HSwMS Gotland (Gtd) is a defense submarine of the Swedish Navy. It was the first ship of the Gotland-class, which was the first operational submarine class in the world to use air-independent propulsion in the form of Stirling engines which use liquid oxygen and diesel as the propellant.
HSwMS Sjölejonet was the lead ship of a class of nine naval submarines in the service of the Swedish Navy from just before World War II into the early Cold War. The submarines were ordered in response to the rising German threat to the south in the interwar period. Sjölejonet remained in service until 1959 and was sold for scrap in 1962.
HSwMS Småland (J19) is a Swedish Halland-class destroyer. She and HSwMS Halland were the only ones built of their class. Two more ships were ordered but they were never completed.
The Gotland-class submarines of the Swedish Navy are modern diesel-electric submarines, which were designed and built by the Kockums shipyard in Sweden. They are the first submarines in the world to feature a Stirling engine air-independent propulsion (AIP) system, which extends their underwater endurance from a few days to weeks. This capability had previously only been available with nuclear-powered submarines.
HSwMS Orion (A201) is a signals intelligence gathering vessel of the Swedish Navy.
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 1980 . All boats were built by Kockums in Karlskrona. The boats had a teardrop hull and diving depth was 150 metres (490 ft). Between 1987 and 1988 Näcken was cut in half and an 8-metre (26 ft) long hull section containing a prototype Air-independent propulsion (AIP) using a closed cycle Stirling engine was installed between the aft battery/propulsion & power control room and the engine/motor room. This technology increased underwater endurance to 14 days and has been adopted in subsequent Swedish submarines.
The Draken class (Dragon) was a submarine class built for the Swedish Navy from 1960 to 1962. A total of six submarines were delivered. Four of the boats were modernised in 1981–82. The design was a modified version of the Hajen-class with only one shaft with a larger 5-bladed propeller for improved underwater performance and reduced noise. Draken, Vargen, Nordkaparen and Springaren were ordered from Kockums. Gripen and Delfinen were from Karlskrona. These boats were decommissioned 1988-90 and were succeeded by the Sjöormen-class and Näcken-class submarines.
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. A total of 6 submarines were built in 1954-1958 and were kept in service until 1980.
HSwMS Näcken is the lead ship of her class of submarine for the Swedish Navy. She was launched at the Kockums shipyard in Malmö, Sweden, on 17 April 1978, and completed and commissioned into the Swedish Navy in April 1980. From 2001 to 2005, the submarine was leased to the Royal Danish Navy and operated as HDMS Kronborg (S325). She was restored to her original name of Näcken upon her return to Swedish control. She was scrapped in Karlskrona during 2015–2016.
The Visby class was a Swedish World War II destroyer class. During the years 1942–1944 four ships, Visby, Sundsvall, Hälsingborg and Kalmar, were built and delivered to the Swedish navy. The ships were a part of Sweden's military buildup during the war. Under this period the ships were used as neutral guards and escort ships. In 1965 the ships were modified and rebuilt as frigates. Two of the ships were decommissioned in 1978 and the last two followed in 1982.
The Klas class, also referred to as the Klas Horn class, was a pair of destroyers in service with the Swedish Navy from 1932 to 1958. They are sometimes considered part of the preceding Ehrensköld-class destroyers. Two ships in the class was constructed between 1930 and 1932, HSwMS Klas Uggla and HSwMS Klas Horn. The ships were involved in the Hårsfjärden disaster in 1941, in which both ships were damaged. Klas Uggla was raised but decommissioned, Klas Horn was repaired and continued to serve in the navy until 1958.
The Romulus class was a class of two destroyers operated by the Royal Swedish Navy during the Second World War. The class consisted of HSwMS Romulus and HSwMS Remus. They were built in Italy as the Spica-class torpedo boats Spica and Astore in the mid-1930s and sold to Sweden in 1940. The two ships were adapted for northern conditions and remained in service during World War II and into the first decades of the Cold War. They were modernized and re-designated as anti-submarine frigates in 1953. Both ships were discarded in 1958.
HSwMS Neptun is the second of three Näcken-class submarines, built to operate in the Baltic. Neptun entered service in December 1980. The next year she was involved an international incident when the Soviet submarine U 137 ran aground outside Karlskrona.
The Audaz class was a class of nine destroyers built for the Spanish Navy after the Second World War. Construction was slow, with only four completed to the original design from 1953–1956. The remaining five ships completed as anti-submarine escorts with a new armament and sensor fit from 1960 to 1965, while the original four ships were also modified to this standard. Built at Ferrol, they completed in 1946–1950 and were rated as gunboats, and were redesignated as frigates in 1959. The last of the class, Intrepido, was stricken in 1982.
HSwMS Västergötland (Vgd) was the lead ship of the Västergötland-class submarines, named after Västergötland, Sweden. The submarine was launched on 19 July 1986 and entered service with the Swedish Navy on 20 October 1988. Västergötland served with the Swedish Navy until 1997 when the submarine was decommissioned. In 2005 Västergötland and sister boat HSwMS Hälsingland were sold to Singapore, where Västergötland was renamed RSS Swordsman and entered service on 30 April 2013.
HSwMS Najad is the lead ship of her class of submarine for the Swedish Navy, project name A14. She was launched at the Kockums shipyard in Malmö, Sweden, on 13 August 1979, and completed and commissioned into the Swedish Navy on 26 June 1981.
HSwMS Halland (J18) was the lead ship of the Halland-class destroyer. She and HSwMS Småland were the only ones built of their class. Two more ships were ordered but they were never completed.
HMS Östergötland(J20) was the lead ship of the Östergötland-class destroyer.
HSwMS Södermanland(J21) was the second ship of the Östergötland-class destroyer.
Swedish Navy 
