South Korea's first Aegis-equipped guided missile destroyer, displacing 11,000 tonnes full load — the largest surface combatant in the Republic of Korea Navy and one of the most powerful destroyers in the Asia-Pacific. Features the Lockheed Martin AN/SPY-1D(V) phased array radar and Aegis Weapon System Baseline 7, providing simultaneous tracking of over 900 targets and engagement of multiple threats. Armed with 128 VLS cells: 48-cell Mk 41 for SM-2 Block IIIB SAMs, 48-cell K-VLS for Hyunmoo-3C cruise missiles and K-ASROC anti-submarine rockets, plus 32-cell K-VLS for Haegung SAMs. Also carries 16x SSM-700K Haeseong anti-ship missiles, 1x Mk 45 Mod 4 127mm gun, CIWS, and torpedo tubes. Can embark 2x Super Lynx helicopters. Three ships in class: Sejong the Great (DDG-991), Yulgok Yi I (DDG-992), and Seoae Ryu Seong-ryong (DDG-993).
![Hyundai Rotem logo](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="60" viewBox="0 0 200 60"><rect width="200" height="60" fill="%23111"/><text x="100" y="38" font-family="Arial" font-weight="bold" font-size="14" fill="%23c8a84b" text-anchor="middle">HYUNDAI ROTEM</text></svg>)
- 128-cell Mk41 VLS massive magazine
- AN/SPY-1D Aegis-capable radar
- SM-3 BMD capable
- SM-6 for long-range IAMD
- Largest Asian surface combatant
- 11000t high operating cost
- AN/SPY-1D aged vs modern AESA
- US ITAR on Aegis systems
- Only 3 ships in KDX-III Batch I
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