 This involved the replacement of ' A ' gun by a Hedgehog anti @-@ submarine spigot mortar , the removal of her director @-@ control tower and rangefinder above the bridge in exchange for a Type 271 target indication radar , exchanging her two 2 @-@ pounder AA guns mounted between her funnels for two Oerlikon 20 mm AA guns , the addition of two Oerlikon guns to her searchlight platform , and the removal of her 12 @-@ pounder AA gun . ' Y ' gun was also removed to allow her depth charge stowage to be increased to 98 depth charges . 
