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Sejong the Great-class destroyer

January 07, 2023

The Sejong the Great-class destroyers (Sejongdaewang-Geup Guchukam or Hangul: 세종대왕급 구축함, Hanja: 世宗大王級驅逐艦), also known as KDX-III, are three guided-missile destroyers of the Republic of Korea Navy (ROKN).[2]

ROKS Sejong the Great (DDG-991)
Class overview
Builders
Operators Republic of Korea Navy
Preceded by Chungmugong Yi Sun-sin class
Succeeded byKDDX-class destroyer
Cost$923 million[1]
Planned6
Building5
Completed4
Active3
General characteristics
TypeGuided-missile destroyer
Displacement
  • 7,650 tons standard displacement
  • 10,600 tons full load
LengthBatch 1 166 m (544 ft 7 in), Batch 2 170 m (557 ft 9 in)
Beam21.4 m (70 ft 3 in)
Draft6.25 m (20 ft 6 in)
Propulsion
Speedexceeds 30 knots (56 km/h; 35 mph)
Range5,500 nmi (10,200 km; 6,300 mi)
Endurance30 days
Complement300
Sensors and
processing systems
  • AN/SPY-1D(V) multi-function radar
  • AN/SPG-62 fire control radar
  • DSQS-21BZ-M hull-mounted sonar
  • SQR-220K towed array sonar system
  • Sagem Infrared Search & Track (IRST) system
Electronic warfare
& decoys		LIG Nex1 SLQ-200K Sonata electronic warfare suite
Armament
Aircraft carried2 × Super Lynx or SH-60 Seahawk
Aviation facilitiesHangar and helipad

Hull name

On 20 April 2007, South Korean Chief of Naval Operations announced that the lead ship of KDX-III class destroyers will be referred to as Sejong the Great. Sejong the Great (Hangul: 세종대왕) is the fourth king of the Josun Dynasty of Korea. He is credited with the creation of the indigenous Korean system of writing.[3]

Background

The Sejong the Great class is the third phase of the South Korean navy's Korean Destroyer eXperimental (KDX) program, a substantial shipbuilding program, which is geared toward enhancing ROKN's ability to successfully defend the maritime areas around South Korea from various modes of threats as well as becoming a blue-water navy.[4]

At 8,500 tons standard displacement and 11,000 tons full load, the KDX-III Sejong the Great destroyers are the largest destroyers in the South Korean Navy and larger than most destroyers in the navies of other countries.[5] They are built slightly bulkier and heavier than Arleigh Burke-class destroyers or Atago-class destroyers to accommodate 32 more missiles. As such, some analysts believe that this class of ships is more appropriately termed a class of cruisers rather than destroyers.[6] KDX-III are currently the largest ships to carry the Aegis combat system.[7]

Armaments

Sejong the Great-class destroyers' main gun is the 127 mm/L62 Mk 45 Mod 4 naval gun, an improved version of the same gun used on other warships from several other nations. Point-defense armaments include one 30 mm Goalkeeper CIWS and a RIM-116 Rolling Airframe Missile Block 1 21-round launcher, the first Aegis platform to carry RAM.[8] Anti-aircraft armament consists of SM-2 Block IIIA and IIIB[9][10] in 80 total Mk 41 VLS cells. Block IIIB has added infrared (IR) induction mode to Block IIIA, improving interception capability.

Anti-submarine warfare armaments consists of both K-ASROC Hong Sang-uh (Red Shark) anti-submarine rockets, which have the same form as the U.S. ASROC, and 32 K745 LW Cheong Sang-uh (Blue Shark) torpedoes. Anti-ship capability is provided by 16 SSM-700K Hae Sung (Sea Star) long-range anti-ship missiles, each with performance similar to the U.S. Harpoon. It is equipped on a navy ship that is built after the late KDX-II destroyers. Land-attack capability is provided by the Hyunmoo III cruise missile.[4]

Missile batteries

  • Vertical Launching System: 128 total cells
    • Mk 41 VLS 48 cells (Fwd)
    • Mk 41 VLS 32 cells (Aft)
    • K-VLS 48 cells (Aft)
  • Anti-ship missile launchers:
    • 16 (4 × quadruple) launchers

Capabilities

The ship features the Aegis Combat System (Baseline 7 Phase 1) combined with AN/SPY-1D(V) multi-function radar antennae.[11][4] This gives the destroyers the ability to track missiles launched from anywhere in North Korea. This capability was demonstrated by the tracking of a North Korean missile in April 2009.[12]

