Editing Knox-class frigate (section)

== ''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 aging 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>