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Republic of Korea Navy - ROKN Sejong the Great class (KDX-III) Guided Missile Destroyer |
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| 10/26 | ||
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Batch I: DDG-991 ROKS Sejong the Great (2008) DDG-992 ROKS Yulgok Yi I (2010) DDG-993 ROKS Seoae Ryu Seong-ryong (2012) Batch II: DDG-995 ROKS Jeongjo the Great (2024) DDG-996 ROKS Dasan Jeong Yak-yong (2026?) DDG-997 ROKS Daeho Kim Jong-seo (2027?) |
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| Specifications: | ||
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Displacement: Batch I: 7,650 tons (standard) / 10,000 tons (full load) Batch II: 8,200 tons (standard) / 12,000 tons (full load) Length: Batch I: 166 meters (544 feet 7 inches) Batch II: 170 meters (557 ft 9 in) Beam: 21.4 meters (70 ft 3 in) Draft: 6.25 meters (20 ft 6 in) Speed: 30+ knots (56+ km/h) Range: 5,500 NM (10,200 km) Complement: 300 Propulsion: COGAG (Combined Gas and Gas) 4 x General Electric LM2500 Gas Turbines 75,000 kW (100,000 shp) total power 2 shafts, 2 controllable pitch propellers Armament:
Aviation: flight deck & hangar for 2 helicopters (MH-60R Seahawk / AW159 Wildcat / Westland Super Lynx Mk.99) Systems: AEGIS Combat System (Baseline 7 Phase 1) AN/SPY-1D(V) multi-function radar AN/SPG-62 fire control radar DSQS-21BZ-M hull mounted sonar SQR-220K towed array sonar system Sagem Infrared Search & Track (IRST) system LIG Nex1 SLQ-200K Sonata electronic warfare suite |
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The Sejong the Great-class destroyers (Sejongdaewang-Geup Guchukam
or Hangul: 세종대왕급 구축함, Hanja: 世宗大王級驅逐艦), 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. Background: The ship features the Aegis Combat System (Baseline 7 Phase 1) combined with AN/SPY-1D multi-function radar antennae. The Sejong the Great class is the third phase of the South Korean navy's Korean Destroyer eXperimental (KDX) program, a substantial shipbuilding program, which is geared toward enhancing ROKN's ability to successfully defend the maritime areas around South Korea from various modes of threats as well as becoming a blue-water navy. At 8,500 tons standard displacement and 11,000 tons full load, the KDX-III Sejong the Great destroyers are by far the largest destroyers in the South Korean Navy, and indeed are larger than most destroyers in the navies of other countries. and built slightly bulkier and heavier than Arleigh Burke-class destroyers or Atago-class destroyers to accommodate 32 more missiles. As such, some analysts believe that this class of ships is more appropriately termed a class of cruisers rather than destroyers. KDX-III, Batch II are currently the largest ships to carry the Aegis combat system. Capabilities: Batch I features the Aegis Combat System (Baseline 7 Phase 1) combined with AN/SPY-1D(V) multi-function radar antennae. This gives the destroyers the ability to track missiles launched from anywhere in North Korea. This capability was demonstrated by the tracking of a North Korean missile in April 2009. The Sejong the Great-class destroyers are often compared to the Arleigh Burke and Atago classes because they utilize the AN/SPY-1D multi-function radar, and have similar propulsion and capabilities. One notable difference between the Sejong the Great-class ships and Arleigh Burkes is the number of VLS cells. Destroyers of the Sejong the Great class have a capacity of 128 missiles, as opposed to 96 on the Arleigh Burke class and the Japanese Atago-class destroyers. The Sejong the Great class is thus one of the most heavily armed ships in the world, with greater missile capacity than the Chinese People's Liberation Army Navy Type 055 destroyer (112 VLS cells). The Sejong the Great class is surpassed in VLS depth only by the Kirov-class battlecruiser with 352 missiles (entire missile load). Another similarity to Arleigh Burke Flight IIA and Atago-class destroyers is the presence of full facilities for two helicopters, a feature missing from earlier Arleigh Burkes and Kongō-class destroyers. BMD: In August 2016, press reports revealed that South Korea was considering adding the SM-3 interceptor to its Sejong the Great-class ships to enable them to perform ballistic missile defense in response to North Korean efforts to bolster offensive missile capabilities. This came months after the U.S. decision to deploy the THAAD missile interceptor system on mainland South Korea. The addition of SM-3s to the ships may require software and computer hardware upgrades. The following month, Aegis manufacturer Lockheed Martin confirmed the next three Sejong the Great vessels (Batch II) will be capable of performing "integrated air and missile defense" (IAMD) to supplement U.S. Army ground-based missile interceptors on the peninsula, likely being outfitted with the SM-3. While the first three destroyers are fitted with Aegis Baseline 7 based on older proprietary computers that can't carry out IAMD operations, the following three will be fitted with the Baseline 9 version of the Aegis Combat System that combines modern computing architecture to allow the AN/SPY-1D(V) radar to perform air warfare and BMD missions at the same time. At MADEX 2019, Lockheed Martin reported that the new ships will get Aegis Baseline 9.C2 with software variant "KII" and BMD baseline 5, which allows the use of SM-3 Block IB. The multifunction radar remains AN/SPY-1D(V). LIG Nex1's SPS-560K 3D radar will be used to guide K-SAAM. source: wikipedia |
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images for more images go to the individual ship's page |
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 DDG-991 ROKS Sejong the Great  DDG-992 ROKS Yulgok Yi I  DDG-993 ROKS Seoae Ryu Seong-ryong ARMAMENT + DETAILS  Mk.45 gun / Mk.41 VLS (48 cells) / RIM-116 RAM launcher  tube launchers (4x4) for SSM-700K Haeseong Anti-ship Missiles (SSM) / 2 x AN/SPG-62 fire control radar / Goalkeeper CIWS  RIM-116 RAM launcher / Mk.41 VLS (48 cells) / Mk.45 gun  32-cell Mk.41 VLS and 48-cell K-VLS, aft  tube launchers (4x4) for SSM-700K Haeseong Anti-ship Missiles (SSM) / 2 x AN/SPG-62 fire control radar / Goalkeeper CIWS  32-cell Mk.41 VLS and 48-cell K-VLS, aft  RIM-116 RAM launcher / Mk.41 VLS (48 cells) / Mk.45 gun  a RIM-66 Standard Missile SM-2MR was fired from the forward Mk.41 VLS  a RIM-116 Rolling Airframe Missile (RAM) was fired from the 21-cell launcher     |
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