The Sejong the Great-class destroyers are often compared to the Arleigh Burke and Atago classes because they utilize the AN/SPY-1D multi-function radar, and have similar propulsion and capabilities. One notable difference between the Sejong the Great-class ships and Arleigh Burkes is the number of VLS cells. Destroyers of the Sejong the Great class have a capacity of 128 missiles, as opposed to 96 on the Arleigh Burke class and the Japanese Atago-class destroyers. The Sejong the Great class is thus one of the most heavily armed ships in the world,[13] with greater missile capacity than the Chinese People's Liberation Army Navy Type 055 destroyer[14] (112 VLS cells) and the U.S. Navy Ticonderoga-class guided-missile cruiser (122 VLS cells). The Sejong the Great class is surpassed in VLS depth only by the Kirov-class battlecruiser with 352 missiles (entire missile load).[15]

Another similarity to Arleigh Burke Flight IIA and Atago-class destroyers is the presence of full facilities for two helicopters,[1] a feature missing from earlier Arleigh Burke[16] and Kongō-class destroyers.[17]

BMD

In August 2016, press reports revealed that South Korea was considering adding the SM-3 interceptor to its Sejong the Great-class ships to enable them to perform ballistic missile defense in response to North Korean efforts to bolster offensive missile capabilities. This came months after the U.S. decision to deploy the THAAD missile interceptor system on mainland South Korea. The addition of SM-3s to the ships may require software and computer hardware upgrades.[18] The following month, Aegis manufacturer Lockheed Martin confirmed the next three Sejong the Great vessels will be capable of performing "integrated air and missile defense" (IAMD) to supplement U.S. Army ground-based missile interceptors on the peninsula, likely being outfitted with the SM-3. While the first three destroyers are fitted with Aegis Baseline 7 based on older proprietary computers that can't carry out IAMD operations, the following three will be fitted with the Baseline 9 version of the Aegis Combat System that combines modern computing architecture to allow the AN/SPY-1D(V) radar to perform air warfare and BMD missions at the same time.[19]

Ships in the class

Name Pennant number Builder Launched Commissioned Status
Batch I
ROKS Sejong the Great (Korean: 세종대왕함) DDG-991 Hyundai Heavy Industries 25 May 2007 22 December 2008 Active
ROKS Yulgok Yi I (Korean: 율곡 이이함) DDG-992 Daewoo Shipbuilding & Marine Engineering 14 November 2008 31 August 2010 Active
ROKS Seoae Ryu Seong-ryong (Korean: 서애 류성룡함) DDG-993 Hyundai Heavy Industries 24 March 2011 30 August 2012 Active
Batch II
ROKS Jeongjo the Great (Korean: 정조대왕) DDG-995 Hyundai Heavy Industries 28 July 2022 Launched

On 10 October 2019, HHI signed a deal to build the first of three 170m long, KDX-III Batch II Aegis destroyers for the Republic of Korea Navy. The Sejong the Great class is KDX-III Batch-I, and Korean Navy is planning 3 ships of KDX-III Batch-II.[20] Under the deal, HHI will deliver the first ship by November 2024.[21]

