Stockholm class corvette is a corvette class in the Swedish Navy. Built in Karlskrona 1984–1985, it is armed with eight RBS15 anti-ship missiles, torpedoes, one 57mm cannon and several machine guns. In 1999/2000 the two units in the class were upgraded in the Karlskrona shipyard Kockums. The upgrade included new engines, sensors, stealth technology, and navigation systems, the goal being to bring the technology up to the same level as the Visby class.