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Submarines1965–present
Midget submarine
Yono-class submarine is a midget submarine. It was built by Yukdaeso-ri Naval Shipyards. Reported operators include Korean People's Navy Islamic Republic of Iran Navy.
South KoreaAI-generated illustration · Not a photograph — Representative exterior of Yono-class submarine; geometry is illustrative. Not evidence for specifications.
ForceTally · AI-generated illustration · Not a photograph · AI-generated · OpenAI output terms · Source ↗ · ModifiedYono class
Yukdaeso-ri Naval Shipyards
Korean People's Navy Islamic Republic of Iran Navy
Yugo class
1965–present
10
36
36
<36 (most in reserve)
Midget submarine
120 tons submerged 76–95 tons surfaced
20–22 m (65 ft 7 in – 72 ft 2 in)
2.75 m (9 ft 0 in)
1.6 m (5 ft 3 in)
Single-shaft MTU diesel engine with electric drive
10–11 knots (19–20 km/h; 12–13 mph) surfaced 4–8 knots (7.4–14.8 km/h; 4.6–9.2 mph) submerged
550 nmi (1,020 km; 630 mi) surfaced 50 nmi (93 km; 58 mi) submerged
2 + 6 or 7 special forces personnel
2 × 533 mm (21 in) torpedo tubes Mines
A Yono-class submarine is thought to have fired the torpedo attack which sank a South Korean Pohang -class corvette , ROKS Cheonan on 26 March 2010 in South Korean waters.
Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
True scale
Sourced dimensions beside a 1.75 m human reference.
Points represent sourced observations, including revisions. Revisions on the same effective date are not separate inventory events. Ranges appear in the table and are not plotted as exact points.
| Observation / report period | Value | Source | Claim state |
|---|---|---|---|
| 28 Sept 2026 | 20–22 m | Wikipedia contributors | superseded |
| 28 Sept 2026 | 20–22 m | Wikipedia contributors | superseded |
| 28 Sept 2026 | 20–22 m | Wikipedia contributors | superseded |
| 28 Sept 2026 | 20–22 m | Wikipedia contributors | approved |
Yono-class submarine equipment records. Variants, orders and quantities are shown as reported in each inventory source; coverage is incomplete.
North KoreaReported count for Yono-class. Service scope: Korean People's Navy; does not replace a national total. 1 distinct count cell(s) from the same source list; shared rowspan cells counted once. Excludes retired/reserve/on-order rows. Count column(s): in service: 36. Origin: unstated. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.
Korean People's Navy Islamic Republic of Iran Navy
Equipment reference ↗