See also

References

  1. ^ a b "Sejong the Great Class Guided Missile Destroyer | Military-Today.com". www.military-today.com. Retrieved 26 December 2022.
  2. ^ "ROK (Republic of Korea) Navy to increase KDX-III Aegis destroyers to six by 2027". 11 December 2013. from the original on 12 December 2013. Retrieved 12 December 2013.
  3. ^ Kim-Renaud, Young-Key (Spring 2000). "Sejong's Theory of Literacy and Writing" (PDF). Studies in the Linguistic Sciences. 30: 13–45 – via CORE.
  4. ^ a b c "Sejong the Great (Sejongdaewang) class Destroyer - KDX-III". www.navyrecognition.com. Retrieved 26 December 2022.
  5. ^ "Koreas KDX-III AEGIS Destroyers". from the original on 11 December 2009. Retrieved 8 March 2010.
  6. ^ "Sejong the Great Class Guided Missile Destroyer." http://www.military-today.com/navy/sejong_the_great_class.htm
  7. ^ "Aegis Weapon System Verified During Korean Navy Ship TrialsDefenceTalk.com - at DefenceTalk". www.defencetalk.com. from the original on 5 December 2010. Retrieved 21 October 2010.
  8. ^ "KDX-III / DDH-III Sejongdaewang". Guide to Military Equipment and Civil Aviation. from the original on 7 October 2006. Retrieved 7 April 2009. These ships will be the world's first combining proven AEGIS and RAM.
  9. ^ "Korea to acquire new missiles for Aegis destroyer". The Korea Herald. 28 June 2009. Retrieved 27 June 2009.
  10. ^ (PDF). Defense Security Cooperation Agency. 26 May 2009. Archived from the original (PDF) on 27 May 2011. Retrieved 27 June 2009.
  11. ^ LaGrone, Sam (6 September 2016). "New South Korean Destroyers to Have BMD Capability". USNI News. Retrieved 26 December 2022.
  12. ^ "Korea Launches 3rd Aegis Destroyer". from the original on 14 June 2012. Retrieved 10 May 2012.
  13. ^ Burleson, Mike (25 May 2010). "South Korean Naval Plight Our Own". New Wars. from the original on 28 October 2011. Retrieved 10 November 2011.
  14. ^ China's New Guided Missile Destroyer To Be Its Biggest Yet 6 December 2016 at the Wayback Machine - Popularmachanics.com, 24 October 2016
  15. ^ Kirov class 4 March 2016 at the Wayback Machine - Military-Today.com
  16. ^ "DDG-51 ARLEIGH BURKE-class - Navy Ships". man.fas.org. Retrieved 26 December 2022.
  17. ^ "Kongo class". Weaponsystems.net. Retrieved 26 December 2022.
  18. ^ Report: South Korea Wants BMD Capability for Guided Missile Destroyers 15 August 2016 at the Wayback Machine - News.USNI.org, 15 August 2016
  19. ^ New South Korean Destroyers to Have Ballistic Missile Defense Capability 7 September 2016 at the Wayback Machine - News.USNI.org, 6 September 2016
  20. ^ "Hyundai Heavy bags 677 bln-won deal to build upgraded Aegis destroyer". 10 October 2019. Retrieved 10 October 2019.
  21. ^ "South Korea's Mid-Term Defense Procurement Plan Largely Unaffected By COVID-19 Crisis". May 2020.

