 Boreas remained on escort duty in the Eastern Atlantic until she arrived in Alexandria , Egypt on 11 November after escorting a convoy around the Cape of Good Hope . She was immediately assigned to escort the ships of Operation <unk> that relieved the Siege of Malta . The ship remained in the Mediterranean until January 1943 before she was briefly assigned to the 13th Destroyer Flotilla at Gibraltar . Boreas returned to Freetown in February and remained there until June when she was transferred to the Mediterranean Fleet in preparation for Operation <unk> . She was converted into an escort destroyer in Liverpool from September 1943 to February 1944 . As part of the conversion , a Type 271 target indication radar was installed above the bridge that replaced her director @-@ control tower and rangefinder and her Type 286 radar was replaced by a Type 290 . 
