Friday, 13 September 2013

Vice-Admiral's Choice: Sohn Won-yil Class Submarines (Lead Ship: SS-072 ROKS Sohn Won-yil)

The Type 214 is a diesel-electric submarine developed by Howaldtswerke-Deutsche Werft GmbH (HDW). It features diesel propulsion with an air-independent propulsion (AIP) system using Siemens polymer electrolyte membrane (PEM) hydrogen fuel cells. The Type 214 submarine is derived from the Type 212,  but as an export variant it lacks some of the classified technologies of its smaller predecessor most important of which is the non magnetic steel hull which makes the Type 212 submarine impossible to detect using a Magnetic Anomaly Detector.

The Republic of Korea Navy has ordered nine Type 214 submarines, designated as Sohn Won-yil Class (Hangul/Hanja: 손원일급잠수함/孫元一級潛水艦; Codename: KSS-II), to be built in Korea by Hyundai Heavy IndustriesDaewoo Shipbuilding & Marine Engineering and STX Offshore & Shipbuilding; three first batch models had entered service since 2007, and six second batch models will enter service from 2012.

The South Korean Sohn Won-yil U214 class is equipped with a SPHINX-D Radar System supplied by Thales Defence Deutschland GmbH. It uses an additional pulse transmitter in the top of the mast. The combination of high power pulse radar and a very low power LPI transmitter is very effective for submarines. During surface operations, the boat sails with an open pulse fingerprint for ESM systems, but within a secret mission the operator switches to LPI mode. The boat remains invisible to others.

South Korea ordered its first 3 KSS-II/ Type 214 boats in 2000, which were assembled by Hyundai Heavy Industries. The Batch 2 order will add 6 more submarines to the Navy, to be built by Daewoo Shipbuilding & Marine Engineering.

General Characteristics
  • Displacement: 1,690 t surfaced / 1,860 t submerged
  • Dimensions: length 213 feet 3 inches (65 m) / beam 20 feet 8 inches (6.3 m) / draught 19 feet 8 inches (6 m)
  • Pressure hull: HY-100
  • Armament: 8 x 533 mm torpedo tubes, 4 subharpoon-capable
  • Propulsion: low noise skew back propeller
  • Diesel engines: 2 x MTU 16V-396 (3.96 MW)
  • Charging generators: 2 x Piller Ntb56.40-10 0.97 MW
  • AIP system: 2 x HDW PEM fuel cell module BZM120 (120 kW x 2)
  • Electric motor: 1 x Siemens Permasyn (2.85 MW)
  • Speed: 12 kt surfaced / 20 kt submerged
  • Speed on fuel cells: 2-6 kt estimated
  • Range surfaced: 12,000 miles (19,300 km)
  • Range submerged: 420 nmi @ 8 kt (780 km @ 15 km/h)
  • Range on fuel cells: 1,248 nmi @ 4 kt (2,310 km @ 7 km/h)
  • Mission endurance: 12 weeks
  • Submerged without snorkelling: 3 weeks
  • Operating depth: more than 250 m officially, 400 m estimated
  • Complement: 5 officers + 22 crew
  • Navigation radar: SPHINX-D with 4Kw pulse and tactical LPI radar sensor [Thales Deutschland Kiel]

Wednesday, 7 August 2013

Tribute to Liancourt Rocks: Dokdo Class Amphibious Ship - Lead Ship: LPH-6111 ROKS Dokdo

Heidemarie: Dokdo belongs to Republic of Korea, as well as this ship.

ROKS Dokdo (LPH-6111) is the lead ship of the Dokdo-Class Amphibious Landing Ship (Dokdo-geup Daehyeong Susong-ham; Hangul/Hanja: 독도급 대형수송함/獨島級大型輸送艦) of the Republic of Korea Navy, launched on 12 July 2005 at the shipyard of Hanjin Heavy Industries & Constructions Co. Ltd. in Bongnae-dong 5(o)-ga, Busan Yeongdo-gu. It is bestowed from Dokdo, an island which is located 70km (43.5 miles) from Ulleung Island (Ulleung County), Northern Gyeongsang Province. The Japanese called that island as 'Takeshima' but they still dispute about the soverignity of that island even though Republic of Korea Coast Guard took control the island in 1954. Technically, Dokdo belongs to Republic of Korea.

