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South Korea Launches Advanced KSS-III Submarine Jang Yeong-sil

10/23/2025

Summary

ROKS Jang Yeong-sil Launched

On October 22, 2025, ROKS Jang Yeong-sil was launched at Hanwha Ocean's shipyard in Geoje.
The 3,600-ton, 89-meter vessel is the first of three KSS-III Batch-II submarines and will bolster the Navy's capabilities.
Developed entirely with domestic technology, Jang Yeong-sil features lithium-ion batteries to improve stealth and endurance.
Sea trials and evaluations will precede delivery in late 2027, as the KSS-III program advances South Korea's defense industry.

Summary

Hyundai Submarine Bid

Hyundai Heavy Industries of South Korea competes for Greece's €28 billion naval program by presenting submarine designs.
The program aims to replace aging submarines and boost Greece's maritime capabilities.
South Korea also competes for Canada's submarine contract against Germany's Type 212CD.
Canada's contest has narrowed to these two options, with South Korea promising rapid delivery.
Both programs seek to bolster NATO presence in the North Atlantic amid Russian submarine activity.

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ROKS Jang Yeong-sil Launched

On October 22, 2025, ROKS Jang Yeong-sil was launched at Hanwha Ocean's shipyard in Geoje.
The 3,600-ton, 89-meter vessel is the first of three KSS-III Batch-II submarines and will bolster the Navy's capabilities.
Developed entirely with domestic technology, Jang Yeong-sil features lithium-ion batteries to improve stealth and endurance.
Sea trials and evaluations will precede delivery in late 2027, as the KSS-III program advances South Korea's defense industry.

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