018 }}
|-
|DE-1102 through DE-1107
|}

==See also==
* [[List of naval ship classes in service]]

== References ==
=== Citations ===
{{reflist|30em}}

=== References ===
*{{cite book | last = Bauer | first = K. Jack | author-link = K. Jack Bauer | author2=Roberts, Stephen S. | title = Register of Ships of the U.S. Navy, 1775-1990: Major Combatants | publisher = Greenwood Press | year = 1991 | location = [[Westport, Connecticut]] | isbn = 0-313-26202-0 }}
*Blackman, Raymond V. B. (ed.) ''Jane's Fighting Ships 1971–72''. London: Sampson Low, Marston & Co., Ltd., 1971. {{ISBN|0-354-00096-9}}.
*Friedman, Norman. ''The Naval Institute Guide to World Naval Weapon Systems 1997–1998''. Annapolis, Maryland, USA: Naval Institute Press, 1997. {{ISBN|1-55750-268-4}}.
*Friedman, Norman. ''U.S. Destroyers: An Illustrated Design History''. Annapolis, Maryland, USA: Naval Institute Press, 1982. {{ISBN|0-87021-733-X}}.
*Gardiner, Robert and Stephen Chumbley (eds.) ''Conway's All The World's Fighting Ships 1947–1995''. Annapolis, Maryland, USA: Naval Institute Press, 1995. {{ISBN|1-55750-132-7}}.
*Moore, John. (ed.) ''Jane's Fighting Ships 1985–86''. London: Jane's Yearbooks, 1985. {{ISBN|0-7106-0814-4}}.
*Polmar, Norman. ''The Ships and Aircraft of the U.S. Fleet''. Twelfth Edition. London: Arms and Armour Press, 1981. {{ISBN|0-85368-397-2}}.
*Prézelin, Bernard and A.D. Baker III (editors). ''The Naval Institute Guide to Combat Fleets of the World 1990/91:Their Ships, Aircraft and Armament''. Annapolis, Maryland, USA: Naval Institute Press, 1990. {{ISBN|0-87021-250-8}}.

== External links ==
{{Commons category|Knox class frigates}}
*{{cite web|url=http://destroyerhistory.org/coldwar/knoxclass/ |title=Knox Class Frigate |website=Destroyer History Foundation |url-status=dead |archive-url=https://web.archive.org/web/20110725231704/http://destroyerhistory.org/coldwar/knoxclass/ |archive-date=25 July 2011 }}
*{{cite web |url= http://www.globalsecurity.org/military/systems/ship/ff-1052.htm |title= Knox Class Frigate |website= Global Security }}
*{{cite web |url= http://www.fas.org/man/dod-101/sys/ship/ff-1052.htm |title= Knox Class Frigate |website= Federation of American Scientists }}
*{{cite web |url= https://www.kcfpa.org/ |title= Knox Class Frigate Preservation Association |website= kcfpa.org |access-date= 12 May 2015 |archive-date= 20 March 2015 |archive-url= https://web.archive.org/web/20150320140916/https://www.kcfpa.org/ |url-status= dead }}

{{Knox class frigate}}

{{DEFAULTSORT:Knox Class Frigate}}
[[Category:Frigate classes]]
[[Category:Knox-class frigates| ]]
[[Category:Cold War frigates and destroyer escorts of the United States| Knox]]
[[Category:Vietnam War frigates and destroyer escorts of the United States| Knox]]