HSwMS Tre Kronor was a cruiser built for the Royal Swedish Navy during the Second World War.
The Halland-class destroyers were two ships built for the Swedish Navy in the 1950s. Four ships were planned, but the second pair were canceled. Two modified ships were exported to the Colombian Navy. These vessels were general purpose surface combatants.
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 Neptun-class submarine was a Swedish submarine class built by Kockums. The first submarine was launched in 1942 and a total of three submarines were built: HSwMS Neptun, HSwMS Najad and HSwMS Nacken. The class was decommissioned in 1966.
Sweden played a role of major importance during the Cold War, despite not officially participating. Sweden's location made it an ideal base of operations for both the Soviet Union and the United States. Sweden was never invaded throughout the war, mainly due to their strong defensive power - ranked among the top five in the world at this time.
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 Hajen (Hj), was the lead boat of the Hajen-class submarine of the Swedish Navy.
HSwMS Sälen (Sä), was the second Hajen-class submarine of the Swedish Navy.
HSwMS Valen (Va), was the third Hajen-class submarine of the Swedish Navy.
HSwMS Illern (In), was the fourth Hajen-class submarine of the Swedish Navy.
HSwMS Bävern (Bä), was the fifth Hajen-class submarine of the Swedish Navy.
HSwMS Uttern (Ut) was the sixth Hajen-class submarine of the Swedish Navy.
Two warships of Sweden have been named Sälen, after Sälen in the Dalarna of Svealand:
Three warships of Sweden have been named Hajen, after Hajen:
Two warships of Sweden have been named Valen, after Valen:
Two warships of Sweden have been named Illern, after Illern:
Two warships of Sweden have been named Bävern, after Bävern:
Three warships of Sweden have been named Uttern, after Uttern:
Swedish Navy 
