 As Victorious had been redeployed to the Indian Ocean in June , the carriers selected for Operation Mascot were the recently commissioned HMS Indefatigable as well as the veterans Formidable and Furious . The carriers were escorted by the battleship HMS Duke of York , four cruisers and twelve destroyers . Admiral Moore commanded the force from Duke of York , and the carrier group was led by Rear Admiral Rhoderick McGrigor on board Indefatigable . 
