Full Breakdown
South Korea Launches First KSS-III Batch-II Submarine
10/23/2025, 1:09:19 AM
Overview of the Launch Event
On October 22, 2025, the Republic of Korea Navy (ROKN) launched the ROKS Jang Yeong-sil, the first submarine of the KSS-III Batch-II class, at Hanwha Ocean's shipyard in Geoje. This event marks a significant milestone in South Korea's submarine capability development, which has evolved over three decades through the KSS program phases: KSS-I, KSS-II, and now KSS-III. The ROKS Jang Yeong-sil, displacing approximately 3,600 tons and measuring 89 meters in length, is designed to enhance the Navy's strategic deterrence capabilities.
Key Features and Technological Advancements
The ROKS Jang Yeong-sil incorporates several advanced features compared to its predecessors. It is equipped with lithium-ion batteries that allow for extended underwater operations and high-speed maneuvers, significantly reducing detection risks. The submarine's combat and sonar systems have been upgraded to improve information processing and target detection capabilities. Additionally, it boasts an expanded vertical launch system (VLS) with ten cells, compared to six in the earlier Batch I models, enhancing its strike capabilities.
The submarine is also notable for its high degree of automation, enabling operation by a reduced crew of 33, expandable to 55 if necessary. The inclusion of 12 newly developed domestic systems brings the total number of localized components to 70, reinforcing South Korea's technological independence amid export restrictions.
Official Statements & Responses
Admiral Kang Dong-gil, Chief of Naval Operations, emphasized the significance of the ROKS Jang Yeong-sil, stating, "I am confident that the Jang Yeong-sil, built with our own technology, will serve as a signal flare for the Navy’s leap toward becoming a smart, elite force." Lee Sang-woo, Director General of the KSS-III Submarine Project Team at the Defense Acquisition Program Administration (DAPA), highlighted the submarine as a culmination of advanced scientific and technological excellence, representing the Korean defense industry.
Global Context and Competition
The launch of the ROKS Jang Yeong-sil occurs amid South Korea's increasing prominence in the global arms market, particularly in submarine technology. Hyundai Heavy Industries (HHI) is actively competing for contracts in Greece's naval modernization program, which aims to replace older submarines and enhance maritime capabilities. HHI's involvement in the KSS-III program, along with Hanwha Ocean's offerings, positions South Korea as a significant player in international defense partnerships.
What's Next for the ROKS Jang Yeong-sil
Following its launch, the ROKS Jang Yeong-sil will undergo a series of sea trials and evaluations before its official delivery to the ROK Navy, expected at the end of 2027. This submarine is anticipated to play a crucial role in safeguarding South Korea's maritime sovereignty and enhancing its defense capabilities in the region.
Criticism & Opposition
While the advancements in South Korea's submarine technology are notable, there are concerns regarding the regional arms race and the potential for increased tensions in Northeast Asia. Critics argue that the focus on expanding military capabilities could exacerbate security dilemmas with neighboring countries, particularly North Korea.
Verbatim Quotes
- “Lee Sang-woo, Director General of the KSS-III Submarine Project Team at the Defense Acquisition Program Administration (DAPA), stated: The ROKS Jang Yeong-sil is a world-class diesel-electric submarine and a culmination of advanced scientific and technological excellence representing Korean Defense Industry.” — Lee Sang-woo, Director General of the KSS-III Submarine Project Team at DAPA
