The Draken class (Dragon) was a submarine class built for the Swedish navy

Swedish Navy

The Royal Swedish Navy is the naval branch of the Swedish Armed Forces. It is composed of surface and submarine naval units – the Fleet – as well as marine units, the so-called Amphibious Corps .In Swedish, vessels of the Swedish Navy are given the prefix "HMS," short for Hans/Hennes...

 1960-1962. A total of five submarines was delivered and kept in service until the late 1980s when the more modern Näcken class submarine

Näcken class submarine

The Näcken class submarines, also known as the A14 type, were built for the Swedish Navy in the late 1970s. The boats were authorised in 1972 and the programme was completed in 1981. All boats were built by Kockums in Karlskrona. The boats had a teardrop hull and diving depth was 150m...

 replaced them. Four of the boats were modernised in 1981-82. The design was a modified version of the Hajen class

Hajen class submarine

The Hajen class was a submarine class built by Kockums and used by the Swedish navy. The design was influenced by the German Type XXI submarine class...

 with only one shaft with a larger 5-bladed propeller for improved underwater performance and reduced noise.

One submarine (HMS Nordkaparen) was preserved and can today been seen at the Göteborgs Maritima Center in Gothenburg

Gothenburg

Gothenburg is the second-largest city in Sweden and the fifth-largest in the Nordic countries. Situated on the west coast of Sweden, the city proper has a population of 519,399, with 549,839 in the urban area and total of 937,015 inhabitants in the metropolitan area...

.