KDDX-class destroyer

The Korean Next-Generation Destroyer (KDDX) is a next generation stealth guided-missile destroyer under development by Hyundai Heavy Industries for ROK Navy, to be launched after 2025. Displacement of the class is set to be about 8,000 tons, length 155 meters, breadth 18.8 meters and draft 9.5 meters. Will feature KVLS to launch Hyunmoo-3C land-attack cruise missiles and SSM-700K anti-ship missiles. At 8000 tons displacement, it will be lighter than Sejong the Great-class destroyers, but with more advanced sensors and stealth characteristics and lower operating costs. The ships will have advanced missile defense. The size  of  this  new  destroyer  would  be  between  that  of  the  currently operating 4,200-ton KDX-II and the Aegis Destroyer KDX-III, and would be assigned to a naval task force. The total cost of developing and producing the six vessels is expected to top $6.2 billion.

History
The project was unveiled back in 2009 next-generation during the 2009 Navy Audit and was supposed to be equipped with SM-2 surface-to-air missiles and SPY-based radars that would slot in between the Chungmugong Yi Sun-sin-class destroyer (KDX-II) and Sejong the Great-class destroyer (KDX-III).

In 2012, it was again confirmed that the Republic of Korea Navy would procure six next-generation destroyers and the project being renamed from KDX-IIA to KDDX in the Basic Plans for Defense Reform (2012-2030) and that it would be built after 2020. But by 2013, it was decided to procure three more destroyers under a new subclass of the Sejong the Great-class destroyer named KDX-III Batch II (Jeongjo the Great) and the funding and priority allotted for the KDDX was shifted to the new batch of AEGIS-equipped destroyers.

In 2018, the 118th Defense Program Promotion Committee approved the Basic Strategy for the Promotion of the Korean Next Destroyer (KDDX) Project and by 2019, work began on its initial basic design and its development.

During MADEX 2019, both HD Hyundai Heavy Industries and Hanwha Ocean (then known as Daewoo Shipbuilding & Marine Engineering) displayed their proposal for the KDDX program.