External links

January 07, 2023
sejong, great, class, destroyer, sejongdaewang, geup, guchukam, hangul, 세종대왕급, 구축함, hanja, 世宗大王級驅逐艦, also, known, three, guided, missile, destroyers, republic, korea, navy, rokn, roks, sejong, great, class, overviewbuildershyundai, heavy, industries, daewoo, s. The Sejong the Great class destroyers Sejongdaewang Geup Guchukam or Hangul 세종대왕급 구축함 Hanja 世宗大王級驅逐艦 also known as KDX III are three guided missile destroyers of the Republic of Korea Navy ROKN 2 ROKS Sejong the Great DDG 991 Class overviewBuildersHyundai Heavy Industries Daewoo Shipbuilding amp Marine EngineeringOperators Republic of Korea NavyPreceded byChungmugong Yi Sun sin classSucceeded byKDDX class destroyerCost 923 million 1 Planned6Building5Completed4Active3General characteristicsTypeGuided missile destroyerDisplacement7 650 tons standard displacement 10 600 tons full loadLengthBatch 1 166 m 544 ft 7 in Batch 2 170 m 557 ft 9 in Beam21 4 m 70 ft 3 in Draft6 25 m 20 ft 6 in Propulsion4 General Electric LM2500 COGAG 2 shafts 100 000 shp 75 000 kW produced powerSpeedexceeds 30 knots 56 km h 35 mph Range5 500 nmi 10 200 km 6 300 mi Endurance30 daysComplement300Sensors and processing systemsAN SPY 1D V multi function radar AN SPG 62 fire control radar DSQS 21BZ M hull mounted sonar SQR 220K towed array sonar system Sagem Infrared Search amp Track IRST systemElectronic warfare amp decoysLIG Nex1 SLQ 200K Sonata electronic warfare suiteArmament1 5 inch 127 mm L62 caliber Mk 45 Mod 4 naval gun 1 30 mm Goalkeeper CIWS 1 RAM Block 1 CIWS 16 SSM 700K Haeseong anti ship missile 2 triple torpedo tubes for K745 Blue Shark torpedo1 48 cell 1 32 cell 80 cells Mk 41 VLS for SM 2 Block IIIB IV1 48 cell K VLS for K ASROC Red Shark Hyunmoo III land attack cruise missilesAircraft carried2 Super Lynx or SH 60 SeahawkAviation facilitiesHangar and helipad Contents 1 Hull name 2 Background 3 Armaments 4 Capabilities 4 1 BMD 5 Ships in the class 6 See also 7 References 8 External linksHull name EditOn 20 April 2007 South Korean Chief of Naval Operations announced that the lead ship of KDX III class destroyers will be referred to as Sejong the Great Sejong the Great Hangul 세종대왕 is the fourth king of the Josun Dynasty of Korea He is credited with the creation of the indigenous Korean system of writing 3 Background EditThe Sejong the Great class is the third phase of the South Korean navy s Korean Destroyer eXperimental KDX program a substantial shipbuilding program which is geared toward enhancing ROKN s ability to successfully defend the maritime areas around South Korea from various modes of threats as well as becoming a blue water navy 4 At 8 500 tons standard displacement and 11 000 tons full load the KDX III Sejong the Great destroyers are the largest destroyers in the South Korean Navy and larger than most destroyers in the navies of other countries 5 They are built slightly bulkier and heavier than Arleigh Burke class destroyers or Atago class destroyers to accommodate 32 more missiles As such some analysts believe that this class of ships is more appropriately termed a class of cruisers rather than destroyers 6 KDX III are currently the largest ships to carry the Aegis combat system 7 Armaments EditSejong the Great class destroyers main gun is the 127 mm L62 Mk 45 Mod 4 naval gun an improved version of the same gun used on other warships from several other nations Point defense armaments include one 30 mm Goalkeeper CIWS and a RIM 116 Rolling Airframe Missile Block 1 21 round launcher the first Aegis platform to carry RAM 8 Anti aircraft armament consists of SM 2 Block IIIA and IIIB 9 10 in 80 total Mk 41 VLS cells Block IIIB has added infrared IR induction mode to Block IIIA improving interception capability Anti submarine warfare armaments consists of both K ASROC Hong Sang uh Red Shark anti submarine rockets which have the same form as the U S ASROC and 32 K745 LW Cheong Sang uh Blue Shark torpedoes Anti ship capability is provided by 16 SSM 700K Hae Sung Sea Star long range anti ship missiles each with performance similar to the U S Harpoon It is equipped on a navy ship that is built after the late KDX II destroyers Land attack capability is provided by the Hyunmoo III cruise missile 4 Missile batteries Vertical Launching System 128 total cells Mk 41 VLS 48 cells Fwd Mk 41 VLS 32 cells Aft K VLS 48 cells Aft Anti ship missile launchers 16 4 quadruple launchersCapabilities EditThe ship features the Aegis Combat System Baseline 7 Phase 1 combined with AN SPY 1D V multi function radar antennae 11 4 This gives the destroyers the ability to track missiles launched from anywhere in North Korea This capability was demonstrated by the tracking of a North Korean missile in April 2009 12 The Sejong the Great class destroyers are often compared to the Arleigh Burke and Atago classes because they utilize the AN SPY 1D multi function radar and have similar propulsion and capabilities One notable difference between the Sejong the Great class ships and Arleigh Burkes is the number of VLS cells Destroyers of the Sejong the Great class have a capacity of 128 missiles as opposed to 96 on the Arleigh Burke class and the Japanese Atago class destroyers The Sejong the Great class is thus one of the most heavily armed ships in the world 13 with greater missile capacity than the Chinese People s Liberation Army Navy Type 055 destroyer 14 112 VLS