Designed by Hanjin Heavy Industries, the requirements for the amphibious landing ships were to enhance Korea's current amphibious operation capability, both in terms of assault and military operations other than war (MOOTW) type operations.

The ROKN needed a versatile landing ship with amphibious capabilities in its program to build a blue-water navy. In the end Hanjin's Dokdo design was chosen for this need. LSF-II 631-also built by Hanjin was chosen as the LCAC to operate from the ship.

The LPX is a versatile amphibious warfare ship, and includes a well deck to accommodate Amphibious Assault Vehicles (AAVs) and two Landing Craft Air Cushion (LCAC), the first of which (LSF 631) was acquired in April 2007. The ship is 199 metres long, 31 metres wide, with a 14,000 ton (empty), or 18,000 ton (full) displacement and was also built incorporating stealth technologies. Its been said to be one of the most advanced vessels in the Asian Pacific.

As a high-speed amphibious ship, LPX was based on the concept of "over-the-horizon assault." As the name indicates, the "over-the-horizon assault" comprises a military operation in which an amphibious landing operation is conducted with high-speed air-cushioned vehicles and helicopters from beyond the horizon, where they can't be easily detected or attacked by the enemy. The conventional LST (landing ship tank) has to approach the coastline for landing, at the risk of being fired upon by the enemy.

The LPX can carry 720 marines (+300 crew members), 10 tanks, 10 trucks, 7 AAVs, three field artillery pieces, and two LCAC hovercraft capable of landing on enemy shores doing 40 knots (74 km/h)—a mix that enables it to launch troop landings from both sea and air. She can also carry 10 helicopters when there are no ground vehicles on her hangar deck.

The flight surface is also sprayed with urethane, which can support VTOL jets, like Harriers. South Korea is considering the purchase of F-35B fighters to operate from its Dokdo class ships. Nowadays, the LPX operates mainly UH-1H and UH-60P. But both of these are designed for land‐based operations and lacked of consideration for ship-borne operations such as protection against damage from salty breezes, so it is difficult to operate on-board continuously. The KUH-Amphibious, the sea-based amphibious variant of the KAI Surion, is now under development, production is planned to commence in late 2015, with some 40 helicopters planned.

Self-defense armament includes the RIM-116 Rolling Airframe Missile system. The Goalkeeper Close-in weapon system (CIWS) was purchased in January 2003 from Thales, at per-set price of 13 billion won (roughly $15,000,000). Dokdo is similar in size to the light aircraft carriers derived from Sea Control Ship, such as Spanish Navy's former aircraft carrier SPS Príncipe de Asturias (Prince of Asturias in Spanish) and the Royal Thai Navy's HTMS Chakri Naruebet (Thai: จักรีนฤเบศร; in honor of the Chakri Dynasty).

General characteristics
Landing Platform Helicopter
14,300 tons (empty) / 18,800 tons (full)
199 m (653 ft)
31 m (102 ft)
7 m (23 ft)
SEMT Pielstick 16 PC2.5 STC Diesel engine
23 knots (43 km/h) maximum
18 knots (33 km/h) cruising
Boats & landing
craft carried:
Up to 200 vehicles
includes 6 tanks, 7 AAVs
720 marines
Sensors and
processing systems:
SMART-L air search radar, MW08 surface search radar, AN/SPS-95K navigation radar, TACAN, VAMPIR-MB optronic sight
Electronic warfare
& decoys:
ESM/ECM:SLQ-200(v)5K SONATA, Chaff launcher
2 × Goalkeeper CIWS
1 × RIM-116 Rolling Airframe Missile
Aircraft carried:
Up to 10 helicopters
(UH-1H, UH-60P or Super Lynx)
Aviation facilities:
Flight deck with 5 landing spots and hangar

Thursday, 20 June 2013

Turkish Brigade, The Korean Islamic Catalyst

Kudos to you, Turkish PM Recep Tayyip Erdoğan, you have given us an idea about this stuff.

