 In October she was assigned as part of the escort for Convoy HG 75 , from Gibraltar to Liverpool , because she was scheduled for a refit in the Sheerness Dockyard . It began on 16 November and lasted until 23 January 1942 , after which Duncan rejoined the 13th Destroyer Flotilla at Gibraltar . In late February and March , the ship escorted the carriers Eagle and Argus as they flew off fighters for Malta . The following month , Duncan was transferred to the 22nd Destroyer Flotilla of the Eastern Fleet to support Operation Ironclad , the invasion of Diego Suarez . After four months of operations in the Indian Ocean , the Admiralty decided to convert her to an escort destroyer , and accordingly she returned to the United Kingdom via the Cape of Good Hope as an escort for the battleship Royal Sovereign . The ship arrived in Greenock on 16 November , but did not begin her conversion at Tilbury until 24 November . 