cells and the U S Navy Ticonderoga class guided missile cruiser 122 VLS cells The Sejong the Great class is surpassed in VLS depth only by the Kirov class battlecruiser with 352 missiles entire missile load 15 Another similarity to Arleigh Burke Flight IIA and Atago class destroyers is the presence of full facilities for two helicopters 1 a feature missing from earlier Arleigh Burke 16 and Kongō class destroyers 17 BMD Edit In August 2016 press reports revealed that South Korea was considering adding the SM 3 interceptor to its Sejong the Great class ships to enable them to perform ballistic missile defense in response to North Korean efforts to bolster offensive missile capabilities This came months after the U S decision to deploy the THAAD missile interceptor system on mainland South Korea The addition of SM 3s to the ships may require software and computer hardware upgrades 18 The following month Aegis manufacturer Lockheed Martin confirmed the next three Sejong the Great vessels will be capable of performing integrated air and missile defense IAMD to supplement U S Army ground based missile interceptors on the peninsula likely being outfitted with the SM 3 While the first three destroyers are fitted with Aegis Baseline 7 based on older proprietary computers that can t carry out IAMD operations the following three will be fitted with the Baseline 9 version of the Aegis Combat System that combines modern computing architecture to allow the AN SPY 1D V radar to perform air warfare and BMD missions at the same time 19 Ships in the class EditName Pennant number Builder Launched Commissioned StatusBatch IROKS Sejong the Great Korean 세종대왕함 DDG 991 Hyundai Heavy Industries 25 May 2007 22 December 2008 ActiveROKS Yulgok Yi I Korean 율곡 이이함 DDG 992 Daewoo Shipbuilding amp Marine Engineering 14 November 2008 31 August 2010 ActiveROKS Seoae Ryu Seong ryong Korean 서애 류성룡함 DDG 993 Hyundai Heavy Industries 24 March 2011 30 August 2012 ActiveBatch IIROKS Jeongjo the Great Korean 정조대왕 DDG 995 Hyundai Heavy Industries 28 July 2022 LaunchedOn 10 October 2019 HHI signed a deal to build the first of three 170m long KDX III Batch II Aegis destroyers for the Republic of Korea Navy The Sejong the Great class is KDX III Batch I and Korean Navy is planning 3 ships of KDX III Batch II 20 Under the deal HHI will deliver the first ship by November 2024 21 See also EditList of naval ship classes in service List of active Republic of Korea Navy shipsReferences Edit a b Sejong the Great Class Guided Missile Destroyer Military Today com www military today com Retrieved 26 December 2022 ROK Republic of Korea Navy to increase KDX III Aegis destroyers to six by 2027 11 December 2013 Archived from the original on 12 December 2013 Retrieved 12 December 2013 Kim Renaud Young Key Spring 2000 Sejong s Theory of Literacy and Writing PDF Studies in the Linguistic Sciences 30 13 45 via CORE a b c Sejong the Great Sejongdaewang class Destroyer KDX III www navyrecognition com Retrieved 26 December 2022 Koreas KDX III AEGIS Destroyers Archived from the original on 11 December 2009 Retrieved 8 March 2010 Sejong the Great Class Guided Missile Destroyer http www military today com navy sejong the great class htm Aegis Weapon System Verified During Korean Navy Ship TrialsDefenceTalk com at DefenceTalk www defencetalk com Archived from the original on 5 December 2010 Retrieved 21 October 2010 KDX III DDH III Sejongdaewang Guide to Military Equipment and Civil Aviation Archived from the original on 7 October 2006 Retrieved 7 April 2009 These ships will be the world s first combining proven AEGIS and RAM Korea to acquire new missiles for Aegis destroyer The Korea Herald 28 June 2009 Retrieved 27 June 2009 Republic of Korea SM 2 Standard Missiles PDF Defense Security Cooperation Agency 26 May 2009 Archived from the original PDF on 27 May 2011 Retrieved 27 June 2009 LaGrone Sam 6 September 2016 New South Korean Destroyers to Have BMD Capability USNI News Retrieved 26 December 2022 Korea Launches 3rd Aegis Destroyer Archived from the original on 14 June 2012 Retrieved 10 May 2012 Burleson Mike 25 May 2010 South Korean Naval Plight Our Own New Wars Archived from the original on 28 October 2011 Retrieved 10 November 2011 China s New Guided Missile Destroyer To Be Its Biggest Yet Archived 6 December 2016 at the Wayback Machine Popularmachanics com 24 October 2016 Kirov class Archived 4 March 2016 at the Wayback Machine Military Today com DDG 51 ARLEIGH BURKE class Navy Ships man fas org Retrieved 26 December 2022 Kongo class Weaponsystems net Retrieved 26 December 2022 Report South Korea Wants BMD Capability for Guided Missile Destroyers Archived 15 August 2016 at the Wayback Machine News USNI org 15 August 2016 New South Korean Destroyers to Have Ballistic Missile Defense Capability Archived 7 September 2016 at the Wayback Machine News USNI org 6 September 2016 Hyundai Heavy bags 677 bln won deal to build upgraded Aegis destroyer 10 October 2019 Retrieved 10 October 2019 South Korea s Mid Term Defense Procurement Plan Largely Unaffected By COVID 19 Crisis May 2020 External links EditKDX III Destroyer KDX III armaments Archived 7 October 2006 at the Wayback Machine Retrieved from https en wikipedia org w index php title Sejong the Great class destroyer amp oldid 1131796181, wikipedia, wiki, book, books, library,

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