The Turkish Brigade (code name North StarTurkishŞimal Yıldızı or Kutup Yıldızı) was a Turkish Army Infantry Brigade that served under United Nations command during the Korean War between 1950 to 1953. Attached to the U.S. 25th Infantry Division the Turkish Brigade fought in several actions, and was awarded Unit Citations from Korea and the United States after fighting in the Kunuri Battle.

On 29 June 1950 the government of the Republic of Turkey replied to the United Nations Resolution 83 requesting military aid to South Korea, following the attack initiated by North Korea on 25 June. The cable stated: "Turkey is ready to meet his responsibilities." On 25 July 1950 the Turkish government decided to send a brigade of 5,000 troops comprising three infantry battalions, an artillery battalion and auxiliary units, to fight under UN Command against North Korea and subsequently the People's Republic of China. Turkey was the second country to answer the UN call, after the United States.

Three different Turkish Brigades served in the Korean War, each replacing the previous one each year. The core of the 1st Turkish Brigade was the 241st Infantry Regiment based at Ayaş which was supplemented with volunteers to raise it to brigade level. Brigadier General Tahsin Yazıcı, a veteran of World War I, who had volunteered to be demoted to lead this force, commanded the 1st Brigade.

The advance party of the Turkish Brigade arrived in Busan on 12 October 1950. The main body arrived five days later, October 17 from the eastern Mediterranean port of Iskenderun, Turkey, and the brigade went into bivouac near Daegu where it underwent training and received U.S. equipment. The brigade was attached to the U.S. 25th Infantry Division.

The bulk of the enlisted men were from small towns and villages in the mountains of eastern Turkey. For these volunteer officers and volunteer enlisted men who were just completing their compulsory two year service, it was not only the first time that they had left their native country—it was the first time they had been out of the villages of their birth. It was, at least for the enlisted men, the first time that they had encountered non-Muslims. Vast cultural and religious differences existed between the Turks and the Americans.

The U.S. Army command was unaware of the difficulties in coordination, logistics and, above all, basic communication in a common language that would complicate orders and troop movements, especially in the crucial early months of their joint exercises. Unfamiliar food, clothing requirements and transportation would come to create more problems than the American high command had counted on.

The dietary requirements of the Turks forbade pork products, and the American rations contained pork products forbidden to all Muslims. A Japanese cook was hired to provide rations that met the Turkish requirements. Bread and coffee presented other problems. The Turks favored a heavy, substantial bread containing non-bleached flour along with thick, strong, heavily sweetened coffee. Most of the enlisted men had fierce looks, flowing mustaches and carried a sidearm sword that, to Americans and the other U.N. troops, appeared to be a long knife, all of which attracted much media attention.

In addition to their contributions on the battlefield, the Turks also aided in humanitarian work, helping to operate war-time schools for war orphans. Shortly after the war, some Turks who were stationed in South Korea as UN peacekeepers began teaching Koreans about Islam. That means the Turks taught newly-converted Korean Muslims about Hanifite School of Islam (Hanafi), one of the Islamic sect (maddhab) in Ahli Sunnah wal Jama'ah Group because the default Islamic Sect for Turkey is Hanafism. 

Early converts established the Korea Muslim Society in 1955, at which time the first South Korean mosque was erected. The Korea Muslim Society grew large enough to become the Korea Muslim Federation in 1967.

