Chungmugong Yi Sun-sin-class (KDX-II)

The Chungmugong Yi Sun-sin-class is a series of six multipurpose destroyers operated by the Republic of Korea Navy. Developed under the Korean Destroyer eXperimental (KDX-II) program, the class succeeded the Gwanggaeto the Great-class. Hyundai Heavy Industries and Daewoo Shipbuilding & Marine Engineering constructed the vessels between 2002 and 2006. The lead ship, ROKS Chungmugong Yi Sun-sin, entered service in 2003.

The design incorporates stealth features and is intended for multipurpose operations. Sensor and electronic systems include the Raytheon AN/SPS-49(V)5 2D long-range radar, Thales Nederland MW08 3D radar, and the KDCOM-II combat management system, which is derived from the technology used in the Royal Navy Type 23 frigate. Threat evaluation and engagement prioritization are managed by the BAE Systems WDS Mk 14. Primary armament consists of a naval gun, Goalkeeper and RAM close-in weapon systems, and anti-ship missiles. Vertical launching systems include the Mk 41 VLS for surface-to-air missiles and the indigenous K-VLS, introduced starting with the fourth unit, ROKS Wang Geon, for anti-submarine and land-attack cruise missiles. In 2024, the Defense Acquisition Program Administration announced a Product Improvement Project (PIP) to be completed by 2033. This program focuses on replacing the combat information system, 3D radar, and sonar systems to address component obsolescence.

Operational history includes international exercises and maritime security missions. ROKS Munmu the Great participated in RIMPAC 2006, while ROKS Choe Yeong was involved in the "Invincible Spirit" joint exercise. ROKS Wang Geon served with the Cheonghae Unit and conducted non-combatant evacuation and diplomatic missions off the coast of Yemen in 2015.