The third weapon system was the Australian Ikara anti-submarine weapon; a rocket-powered aircraft capable of carrying a Mk.44 homing torpedo or nuclear depth bomb out to 10 miles from the ship.
The original design called for a long range 3-D air search radar to be fitted, the joint Anglo-Dutch Type 988 "Broomstick", and early drawings and artist's impression show a large dome on the bridge to carry this set.