Thursday, 21 February 2013

The Pride of Goryeo Dynasty: DDH-981 ROKS Choi Young

DDH-981 ROKS Choi Young a.k.a Choe Yeong was part of the second batch of Chungmugong Yi Sunshin class destroyers that were delivered to the Republic of Korea Navy. She was built by Hyundai Heavy Industries and was launched on 20 October 2006, entering service on 4 September 2008. She is bestowed from Choe Yeong, the General of Goryeo Dynasty. She is about 150 metres (490 ft) long, 17 metres (56 ft) wide and displaces between 4,800 and 5,000 tons. Her propulsion unit is a CODOG unit, capable of propelling her at speeds of up to 30 knots (35 mph). She has a crew complement of 200. Her armament consists of a 32-cell VLS (with space to install a 64-cell system), a Mk 45 gun, a RAM launcher, a Goalkeeper CIWS and eight Harpoon anti-ship missiles. Other systems include an AN/SPS-49 radar, an MW08 radar, and a DSQ-23 sonar.

The Choe Yeong was assigned to patrol the Northern Limit Line in November 2009 after a boundary dispute clash with North Korea, the first of its kind in seven years. In August 2010, the ship participated in a series of naval drills in the Yellow Sea, four months after the sinking of the PCC-772 ROKS Cheonan of Pohang-class Corvette.

On 15 January 2011, the Norwegian-owned chemical tanker Samho Jewelry was captured by Somali pirates while en route from the United Arab Emirates to Sri Lanka. The South Korean operator of the vessel, the Samho Shipping Company, was facing huge losses because it was obligated to continue paying Norwegian investors under its charter even while the vessel was held by pirates. However, the Norwegian government had no military presence in the area at the time. Eight South Koreans were among the 21 crewmembers being held hostage.

The South Korean government dispatched the Choe Yeong, under Captain Cho Young-joo, commander of the Cheonghae Anti-piracy Unit The Choe Yeong pursued the Samho Jewelry for nearly a week until the pirates aboard the tanker were fatigued. Several fake attacks were staged to exhaust the pirate crew. When some of the pirates left the ship to attempt another hijacking on a nearby Mongolian vessel, commandos from the Republic of Korea Naval Special Warfare Brigade boarded the Samho Jewelry while a Westland Lynx helicopter provided covering fire. Communications jamming was utilized to prevent the pirates from calling for assistance. The tanker was retaken with eight pirates killed and five captured. The captain of the Samho Jewelry survived a gunshot wound to the stomach while three navy personnel suffered "light scratches". The rest of the tanker crew were unharmed.

The Choe Yeong escorted the Samho Jewelry to Oman, where they docked at the port of Muscat on 31 January. The rescue was called "a perfect military operation" by Lieutenant General Lee Sung-ho of the Joint Chiefs of Staff of the Republic of Korea.

The ROKS Choe Yeong was diverted from anti-piracy operations in the waters off of Somalia to evacuate South Korean nationals stranded in Libya. The Choe Yeong successfully evacuated 32 South Korean nationals on 4 March and docked in the Maltese port of Valletta. The Choe Yeong will remain on standby near Libyan waters to support "further evacuation efforts."

Some biography about DDH-976: ROKS Munmu the Great

DDH-976 ROKS Munmu the Great is a Chungmugong Yi Sunshin-class destroyer in the South Korean navy. It was bestowed from the 30th Silla Dynasty Monarch; 1st King of the Unified Silla Dynasty, Munmu the Great a.k.a Kim Beop-min. This ship is launched in April 11th 2003, commissioned in September 30th 2004 and currently active in service, as of 2013.

ROKS Munmu the Great is one of the Chungmugong Yi Sunshin-class destroyers that involved in the Cheonghae Anti-Piracy Unit to curb piracy in the Gulf of Aden. That means the majority vessels for Cheonghae Anti-Piracy Unit are coming from the Chungmugong Yi Sunshin-class destroyers.

ROKS Munmu the Great was the first ship to be deployed as part of the unit to Somali waters on March 13, 2009. On April 17, it deterred pirates from boarding the cargo vessel Puma, which was registered in Denmark.On May 4, the Munmu the Great responded to a distress call by the North Korean merchant vessel Dabaksol. A Westland Lynx military helicopter was launched to protect the Dabaksol until the pirates had fled. The North Korean sailors thanked the members of the unit before proceeding to India. A member of the Joint Chiefs of Staff of the Republic of Korea stated, "This is the first time that the South Korean navy has rescued a North Korean cargo ship from a pirate’s attack. According to the international law of the sea, we should help all vessels regardless of their nationality."

