Chungmugong Yi Sunshin Class / DDH-II Class Destroyer, South Korea

Chungmugong Yi Sun-sin (DDH-975)

Chungmugong Yi Sun-sin class destroyers (Hangul: 충무공 이순신급 구축함, Hanja: 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 Sunsin, was launched in May 2002 and commissioned in December 2003. Chungmugong Yi Sun-sin-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  between 2002 and 2006. The destroyer class is also known as DDH-II.

The lead ship in its class, Chungmugong Yi Sunshin (DDH-975), was launched in May 2002 and commissioned in November 2003. Munmu the Great (DDH-976) was launched in April 2003 and commissioned in September 2004. Dae Jo Yeong (DDH-977) was launched in November 2003 and commissioned in June 2005. Wang Geon (DDH-978) was launched in May 2005 and commissioned in November 2006. Kang Gam Chan (DDH-979) was launched in March 2006 and commissioned in October 2007. The final ship in the class, Choi Young (DDH-981), was launched in October 2006 and commissioned in September 2008.

Chungmugong Yi Sunshin class destroyer design
Chungmugong Yi Sunshin Class uses improved sea-keeping hull design licensed from IABG of Germany. The hull incorporates stealth technology for reduced infrared and radar cross section.  The ship has high survivability and can protect the crew from biochemical attacks.
DDH-II Class has an overall length of 150m, a beam of 17m and a draft of 5m. The full load displacement of the ship is 4,800t. The vessel can complement a crew of 200 members.
Chungmugong Yi Sunshin Class destroyers are deployed in reconnaissance and surveillance, anti-submarine, air and surface warfare operations. The destroyer conducts strikes on the strategic and tactical targets and can also serve as a main warship of a manoeuvre warfare group.
The destroyer fleet improves the mission capability in the ocean by providing ship-centred long range anti-aircraft defence and zonal anti-aircraft defence.

ROKS Munmu the Great (DDH-976)

Command combat management system
The combat management system is based on SSCS Mk 7 developed by Alenia Marconi Systems. The system integrates 10 multi-functional consoles and related infrastructure. The SSCS Mk 7 receives information from shipboard sensors and performs threat evaluation, target prioritisation, engagement planning and launching of weapons.

Weapon Systems
The ships have 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.
The 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, 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.

Sensors / radars
The sensor suite includes a Raytheon AN/SPS-49(V)5 two-dimensional (2D) long- range search radar, a Thales Nederland MW08 G-band 3D target indication radar, two STIR240 fire-control radars, DSQs-21 hull mounted sonar and Daewoo towed array passive sonar.

ROKS Choe Yeong (DDH-981)

Electronic countermeasures
Electronic countermeasures are based on SONATA SLQ-200(V)K electronic warfare (EW) system developed by LIG Nex1.
The shipborne EW system detects the radio wave signals emitted by the enemy radars and missiles and simultaneously transmits jamming signals to defeat multiple threats for enhancing the survivability of naval ships.

Aircraft landing space
The destroyer class has a landing space for an anti-submarine helicopter Super Lynx. The embarked helicopter is deployed in anti-submarine operations as well as ground operations. A hangar facility is provided for the helicopter.

Propulsion
Chungmugong Yi Sunshin class is powered by combined diesel or gas (CODOG) propulsion integrating two LM2500 gas turbines and two MTU diesel engines. The engines, driving two controllable pitch propellers, deliver a total power output of 64,960shp. The propulsion system provides a maximum speed of 29kt and a cruising range of 4,000nm at 18kt speed.