Original armament for the ship consisted of a Mark 13 missile launcher configured to fire RIM-66 Standard and RGM-84 Harpoon missiles, supplemented by an OTO Melara gun and a Vulcan Phalanx point-defence system. For anti-submarine warfare, two Mark 32 torpedo tube sets are fitted; originally firing the Mark 44 torpedo, the "Adelaide"s later carried the Mark 46 torpedoes. Up to six machine guns can be carried for close-in defence, and since 2005, two M2HB .50 calibre machine guns in Mini Typhoon mounts have been installed when needed for Persian Gulf deployments. The sensor suite includes an AN/SPS-49 air search radar, AN/SPS-55 surface search and navigation radar, SPG-60 fire control radar connected to a Mark 92 fire control system, and an AN/SQS-56 hull-mounted sonar. Two helicopters can be embarked: either two S-70B Seahawk or one Seahawk and one AS350B Squirrel.