Yoon Youngha-class patrol vessel

The Yoon Youngha-class patrol vessel (Hangul: 윤영하급 미사일고속함) also known as PKG-class patrol vessel is a class of patrol ship of the Republic of Korea Navy. One variant is in active service and a smaller variant is planned. The first being the PKX-A or Yun Youngha-class missile patrol ship (Hangul: 윤영하급 고속함), and the second the PKX-B class patrol boat (also known as Chamsuri-211-class patrol boat or Gumdoksuri-class patrol vessel).

ROKS Hyun Sihak
Class overview
NameYoon Youngha class
BuildersHanjin Heavy Industries, STX
Operators Republic of Korea Navy
Preceded byChamsuri class
Subclasses
  • PKX-A(PKG) (Yoon Youngha class)
  • PKX-B(PKMR)
Cost
  • ₩48.8 billion[1]
  • $37.7 million (constant 2009 USD)
In commission2008–present
PlannedPKX-A(PKG): 18, PKX-B(PKMR): 16
CompletedPKX-A(PKG): 18, PKX-B(PKMR): 16
ActivePKX-A(PKG): 18, PKX-B(PKMR): 12
General characteristics (PKX-A(PKG))
TypePatrol boat
Displacement570 tonnes (561 long tons)
Length63 m (206 ft 8 in)
Beam9 m (29 ft 6 in)
Draft3 m (9 ft 10 in)
Propulsion
Speed44 knots (81 km/h; 51 mph)
Range1,998 nmi (3,700 km) at 15 kn (28 km/h; 17 mph)
Complement40
Sensors and
processing systems
Electronic warfare
& decoys
  • 2 × T.S Tech K-RBOC Mk36 chaff/flare dispenser
  • LIG Nex1 Sonata SLQ-200(V)K ECM/ECCM suite
Armament
  • Hyundai Wia (after 3rd ship) 76 mm gun
  • S&T Dynamics 'No Bong' 40L/70K dual 40 mm gun
  • 4 × LIG Nex1 SSM-700K Hae Sung anti-ship cruise missile
  • 2 × S&T Dynamics K6 12.7 mm machine guns
General characteristics (PKX-B(PKMR))
TypePatrol boat
Displacement200 tonnes (197 long tons)
Length44 m (144 ft 4 in)
Beam7 m (23 ft 0 in)
PropulsionCODAG
Speed40 knots (74 km/h; 46 mph)
Sensors and
processing systems
  • STX RadarSys SPS-100K surface search radar
  • LIG Nex1 SPS-540K 3D surveillance radar
  • Saab CEROS 200 Fire Control Radar and optronic sight
  • Hanwha systems electro-optical targeting system
Electronic warfare
& decoys		LIG Nex1 Sonata SLQ-200(V)K ECM/ECCM suite
Armament
  • Hyundai Wia 76 mm gun
  • 2 × S&T Dynamics K6 12.7 mm machine guns
  • 12 launcher 130 mm guided rocket

Development

The Republic of Korea Navy (ROKN) began development of the PKG class in 2003 after a Chamsuri-class (PKM-class) patrol boat was sunk during a naval clash with North Korean patrol boats on June 29, 2002. The codenamed PKX (Patrol Killer eXperimental) program is the patrol boat modernization project of the ROKN.

The PKX consist of two main designs. The larger, missile armed PKX-A(PKG) of approximately 500 tons and the smaller gun armed PKX-B(PKMR) of approximately 200 tons. PKX-A(PKG) is planned to take up some of the operations done by Pohang-class corvettes, and the PKX-B(PKMR) is planned to replace the aging Chamsuri-class fleet.

The first PKX-A(PKG) vessels were ordered from Hanjin Heavy Industries. The lead ship of the class, Yoon Youngha, named after Lieutenant Commander Yoon Youngha who was killed during the second battle of Yeonpyeong, was launched on June 28, 2007[5] and commissioned on December 17, 2008.[6] The production of the PKX-A(PKG) are being divided between Hanjin Heavy Industries and STX in lots of four.

