The decision was to use the Ytattack-81 project and modify it for ASW operations, as designing a completely new ship is a time-consuming and costly task. It was given a towed array sonar, ASW torpedoes and the ELMA anti-submarine mortar system. HSwMS Stockholm was launched on 22 August 1984 closely followed by HSwMS Malmö on 23 March 1985, both ships entered service on 1 May 1986.
The decision involved using the Ytattack-81 project and modifying it for ASW operations, as constructing a new ship is time-consuming and costly. It was equipped with a towed array sonar, ASW torpedoes, and the ELMA anti-submarine mortar system. HSwMS Stockholm was launched on 22 August 1984, followed by HSwMS Malmö on 23 March 1985; both ships entered service on 1 May 1986.