Korean Destroyer eXperimental

KDX (Korean Destroyer eXperimental) is a substantial shipbuilding program embarked on by the Republic of Korea Navy.

It is a three-phased program consisting of three individual classes of ships:
 * KDX-I (3,800 tons),
 * KDX-II (5,500 tons),
 * Aegis-equipped KDX-III (11,000 tons).
 * KDX-IIA, planned derivative of KDX-II with Aegis combat system (5,500 ~ 7,500 tons)