Admiral's Choice, Chungmugong Yi Sunshin Class Destroyers: The Lead Ship, DDH-975 ROKS Chungmugong Yi Sunshin

Chungmugong Yi Sunshin class destroyers (Chungmugong Yi Sunshin-geup Guchuk-ham; Hangul/Hanja: 충무공 이순신급 구축함/忠武公李舜臣級驅逐艦) are multipurpose destroyers of the Republic of Korea Navy. The lead ship of this class, ROKS Chungmugong Yi Sunshin, was launched in May 2002 and commissioned in December 2003. The namesake of this class is bestowed from Chungmugong Yi Sunshin, the Joseonese Admiral who saved Korea-Joseon Dynasty from invading Toyotomi Hideyoshi's Japan Forces during the Imjin Invasion (1592-1598).

Chungmugong Yi Sunshin class destroyers were the second class of ships to be produced in the Republic of Korea Navy's destroyer mass-production program named Korean Destroyer eXperimental, which paved the way for the navy to become a blue-water navy. Six ships were launched by Hyundai Heavy Industries and Daewoo Shipbuilding & Marine Engineering in four years.

The ship has a 32-cell strike-length Mk 41 VLS for SM-2 Block IIIA area-air defence missiles, one 21-round RAM inner-layer defence missile launcher, one 30 mm Goalkeeper close-in weapon system, one Mk 45 Mod 4 127 mm gun, eight Harpoon anti-ship missiles and two triple 324 mm anti-submarine torpedo tubes.

Electronics suite includes one Raytheon AN/SPS-49(V)5 2D long-range radar (LRR), one Thales Nederland MW08 3D target indication radar (TIR), two Thales Nederland STIR240 fire-control radars with OT-134A Continuous Wave Illumination (CWI) transmitters, an SLQ-200(V)K SONATA electronic warfare system and a KDCOM-II combat management system which is derived from the Royal Navy Type 23 frigate's SSCS combat management system. BAE Systems WDS Mk 14 originally developed for the US Navy's New Threat Upgrade evaluates threats, prioritizes them, and engages them in order with SM-2.

On the 4th unit, DDH-978 ROKS Wang Geon, the 32-cell Mk 41 VLS is moved to the left and an indigenous VLS named K-VLS is installed on the right. The ship's forward part is spacious enough to take a 64-cell Mk 41 VLS.

The KDX-II is part of a much larger build up program aimed at turning the ROKN into a blue-water navy. It is said to be the first stealthy major combatant in the ROKN and was designed to significantly increase the ROKN's capabilities.  

General characteristics
Chungmugong Yi Sunshin Class Destroyer
4,400–5,520 tonnes (4,330–5,432 long tons) full load
150 m (492 ft 2 in)
17.4 m (57 ft 1 in)
9.1 m (31 ft 2 in)
2 × General Electric LM2500-30 gas turbines
2 CP propeller shafts
29 knots (54 km/h; 33 mph)
5,500 nmi (10,186 km; 6,329 mi) at 17 kn (31 km/h; 20 mph)
Sensors and
processing systems:
• AN/SPS-49(V) 2D air search radar
• Signaal MW 08 surface search radar
• Daewoo SPS-95k navigation radar
• 2 × Signaal STIR 240 Fire control radars
• ATLAS DSQS-21BZ Hull mounted sonar
Electronic warfare
& decoys:
• LIG Nex1 SLQ-200K Sonata electronic warfare suite
• 4 × KDAGAIE MK.2 Chaff Launchers
• 1 x 5 inch (127mm/L62) Mk-45 Mod 4 naval gun
• 1 x 30 mm Goalkeeper CIWS
1 x RAM Block 1 CIWS
• 32-cell Mk 41 VLS
   • SM-2 Block IIIA/IIIB
• 24-cell K-VLS
   • 8 x K-ASROC Red Shark in (VLS)
2 x 3 K745 LW Blue Shark torpedoes
2 × quadruple Harpoon missile canisters
4 x 4 SSM-700K Hae Sung anti-ship missiles
Aircraft carried:
2 × Super Lynx helicopters

