Power: Steaming through the Heads into Sydney Harbor early this year are (at left) a British cruiser and the aircraft-carries HMs Indomitable and Illustrious. Indomitable has since been engaged before the Sakishima Group (east of Formosa) and with the Illustrious, Indefatigable and Victorious attacked the Ryukyus in connection with the Okinawa invasion. All four carriers-British largest and most powerful-are at the moment operating in the Pacific. May 04, 1945.