 The first PKX-A(PKG) vessels were ordered from Hanjin Heavy Industries.The lead ship of the class, "Yoon Youngha" (PKG 711), named after Lieutenant Commander Yoon Youngha who was killed during the second battle of Yeonpyeong, was launched on June 28, 2007 and commissioned on December 17, 2008.The production of the PKX-A(PKG) are being divided between Hanjin Heavy Industries and STX in lots of four.