First Korean-Made Destroyer Helicopter, King Gwanggaeto the Great Class: The Lead Ship, DDH-971 ROKS King Gwanggaeto the Great

The King Gwanggaeto the Great class destroyers (GwanggaetoDaewang-geup Guchuk-ham; Hangul/Hanja: 광개토대왕급 구축함/廣開土大王級驅逐艦), often called KDX-I class, are destroyers, but are classified by some as frigates, operated by the Republic of Korea Navy. It was the first phase of ROKN's KDX program, in moving the ROK Navy from a coastal defence force to a blue-water navy. The namesake of this class bestowed from King Gwanggaeto the Great, the 19th King of Goguryeo Dynasty who expanded Goguryeo Kingdom to nowadays Yanbian Korean Autonomous Province, People's Republic of China and Primorsky Krai, Russia.

The KDX-I was designed to replace the old destroyers in the ROKN that was transferred from the US Navy in the 1950s and 1960s. It was thought to be a major turning point for the ROKN in that the launching of the first KDX-I meant that ROKN finally had a capability to project power far from it shores. After the launching of the ship there was a massive boom in South Korean international participation against piracy and military operations other than war.

The primary weapon deployed by King Gwanggaeto the Great class vessels is the Super Lynx helicopter, which acts in concert with shipboard sensors to seek out and destroy submarines at long distances from the ships. The Gwanggaeto-class also carries a close-in anti-submarine weapon in the form of the Mark 46 torpedoes, launched from triple torpedo tubes in launcher compartments either side of the forward end of the helicopter hangar. A secondary anti-shipping role is supported by the RGM-84 Harpoon surface-to-surface missile, mounted in two quadruple launch tubes at the main deck level between the funnel and the helicopter hangar. For anti-aircraft self-defense the Gwanggaeto-class carries 16 RIM-7P Sea Sparrow. The Gwanggaeto-class also carries two 30mm Goalkeeper to provide a shipboard point-defense against incoming anti-ship missiles and aircraft. The main gun on the forecastle is an OTO Melara 127 gun.

The Gwanggaeto the Great class is powered by two General Electric LM2500-30 gas turbines and two SsangYong 20V 956 TB 82 diesel engines. The Gwanggaeto-class can reach a maximum speed of 30 knots.

All King Gwanggaeto the Great class destroyers were built by the Daewoo Heavy Industries Co., Inc. (now as Daewoo Shipbuilding and Marine Engineering) at Gohyeon-dong, Geoje, Southern Gyeongsang Province, South Korea. In 1989, Daewoo Heavy Industries began working on the 4,000-ton destroyer which is now secondary destroyer of the Korean navy, and the achievement was made through DSME's 100% design engineering for the first time in Korea.

General characteristics
Type: King Gwanggaeto the Great Class Destroyers
Displacement: 3,885–3,900 tonnes (3,824–3,838 long tons) full load
Length: 135.5 m (444 ft 7 in)
Beam: 14.2 m (46 ft 7 in)
Draft: 4.2 m (13 ft 9 in)
Propulsion: 2 × General Electric LM2500-30 gas turbines
2 × SsangYong 20V 956 TB 82 diesel engines
2 shafts
Speed: 30 knots (56 km/h; 35 mph)
Range: 4,500 nmi (8,300 km; 5,200 mi) at 18 kn (33 km/h; 21 mph)
Complement: 286
Sensors and
processing systems:
• AN/SPS-49(V) 2D air search radar
• Signaal MW 08 surface search radar
• Daewoo SPS-95k navigation radar
• 2 × Signaal STIR 180 Fire control radars
• ATLAS DSQS-21BZ Hull mounted sonar
Electronic warfare
& decoys:
• SLQ-25 Nixie towed torpedo decoy
• ARGOSystems AR 700 and APECS 2 ECM
• 4 × CSEE DAGAIE MK.2 Chaff Launchers
Armament: • 1 × OTO Melara 127 mm (5 inch)/54 gun
• 2 × Signaal 30 mm Goalkeeper CIWS
• 2 × quadruple Harpoon missile canisters
• 1 × Mk.48 mod2 VLS with 16 RIM-7P Sea Sparrow missiles
• 2 × triple 324 mm (12.8 in) torpedo tubes (Mark 46 torpedoes)
Aircraft carried: 2 × Super Lynx helicopters

