Submarines
| Type | Class | Country of Origin | In Service | Notes |
|---|---|---|---|---|
| Diesel-electric coastal submarine | Sang-O class | Democratic People's Republic of Korea | 40+ | Manufactured in two variants, 34m Sang-O and 39m Sang-O II |
| Diesel-electric midget submarine | Yono class | Democratic People's Republic of Korea | ~10 | |
| Diesel-electric submarine | Type-033 (Romeo) class | People's Republic of China/ Soviet Union/ Democratic People's Republic of Korea | <22 | KPA Journal reports that these are being phased out in favor of Sang-O/Sang-O II |
| Diesel-electric submarine | Whiskey class | Soviet Union | 4 (reported retired as of March 2011) | KPA Journal reports that these have been retired and/or scrapped |
Note: According to http://news.bbc.co.uk/nol/shared/bsp/hi/pdfs/20_05_10jigreport.pdf, "The North Korean military is in possession of a fleet of about 70 submarines, comprised of approximately 20 Romeo class submarines (1,800 tons), 40 Sang-O class submarines (300 tons) and 10 midget submarines including the Yeono class submarines (130 tons)."
Read more about this topic: List Of Active North Korean Ships