The Nongo class is a term used by the US Department of Defense to identify a series of new medium-size warships built by North Korea starting in the 2000s.

[2] In late 1980s the North Korean shipbuilding industry experimented with a large warship with an innovative catamaran-hull design, the Soho-class frigate.

North Koreans implemented the catamaran design, adopting Surface Effect Ship technology.

Considering the lack of official north Korean released data, most of features, design and details are speculations of analysts after observation of satellite pictures.

In January 2015 the first pictures of a vessel (of the stealth sub-class), employed in testing a reversed-engineered missile Kh-35, were released by KCNA.