Yugo-class submarine

The Yugo class was given its name because it was built to plans supplied to North Korea by Yugoslavia in 1965.[citation needed] All units have the same range: 550 nautical miles (1,020 km; 630 mi) at 10 knots (19 km/h; 12 mph) on the surface and 50 nautical miles (93 km; 58 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged.[citation needed] The final vessel was built in the 1980s, after which they were superseded by the Sang-O-class submarines.[2][3] In the early 2000s, Vietnam "gained experience" with these craft prior to ordering Russian Kilo-class diesel-electric submarines for denial of area capabilities, specifically against China's fleet per the Foreign Policy Research Institute.[4] In March 2016, it was announced that the North Korean Navy had lost one of the ships during exercises.
Sang-O classMidget submarinespecial forcestorpedoesdrop collarsmidget submarinesNorth KoreaYugoslaviadisplacementtorpedo tubesnautical milesSang-O-class submarinescaptured by the South KoreansKilo-classexercisesVietnamVietnam People's NavyUna-class submarineCBS NewsReutersThe Independent