Sejong the Great-class destroyer
ROKS Sejong the Great (DDG 991) during the 2008 Busan International Fleet Review
|Operators:||Republic of Korea Navy|
|Preceded by:||Chungmugong Yi Sun-sin class|
|Cost:||$923 million (per ship)|
|Length:||165 m (541 ft 4 in)|
|Beam:||21.4 m (70 ft 3 in)|
|Draft:||6.25 m (20 ft 6 in)|
|Speed:||exceeds 30 knots (56 km/h; 35 mph)|
|Range:||5,500 nautical miles (10,200 km; 6,300 mi)|
|Complement:||300-400 crew members|
|LIG Nex1 SLQ-200K Sonata electronic warfare suite|
|Aircraft carried:||Hangar for two Super Lynx or SH-60 Seahawk, one more on landing pad|
The Sejong the Great-class destroyers (Sejongdaewang-Ham or Hangul: 세종대왕급 구축함, Hanja: 世宗大王級驅逐艦), also known as KD-III, are guided missile destroyers of the Republic of Korea Navy (ROKN). The second ship was commissioned in August 2010. As of 2010, the ROKN has committed itself to deploy three ships with an option for three more.
The Sejong the Great class is the third phase of the Republic of Korea 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 Korea from various modes of threats as well as becoming a blue-water navy. At 8,500 tons standard displacement and 11,000 tons full load, the KDX-III Sejong the Great destroyers are by far the largest destroyers in the Republic of Korea Navy, and built slightly bulkier and heavier than Arleigh Burke-class destroyers or Atago-class destroyers to accommodate 32 more missiles. KDX-III are currently the largest surface warfare ships to carry the Aegis combat system.
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 foreign 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. Anti-aircraft armament consists of SM-2 Block IIIA and IIIB in 80-cell VLS. Anti-submarine warfare armaments consists of both K-ASROC Hong Sahng-uh (Red Shark) anti-submarine rockets and 32 K745 LW Cheong Sahng-uh (Blue Shark) torpedoes. Anti-ship capability is provided by 16 SSM-700K Hae Sung (Sea Star) long-range anti-ship missile, each with performance similar to the U.S. Harpoon. Land-attack capability is provided by the recently developed Hyunmoo-3C (Guardian of the Northern Sky) cruise missile, which is similar to the U.S. Tomahawk.
- VLS: 128 cell
- Mk 41 VLS 48 cell (Fwd)
- Mk 41 VLS 32 cell (Aft)
- K-VLS 48 cell (Aft)
- Anti-ship missile launchers: 16
Sejong the Great-class destroyers' are often compared to the Arleigh Burke and Atago classes because they utilize the AN/SPY-1 multi-function radar, 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 will have a capacity of 128 missiles, as opposed to 96 on the Arleigh Burke class (although ships in the Arleigh Burke class have the capability to quad-pack 4 ESSM missiles into one launch cell, greatly increasing armament) and the Japanese Atago-class destroyers. The Sejong the Great class is thus one of the most heavily armed ships in the world second only to the Kirov-class battlecruiser with 352 missiles. Another similarity to Arleigh Burke Flight IIA and Atago-class destroyers is the presence of full facilities for two helicopters, a feature missing from earlier Arleigh Burke and Kongō-class destroyers.
Three of these destroyers have, according to South Korean newspaper Chosun Ilbo, the capability to "track and monitor any missile launched from anywhere from the North." This capability was demonstrated by the tracking of a North Korean missile in April 2009.
On April 20, 2007, Chief of Naval Operations of the Republic of Korea Navy announced that the lead ship of KDX-III class destroyers will be referred as Sejong the Great. Sejong the Great (Hangul: 세종대왕) is the fourth king of the Joseon Dynasty of Korea. He is credited with the creation of the Korean alphabet, Hangul.
Ships in the class
|Sejong the Great (Korean: Sejongdaewang)||DDG-991||Hyundai Heavy Industries||25 May 2007||22 December 2008||Active|
|Yulgok Yi I||DDG-992||Daewoo Shipbuilding & Marine Engineering||14 November 2008||31 August 2010||Active|
|Seoae Ryu Seong-ryong||DDG-993||Hyundai Heavy Industries||24 March 2011||30 August 2012||Active|
- Korean Destroyer eXperimental
- Gwanggaeto the Great-class destroyer
- Chungmugong Yi Sun-sin-class destroyer
- "ROK (Republic of Korea) Navy to increase KDX-III Aegis destroyers to six by 2027". December 11, 2013.
- Aegis Weapon System Verified During Korean Navy Ship Trials
- "KDX-III / DDH-III Sejongdaewang". Guide to Military Equipment and Civil Aviation. Retrieved 2009-04-07.
These ships will be the world's first combining proven AEGIS and RAM.
- "Korea to acquire new missiles for Aegis destroyer". The Korea Herald. 2009-06-28. Retrieved 2009-06-27.
- "Republic of Korea - SM-2 Standard Missiles" (PDF). Defense Security Cooperation Agency. 2009-05-26. Retrieved 2009-06-27.
- Burleson, Mike (2010-05-25). "South Korean Naval Plight Our Own". New Wars. Retrieved 2011-11-10.