A bit of text for you, pix later . . .
“When around 1960 the city class destroyers could no longer be classed as such, several – Malmö, Karlskrona and Gävle – were rebuilt as frigates. This meant removing the torpedo equipment to be replaced by two antisubmarine mortars and larger mortar storage facilities on the main deck. Somewhat later, the modified city destroyers were rebuilt, and Visby and Sundsvall were radically altered. All the guns and torpedo equipment were taken on shore. Instead were fitted two new 57 mm automatic cannons, one on the stern and one on the after deck. A new radar fire control system with its antenna in an egg-shaped dome was installed, from Hollandse Signaalapparaten. This was the first to use digital principles. A four-barrel Bofors antisubmarine mortar was put on to the front edge of the rear bridge. At the rear of this bridge a small helicopter platform was installed. New search radar and a new Dutch type hydrophone were fitted. Kalmar and Häslingland received a more limited face-lift. New search radar was installed and the old m/36 40 mm cannons were replaced by remote controlled m/48s. These guns required more deck space, so the torpedo arrangements were changed. The fore triple tube installation was removed and that at the stern extended to 5 tubes.”
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