Korean made AEGIS based Destroyer, King Sejong the Great Class: The Lead Ship, DDG-991 ROKS King Sejong the Great

The King Sejong the Great class destroyers (Sejongdaewang-geup Guchuk-ham or Hangul/Hanja: 세종대왕급 구축함/世宗大王級驅逐艦), also known as KDX-III, are guided missile destroyers of the Republic of Korea Navy. The lead ship was launched 25 May 2007, sponsored by Kwon Yang-sook, the First Lady of the Republic of Korea; the wife of the Late President Roh Moo-hyun at the time and was commissioned in December 2008. The second ship was commissioned in August 2010. As of 2010, the ROK Navy has committed itself to deploy three ships with an option for three more.

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 the Sejong the Great. Sejong the Great (Hangul/Hanja: 세종대왕/世宗大王) is the fourth king of the Joseon Dynasty of Korea. He is credited with the creation of the Korean alphabet, Hangul. The ship features the Aegis combat system (Baseline 7 Phase 1) combined with AN/SPY-1D multi-function radar antennae.

The King 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.

King Sejong the Great class destroyers' main gun is the 127mm/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 Sang-eo (Red Shark) anti-submarine rockets and 32 K745 LW Cheong Sang-eo (Blue Shark) torpedoes. Anti-ship capability is provided by 16 SSM-700K Hae Seong (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 IIIC (Guardian of the Northern Sky) cruise missile, which is similar to the U.S. Tomahawk.

King Sejong the Great class destroyers' are often compared to Arleigh Burke class and Atago class 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 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 has 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 ship in the world second only to Kirov class battlecruiser with 352 missiles. Another similarity to Arleigh Burke class 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 news agency 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.

General characteristics
Class & type: King Sejong the Great class destroyers
Displacement: 8,500 tons standard displacement
11,000 tons full load
Length: 165.9 m
Beam: 21.4 m
Draft: 6.25 m
Propulsion: 4 General Electric LM2500 COGAG;
two shafts,
100,000 total shaft horsepower (75 MW)
Speed: 30+ knots (56+ km/h)
Range: 5,500 nautical miles (10,200 km)
Complement: 300-400 crew members
Sensors and
processing systems:
  • AN/SPY-1D(V) multi-function radar
  • AN/SPG-62 fire control radar
  • DSQS-21BZ hull mounted sonar
  • MTeQ towed array sonar system
  • Sagem Infrared Search & Track (IRST) system
Electronic warfare
& decoys:
LIG Nex1 SLQ-200K Sonata electronic warfare suite
  • 1 x 5 inch (127mm/L62) Mk-45 Mod 4 naval gun
  • 1 x 30 mm Goalkeeper CIWS
  • 1 x RAM Block 1 CIWS
  • 4 x 4 SSM-700K Hae Sung anti-ship missiles
  • 80-cell Mk 41 VLS
    • SM-2 Block IIIB/IV
  • 48-cell K-VLS
    • 32 x Hyunmoo III land attack cruise missiles
    • 16 x K-ASROC Red Shark in (VLS)
  • 2 x 3 K745 LW Blue Shark torpedoes
Aircraft carried: • Hangar for two Super Lynx or SH-60 Seahawk, one more on landing pad