A guided-missile destroyer (DDG) is a destroyer whose primary armament is guided missiles so they can provide anti-aircraft warfare screening for the fleet. The NATO standard designation for these vessels is DDG, while destroyers who have a primary gun armament and/or a small number of anti-aircraft missiles sufficient only for point-defense are designated DD. Nations vary in their use of destroyer D designation in their hull pennant numbering, either prefixing or dropping it altogether.
The Republic of Korea Navy, also known as the ROK Navy or South Korean navy, is the naval warfare service branch of the South Korean armed forces, responsible for naval and amphibious operations. The ROK Navy includes the Republic of Korea Marine Corps, which functions as a branch of the Navy. The ROK Navy has about 70,000 regular personnel including 29,000 Republic of Korea Marines. There are about 160 commissioned ships in the ROK Navy. The naval aviation force consists of about 70 fixed-wing and rotary-wing aircraft. The ROK Marine Corps has about 300 tracked vehicles including assault amphibious vehicles.
Chungmugong Yi Sun-sin class destroyers are multipurpose destroyers of the Republic of Korea Navy. The lead ship of this class, ROKS Chungmugong Yi Sunsin, was launched in May 2002 and commissioned in December 2003. Chungmugong Yi Sun-sin-class destroyers were the second class of ships to be produced in the Republic of Korea Navy's destroyer mass-production program named Korean Destroyer eXperimental, which paved the way for the navy to become a blue-water navy. Six ships were launched by Hyundai Heavy Industries and Daewoo Shipbuilding & Marine Engineering in four years.
The Sejong the Great-class destroyers, also known as KDX-III, are three guided missile destroyers of the Republic of Korea Navy (ROKN).
The Gwanggaeto the Great-class destroyers, often called KDX-I, are destroyers, but are classified by some as frigates, operated by the Republic of Korea Navy. It was the first phase of ROKN's KDX program, in moving the ROK Navy from a coastal defence force to a blue-water navy.
The Dokdo-Class Amphibious Assault Ship is a class of landing platform helicopter (LPH) amphibious assault ships operated by the Republic of Korea Navy (ROKN). Designed by Hanjin Heavy Industries (HHIC), the requirements for the amphibious landing ships were to enhance South Korea's amphibious operation capability, both in terms of assault and military operations other than war (MOOTW).
The Hyunmoo-3 is a cruise missile fielded by the South Korean military designed by Agency for Defense Development (ADD). The name Hyunmoo comes from a mythical beast described as the "Guardian of the Northern Sky", perhaps hinting North Korea.
ROKS Munmu the Great (DDH-976) is a Chungmugong Yi Sun-sin-class destroyer in the South Korean navy. It was named after the Korean king Munmu of Silla.
The Hong Sang Eo torpedo, also called the K-ASROC, is a vertically launched anti-submarine missile successively developed and tested by South Korea's University of Science and Technology, the Korea Agency for Defense Development (ADD) and the Republic of Korea Navy in 2009. The Red Shark missile has a range of 12 miles (19 km) and carries a K745 Blue Shark torpedo that is deployed by parachute near the intended target. After release, the Blue Shark independently searches for the target.
The SSM-700K C-Star (Haeseong) is a ship-launched sea-skimming surface-to-surface anti-ship cruise missile developed by the South Korean Agency for Defense Development (ADD), LIG Nex1 and the Republic of Korea Navy in 2003. The missiles are deployed on KDX-II and KDX-III destroyers as of 2006, each carrying 8 and 16 of the missiles respectively, and on Ulsan-class frigates.
ROKS Chungmugong Yi Sun-sin (DDH-975) is a Chungmugong Yi Sun-sin-class destroyer in the Republic of Korea Navy. She is named after the ancient Korean admiral Yi Sun-sin with his posthumous name, Chungmugong, literally “Lord of Loyal Valor”.
KDDX-class destroyer (KDX-IV) is a stealthy destroyer class under development by Hyundai Heavy Industries for ROK Navy, to be launched after 2025. Displacement of the class is set to be about 8,000 tons, length 155 meters, breadth 18.8 meters and draft 9.5 meters. Will feature KVLS to launch Hyunmoo-3C land-attack cruise missiles and SSM-700K anti-ship tactical cruise missiles. At 8000 tons displacement, it will be lighter than Sejong the Great-class destroyers, but with more advanced sensors and stealth characteristics and lower operating costs. The ships will have advanced missile defense. The size of this new destroyer will be between that of the currently operating 4,200-ton KDX-II and the Aegis Destroyer KDX-III, and will be assigned to a naval task force. The total cost of developing and producing the six vessels is expected to top $6.2 billion.
ROKS Sejong the Great (DDG-991) is the lead ship of the her class of guided missile destroyer built for the Republic of Korea Navy. She was the first Aegis-built destroyer of the service and was named after the fourth king of the Joseon dynasty of Korea, Sejong the Great.
ROKS Yulgok Yi I (DDG-992) is the second ship of the Sejong the Great-class destroyers that was built for the Republic of Korea Navy. She was designed around the Aegis Combat System and was named after philosopher and scholar of the Joseon Dynasty, Yulgok Yi I.
ROKS Dae Jo-yeong (DDH-977) is a Chungmugong Yi Sun-sin-class destroyer in the Republic of Korea Navy. She is named after Dae Jo-yeong.
ROKS Wang Geon (DDH-978) is a Chungmugong Yi Sun-sin-class destroyer in the Republic of Korea Navy. She is named after Wang Geon.
ROKS Gang Gam-chan (DDH-979) is a Chungmugong Yi Sun-sin-class destroyer in the Republic of Korea Navy. She is named after Gang Gam-chan.
ROKS Gwanggaeto the Great (DDH-971) is the lead ship of the Gwanggaeto the Great-class in the Republic of Korea Navy. She is named after Gwanggaeto the Great.
ROKS Eulji Mundeok (DDH-972) is the second ship of the Gwangaetto the Great-class in the Republic of Korea Navy. She is named after Eulji Mundeok.
ROKS Yang Man-chun (DDH-973) is the third ship of the Gwangaetto the Great-class in the Republic of Korea Navy. She is named after Yang Man-chun.
South Korea 