The PKX-B variant includes a 130 mm guided rocket launcher at the stern. The first vessel was launched in July 2016 and was commissioned in late 2017; all four ships in the first batch will be delivered by the end of 2019. A contract was awarded to Hanjin Heavy Industries for ships 5 through 8 in June 2017, which are scheduled to be delivered after 2020. The contract for ships 9 through 12 were awarded in early 2018.[7] The PKX-B was specifically designed to counter North Korean fast swarming crafts. The 12-canister 130 mm guided rocket launcher can hit targets between 3–20 km (1.9–12.4 mi; 1.6–10.8 nmi) using a rocket weighing 80 kg (180 lb) with an 8 kg (18 lb) warhead. Rockets have GPS/INS midcourse guidance with data uplink and terminal IIR homing, and three can be fired simultaneously.[8]

Ships in the class
NamePennant numberBuilderLaunchedCommissionedDecommissionedStatus
PKX-A(PKG)
Yoon Youngha (윤영하) PKG-711 Hanjin Heavy Industries 28 June 2007 17 December 2008 Active
Han Sanggook (한상국) PKG-712 STX Offshore & Shipbuilding 23 September 2009 14 September 2011 Active
Jo Chunhyung (조천형) PKG-713 STX Offshore & Shipbuilding 23 September 2009 14 September 2011 Active
Hwang Dohyun (황도현) PKG-715 STX Offshore & Shipbuilding 11 December 2009 13 January 2012 Active
Suh Hoowon (서후원) PKG-716 STX Offshore & Shipbuilding 11 December 2009 28 November 2011 Active
Park Donghyuk (박동혁) PKG-717 Hanjin Heavy Industries 28 July 2010 28 November 2011 Active
Hyun Sihak (현시학) PKG-718 Hanjin Heavy Industries 28 July 2010 Active
Jung Geungmo (정긍모) PKG-719 Hanjin Heavy Industries 2 November 2010 19 December 2011[9] Active
Ji Deokchil (지덕칠) PKG-721 Hanjin Heavy Industries 2 November 2010 23 December 2011 Active
Lim Byeongrae (임병래) PKG-722 STX Offshore & Shipbuilding 20 November 2012 3 September 2013[10] Active
Hong Siuk (홍시욱) PKG-723 STX Offshore & Shipbuilding 20 November 2012 10 October 2013[11] Active
Hong Daeseon (홍대선) PKG-725 STX Offshore & Shipbuilding 20 November 2012 4 November 2013[12] Active
Han Munsik (한문식) PKG-726 Hanjin Heavy Industries 24 April 2013 28 January 2014[13] Active
Kim Changhak (김창학) PKG-727 Hanjin Heavy Industries 24 April 2013 4 March 2014[14] Active
Park Dongjin (박동진) PKG-728 Hanjin Heavy Industries 24 April 2013 1 April 2014[15] Active
Kim Soohyun (김수현) PKG-729 STX Offshore & Shipbuilding 30 April 2014 30 September 2014[16] Active
Lee Byungchul (이병철) PKG-733 STX Offshore & Shipbuilding 30 April 2014 28 November 2014[17] Active
Jeon Byeongik (전병익) PKG-732 STX Offshore & Shipbuilding 24 June 2016 11 January 2018[18] Active
PKX-B(PKMR)
Chamsuri-211(참수리-211)[19] PKMR-211 Hanjin Heavy Industries[20] 28 July 2016 30 October 2017 Active
Chamsuri-212(참수리-212) PKMR-212 Hanjin Heavy Industries[21] 21 December 2018 28 November 2019 Active
Chamsuri-213(참수리-213) PKMR-213 Hanjin Heavy Industries 21 December 2018 18 December 2019 Active
Chamsuri-215(참수리-215) PKMR-215 Hanjin Heavy Industries 21 December 2018 31 December 2019 Active
Chamsuri-216(참수리-216) PKMR-216 Hanjin Heavy Industries[22] 13 December 2019 Active
Chamsuri-217(참수리-217) PKMR-217 Hanjin Heavy Industries 13 December 2019 Active
Chamsuri-218(참수리-218) PKMR-218 Hanjin Heavy Industries 13 December 2019 Active
Chamsuri-219(참수리-219) PKMR-219 Hanjin Heavy Industries 13 December 2019 Active
Chamsuri-221(참수리-221) PKMR-221 Hanjin Heavy Industries 29 December 2020 Active
Chamsuri-222(참수리-222) PKMR-222 Hanjin Heavy Industries 29 December 2020 Active
Chamsuri-223(참수리-223) PKMR-223 Hanjin Heavy Industries 29 December 2020 Active
Chamsuri-225(참수리-225) PKMR-225 Hanjin Heavy Industries 29 December 2020 Active
Chamsuri-226(참수리-226) PKMR-226 Hanjin Heavy Industries 12 May 2022
Chamsuri-227(참수리-227) PKMR-227 Hanjin Heavy Industries 12 May 2022
Chamsuri-228(참수리-228) PKMR-228 Hanjin Heavy Industries 12 May 2022
Chamsuri-229(참수리-229) PKMR-229 Hanjin Heavy Industries 12 May 2022
  • The PKX-A first six ships were named after the sailors of patrol boat PKM 357, who were killed during the Second Battle of Yeonpyeong in 2002.
  • South Korean navies do not use the number '0', '4' when assigning Pennant numbers to their ships. In Korea, there is a superstitious belief that '4' is an unlucky number (much like Friday the 13th). '0' is also considered as bad luck. There are two exceptions, though - MLS 560 Wonsan and submarines.

