D
Naval ForcesSouth Korea

Sejong the Great Class (KDX-III Class)

DestroyerFielded 2008Pending verification
Naval ForcesKOR
Length 135.9 m
Identification silhouette. Not drawn to scale between entries.
Fact cardConfidence · Source
System
TypeDestroyer
Date of introduction2008
ProliferationOrigin country only
Crew350Med[1]
Hulls delivered3Hulls listed in the source cardMed[1]
Dimensions and weight
Length135.9 m446 ftMed[1]
Beam21 m69 ftMed[1]
Draft10.5 mMed[1]
Displacement (standard)7,773 tonsMed[1]
Displacement (full load)10,455 tMed[1]
Propulsion and performance
Propulsion4 x General Electric LM-2500Med[1]
Speed30 kt56 km/hMed[1]
Range9,260 km5,754 mi · 5,000 nmi5,000 nm at 14 knots; 4,500 nm at 20 knotsMed[1]
Protection
Active Protection System2 x 330-340 round Matra-Defense Dagaie Mark 2 decoy rocket launching systemMed[1]
Torpedo Decoy1 x AN/SLQ-25 Nixie torpedo decoy system and 1 x Prairie/Masker noise suppression systemMed[1]
EW1 x SLQ-200(V) SONATA EW systemMed[1]
NBC Water Washdown SystemYesMed[1]
Chaff/Flares4 x Mark 36 SRBOC chaff/flare launchers (6-barrel)Med[1]
Armament
Torpedo System: launcher2 x triple 324-mm Mk 32 tubesMed[1]
Torpedo System: torpedo nameBlue Shark ASW or Mark 46 Mod 5 torpedoesMed[1]
Torpedo System: basic load46Med[1]
Aircraft Facilities: aircraft2 x Super Lynx [carries Sea Skua ASM missiles or U.S. Mark 46, Mod. 5 ASW torpedoes].Med[1]
Armament1 x OTO Melara 127/64; 1 x Goalkeeper CIWS; 2 x Mark 41 VLS (80 Cells); Hyunmoo IIIMed[1]
Fire control
Gun Fire Control System Name1 x Mark 160 gun fire control systemsMed[1]
Missile Fire Control System Name3 x Raytheon SPG-62 MFCR systemsMed[1]
Multi-Phased Radar1 x Lockheed-Martin AN/SPY-1D(V) Aegis multi-phased radarMed[1]
Air Search Radar1 x STX Radar SPS-95K air search; 1 x Northrop Grumman SPW-9B air/surface search; 1 x Thales Nederland MW-08 air/surface searchMed[1]
Surface Search Radar1 x DRS SPS-67(V) surface searchMed[1]
Navigation Radar1 x Daewoo DTR-92 navigationMed[1]
Active and Passive Sonar1 x Lockheed Martin SQQ-89(V) underwater combat system w/SQS-53C bow-mountedMed[1]
Variants
Sejong the GreatCommissioned: 2008 Status: Active[1]
Yulgok Yi ICommissioned: 2010 Status: Active[1]
Seoae Ryu Seong-ryongCommissioned: 2012 Status: Active[1]
Weapons and payload options · 4Confidence · Source
1 x OTO Melara 127/64Naval Gun
Med[1]
Range
100 km62 mi · 54 nmi
Quantity
1
Type
Naval Gun
Caliber
127 mm
Rate of fire
40 rounds/min
1 x Goalkeeper CIWSClose-in-Weapon System (CIWS)
Med[1]
Range
0.4 km0 mi · 0 nmi
Quantity
1
Type
Close-in-Weapon System (CIWS)
Caliber
30 mm
Rate of fire
70 rounds/second (4,200 rounds/minute)
2 x Mark 41 VLS (80 Cells)Armament
Med[1]
Hyunmoo IIICruise Missile
Med[1]
Type
Cruise Missile
Length
6.25 m
Summary

The Sejong the Great-class, also known as KDX-III, are three guided missile destroyers of the Republic of Korea Navy (ROKN). The ROKN has deployed three ships with an option for three more which was taken up in December 2013.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
CompareShow on range mapJSON
Operators
South Korea
Sources
  1. Sejong the Great Class (KDX-III Class) South Korean Destroyer, U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)
    Published/updated 2026-03-20 · Tier 1 · checked 2026-10-10
Change log
  • 2026-10-10 Entry created from the Worldwide Equipment Guide (ODIN), bulk import