Within a few years of the Type 41's introduction in the late 1950s they were regarded as obsolete for their intended function as anti-aircraft convoy escorts. This was emphasized when the planned replacement of the 4.5" guns with 3"/70 AA guns was abandoned (in January 1955) due to cost and the view that AA guns were obsolete against jets and missiles. The addition of power-ramming for the twin 4.5" guns, intended to boost the rate of fire from 14rpm to 24rpm, failed. Replacement of the unreliable STAAG 40mm gun mount by Seacat surface-to-air missiles was cancelled on economic grounds, and the guns eventually replaced by a single, manually operated Bofors gun. Replacement of the experimental version of the fast rotating 992 target indicators with the slower standard 993 was also abandoned. Only a short range 262 radar MRS1 provided secondary AA fire control for the main armament.