References
  1. "차기고속정 1번함 '윤영하함' 결정". Munhwa Ilbo. 15 June 2007. Retrieved 2010-10-01.
  2. "Republic of Korea Navy's PKX High Speed Patrol Boats Powered by Compact GE LM500 Gas Turbines" (PDF). General Electric. Archived from the original (PDF) on 2016-08-01.
  3. "STX Engine Raided for Corruption". koreatimes.co.kr.
  4. "Doosan Successfully Demonstrates First Product of Waterjet Propulsion System". doosan.com. Archived from the original on 2017-03-02.
  5. "Navy launches high-speed patrol boat". JoongAng Daily. 2007-06-29. Retrieved 2009-06-14.
  6. "OPVs offer small navies greater presence". Ship & Boat International. March 2009. Retrieved 2009-06-14.
  7. South Korea's DAPA Orders Additional PKX-B Fast Attack Craft for ROK Navy - Navyrecognition.com, 28 June 2017
  8. LIG Nex1 PKX-B 130mm Guided Rocket Launcher to Counter Swarm Attacks - Navyrecognition.com, 25 October 2017
  9. 해군, 정긍모함 취역...PKG 개발 문제점 해결 Archived 2012-08-03 at archive.today
  10. ja:コムドクスリ級ミサイル艇
  11. "해군5성분전단 '홍시욱함' 취역". 11 October 2013.
  12. "유도탄고속함 12번함 홍대선함, 해군 인도".
  13. "유도탄 고속함 '한문식함' 취역". Archived from the original on 2014-02-03.
  14. "해군 14번째 유도탄 고속함 '김창학함' 취역".
  15. ""해양수호 선봉, PKG '박동진함' 취역"". www.anewsa.com. April 2014.
  16. "방사청, 유도탄고속함 16번함 '김수현함' 해군 인도".
  17. "방위사업청, 유도탄고속함 '이병철함' 해군에 인도 - 국제뉴스". 28 November 2014.
  18. Dominguez, Gabriel (January 25, 2018). "RoKN commissions 18th and final PKG-A-class patrol vessel". Jane's Information Group. The Republic of Korea Navy (RoKN) commissioned its 18th and final Yoon Youngha (PKG-A)-class fast patrol ship on 11 January, according to a 24 January statement by South Korea's Ministry of National Defense (MND). Jeon Byeongik , a 63 m-long fast patrol vessel built by STX Offshore & Shipbuilding, was commissioned at a ceremony held at the Jinhae naval base, near the southern South Korean port city of Busan.
  19. "서해 최전선 지키는 신형 고속정 진수" (in Korean). 2016-07-28. Retrieved 2017-09-02.
  20. "한진중공업 '차기고속정 1번함' 만든다" (in Korean).
  21. "한진重, 1991억 규모 차기고속정 수주..군함 건조 기술력 입증" (in Korean).
  22. "한진重, 해군함정 3500억 수주 '쾌거'" (in Korean).
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