US Modernization Program for South Korea’s KDX-II Destroyers Approved.

According to information published by the DSCA on December 16, 2024, the United States State Department has approved a potential $300 million Foreign Military Sale to the Republic of Korea (ROK) for a comprehensive upgrade of its KDX-II class destroyers. The Defense Security Cooperation Agency (DSCA) has notified Congress of the proposed sale, which aims to address critical obsolescence issues and ensure the operational viability of these vessels.
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South Korean Chungmugong Yi Sun-sin-class (KDX-II) destroyer ROKS Chungmugong Yi Sun-sin. (Picture source: US DoD)

The Republic of Korea’s request includes modifications to the MK 99 fire control system, updates to the Weapon Direct System software, integration and installation of these enhancements, and a range of logistical and technical support. Personnel training, technical documentation, and engineering assistance from U.S. government and contractors are also part of the package. These upgrades are designed to sustain the ships’ capabilities in anti-surface and anti-air warfare missions, enhancing South Korea’s maritime defenses against regional threats.

The enhancements will not introduce new military capabilities but will ensure the KDX-II destroyers remain effective by addressing aging hardware and required software updates. The DSCA has emphasized that this program will not alter the regional military balance, focusing instead on maintaining South Korea’s existing naval strength. The upgrade program will be led by principal contractors, including BAE Systems, Inc., Integrated Defense Solutions in Maryland.

Republic of Korea Navy

The Korean Destroyer eXperimental (KDX) program is a significant initiative by the Republic of Korea Navy (ROKN) to establish a modern, blue-water fleet capable of addressing evolving security challenges in the region. This program has evolved through multiple phases, introducing increasingly advanced classes of destroyers. Among these, the KDX-II destroyers, officially known as the Chungmugong Yi Sun-sin-class, represent a crucial step in South Korea's naval development.

The KDX-II destroyers, introduced in the early 2000s, are multipurpose vessels displacing approximately 5,500 tons. These ships feature enhanced stealth capabilities, advanced weaponry, and sophisticated combat systems, marking an advancement over their predecessors. Six ships of this class were commissioned between 2003 and 2008, enhancing the ROKN's surface combatant fleet. Their armament includes anti-aircraft, anti-ship, and anti-submarine weapons, supported by sensors and communication systems.

In recent years, South Korea has undertaken modernization efforts to maintain the operational relevance of its KDX-II destroyers. The Performance Improvement Project (PIP) addresses system obsolescence and upgrades key technologies, including radar and combat information systems. Hanwha Systems has been contracted to execute these upgrades, with completion expected by 2033.