Yugo-class submarine

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Class overview
Name: Yugo class
Builders: Yukdaeso-ri shipyard
Operators:  Democratic People's Republic of Korea (former)
 Iran (current)
 Vietnam (current, to be decommissioned in 2012)
Succeeded by: Sang-O class
In commission: Late 1960s
Completed: 8
Active: 6
Lost: 1
Retired: 1
Preserved: none
General characteristics
Type: midget submarine
Displacement: 90 up to 110 tons (submerged)
Length: 20m
Beam: 2m
Propulsion: Single-shaft MTU diesel engine
Speed: 10 knots (19 km/h) surfaced
4 knots (7.4 km/h) submerged
Range: Unable to reach the southern extreme of South Korea
Capacity: 4-6 Special forces troops
Armament: Some armed with two 21-inch (530 mm) torpedoes, possibly in drop collars.
Notes: First successful indigenous midget submarine

The Yugo class submarine is a class of four midget submarines used primarily for infiltration and espionage by North Korea. The class is so named because it was built to plans supplied to North Korea by Yugoslavia in 1965. This class is a family of midget submarines which are not all identical. The displacement is either the standard 90 tons of the original Yugoslavian design for the early units, or 110 tons for the later units, while armament is either a pair of 400 mm torpedo tubes (early units) or a pair of 21 in short torpedo tubes (later units); however, all units have the same range: 550 nautical miles (1,020 km) at 10 knots (19 km/h) on the surface and 50 nautical miles (93 km) at 4 knots (7.4 km/h) submerged. Their final example was built in the 1980s, after which they were superseded by the Sang-O class submersibles. In 1998 one out of the 6 submarines was captured by the South Koreans. In July 2007, 4 were given to Iran to repay some of North Korea's debts to Iran, the last one was retired but kept by the North Koreans.

Export and foreign production[edit]

A variation of the Yugo class has been spotted in La Havana harbour, Cuba. Only a single vessel has been seen, it's currently unknown the actual amount of units and the key differences with the original Yugo. Rumored to be named "Delfin", it's unknown if has been built in North Korea, or in Cuba with Korean assistance.