Sjöormen-class submarine

The Sjöormen-class submarine is a class of submarines that were operated by the Swedish Navy. These submarines were designed and built in the late 1950s and early 1960s and were in service from the mid-1960s until the early 2000s. The Sjöormen-class submarines were known for their distinctive design, which allowed them to operate effectively in the shallow waters of the Baltic Sea, an operational requirement for the Swedish Navy.