The main superstructure was just about the midships and housed, among other things, crew kitchens, wheelhouse and maneuvering cabin as well as command bridge.

[4] Kalmar was built at Eriksbergs Mekaniska Verkstad in Gothenburg and was launched on 20 July 1943 and commissioned on 3 February 1944.

Helicopter platform was built and new fire line was installed with a new radar antenna in a radome on the bridge deck.

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