Gumdoksuri (PCFG)

The Yoon Youngha-class patrol vessel (Hangul: 윤영하급 미사일고속함) also known as PKG-class patrol vessel is a class of patrol ship of the Republic of Korea Navy named after Yoon Young-ha. One variant is in active service and a smaller variant is planned. The first being the PKX-A or Yun Youngha-class missile patrol ship (Hangul: 윤영하급 고속함), and the second the PKX-B patrol boat (also known as Chamsuri-211-class patrol boat or Gumdoksuri-class patrol vessel).

The Gumdoksuri-class development program, known as the PKX project, was accelerated following the deadly Second Battle of Yeonpyeong in 2002 to provide South Korea with more heavily armed and survivable littoral combatants. The lead vessel, named after fallen commander Yoon Youngha, entered active service with the Republic of Korea Navy in 2008. Since their introduction, these high-speed craft have been heavily deployed along the disputed Northern Limit Line to deter North Korean maritime provocations. A total of 18 vessels of this class were commissioned, and they continue to serve as a vital component of South Korea's coastal defense network alongside the newer PKX-B class.