Finnish minelayer Keihässalmi

Keihässalmi was a minelayer of the Finnish Navy. She was commissioned in 1957 and remained in service until 1994, after which she was turned into a museum ship in Turku. The vessel was named after the strait of Keihässalmi, which is located in Sipoo. Keihässalmi was the first Finnish minelayer to be constructed after World War II.

Keihässalmi was designed according to lessons learned from the Ruotsinsalmi class minelayers, but with increased size and tonnage. It was stronger, more seaworthy and faster than its predecessor. The construction took place from 1956 to 1957 at the Valmet Oy shipyard in Helsinki. The sinking of the minelayer Riilahti in 1943 had left a big gap in Finnish mine warfare capabilities, and a new vessel was needed. It would last until the mid-1950s before this was addressed, due to the harsh after-war conditions and war-payments which included many ships to be constructed at Finnish shipyards.