circumnavigated the world for the first time. On March 24, 1995, President Kim Young-sam affirmed that the Navy should have the Task Fleet and pave the way for a new era of blue-water navy when speaking at the Naval Academy's graduation. On April 1, 1995, Admiral An Pyong-tae, the 20th Chief of Naval Operations, reaffirmed that the Navy should prepare to build the blue-water navy in his inaugural address. President Kim supported the Navy by approving a long-term shipbuilding plan for the ocean-going navy. In 1999, the Navy presented its strategic vision for the 2020s as "Navy Vision 2020" that outlined the Navy's future Task Fleet, which includes light aircraft carriers and ballistic missile submarines. At the same time, the ROK Navy has been steadily upgrading its naval forces: As part of the plan to strengthen the surface combatant forces, ROKS Kwanggaeto the Great (DDH 971), the ROK Navy's first locally built destroyer, was launched in 1996; the Kwanggaeto the Great-class destroyers replaced the aged former USN and Gearing-class destroyers. For building submarines forces, the ROK Navy acquired its first submarine (excluding midget submarines) ROKS Chang Bogo (SS 061) from Germany in 1992. The following eight Chang Bogo-class submarines were built in Korea. In order to replace the aged S-2 Trackers, Lockheed P-3C Orion maritime patrol aircraft were delivered to the ROK Navy from 1995. In June 1993, the ROK Navy Headquarters was relocated from Seoul to the Gyeryongdae complex, the tri-service headquarters in Gyeryong. In November 1999, the ROK Navy completed the construction of Pyeongtaek Naval Operations Base; Commander Second Fleet was relocated from Incheon Naval Base to the newly established base with an operational headquarters. In October 1998, the ROK Navy hosted its first International Fleet Review in commemoration of the 50th anniversary of the Republic of Korea and its armed forces off coast of Busan and Jinhae. About 60 ships from 12 countries participated in the fleet review including the South Korean navy. In June 1999, the ROK Navy forces engaged the North Korea naval forces near the Northern Limit Line (NLL) in the vicinity of Yeonpyeong Island. In June 2002, the two navies engaged again in the same vicinity resulting in the sinking of ROKS Chamsuri 357 (PKM 357). 2000s The ROK Navy continues to put its efforts to build the blue-water navy. In March 2001, President Kim Dae-jung revealed that the Navy will establish the