
The 882.1 billion won ($617 million) deal ends a shipbuilder dispute that delayed the program by two years. The destroyer uses a domestically developed combat system and phased-array radar. Delivery is scheduled for 2032.
South Korea's arms procurement agency signed a contract with Hanwha Ocean on Friday for the detailed design and construction of the first KDDX next-generation destroyer, ending a nearly three-year shipbuilder dispute that had stalled the program.
The deal, valued at about 882.1 billion won ($617 million), moves the lead ship into full design and construction. Delivery to the South Korean Navy is scheduled by the end of 2032, the Defense Acquisition Program Administration said.
The KDDX will be South Korea's first large destroyer built with a domestically developed hull, combat management system, multifunction radar and other core weapons systems. The vessel is sometimes described locally as a Korean-style Aegis destroyer, but it will not use the U.S.-developed Aegis Combat System. Instead, it combines a South Korean integrated combat system with an indigenous phased-array radar.
The entire six-ship program is expected to cost about 7.8 trillion won ($5.46 billion). The government has not determined which companies will build the five follow-on ships or how those contracts will be awarded.
How the Shipbuilder Fight Ended
Hanwha Ocean, formerly Daewoo Shipbuilding and Marine Engineering, completed the KDDX conceptual design. HD Hyundai Heavy Industries later conducted the basic design, leading to expectations that it would receive a negotiated contract for the detailed design and lead ship.
Hanwha Ocean instead called for a competitive bidding process, citing a military-secrets case involving HD Hyundai Heavy Industries employees. The acquisition agency accepted that request and held a competition.
The two shipbuilders were separated by less than 0.6 point in the final evaluation. A 1.2-point security penalty imposed on HD Hyundai Heavy Industries was considered decisive. Employees of the company had been convicted of photographing or improperly handling military secrets related to the KDDX program.
Hanwha Ocean was selected as the preferred bidder on June 11. HD Hyundai Heavy Industries challenged the evaluation, but its objection was rejected in early July. Negotiations between the acquisition agency and Hanwha Ocean then led to Friday's final agreement.
The contract was signed before all cost data were finalized. The final value may be adjusted to reflect verified construction expenses, the agency said.
Ship Specifications and Technology
The KDDX is expected to displace about 7,000 tons when lightly loaded, making it larger than South Korea's Chungmugong Yi Sun-sin-class destroyers but smaller than the Navy's Aegis-equipped Sejong the Great and Jeongjo the Great classes.
The ship features a low-observable design and an integrated mast intended to reduce its radar signature. Planned armament includes a 5-inch naval gun and South Korean vertical launch systems capable of carrying surface-to-air, anti-ship, land-attack and anti-submarine weapons. The exact number of vertical launch cells has not been officially confirmed.
The acquisition agency said major systems, including the combat management system, sonar, multifunction phased-array radar and ship-launched surface-to-air missiles, will be developed domestically.
South Korea plans to apply technologies developed since the basic design was completed, including digital-twin construction, layered counter-drone defenses and a communications environment using 5G and integrated wired and wireless networks. A digital twin is a computerized replica of the ship that can be used to test design changes, construction procedures and equipment performance before work is carried out on the physical vessel.
The Navy is also considering integrated electric propulsion to reduce noise and improve anti-submarine survivability. Automation is expected to reduce the number of sailors required to operate the ship compared with older destroyer classes.
Schedule Pressure After Delay
The KDDX basic design was completed in December 2023. Detailed design and lead ship construction were originally expected to begin soon afterward, but disputes between Hanwha Ocean and HD Hyundai Heavy Industries delayed the program by about two years.
The acquisition agency and Hanwha Ocean will now need to shorten portions of the development and construction schedule to meet the 2032 delivery target.
Jung Jae-jun, head of the acquisition agency's force resources division, described KDDX as a national project bringing together South Korea's shipbuilding and defense capabilities. He said the government would examine several options for the construction of the follow-on vessels while seeking to deploy the new destroyers on schedule. The program could also strengthen the international competitiveness of South Korean naval vessels, Jung said.
Hanwha Ocean previously said it felt a significant responsibility after being selected as the preferred bidder and would work with the government to normalize the delayed program.
Competition between Hanwha Ocean and HD Hyundai Heavy Industries is expected to continue as the government determines how to award contracts for the five remaining destroyers.
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