 They returned home on 14 June and the <unk> began preliminary planning to replace the lost carriers with hybrid carriers converted from battleships . The sisters were selected for conversion and detached from the division on 14 July in preparation . They remained on " standby alert " until the actual <unk> began . <unk> was converted at <unk> Naval Arsenal from 23 February to 5 September 1943 and <unk> at <unk> Naval Arsenal from 2 May to 30 November . 
