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. As part of the mid-2000s FFG Upgrade Project, an eight-cell Mark 41 Vertical Launch System was fitted, with a payload of RIM-162 Evolved Sea Sparrow missiles. For anti-submarine warfare, two Mark 32 torpedo tube sets were fitted; originally firing the Mark 44 torpedo, the "Adelaide"s later carried the Mark 46, then the MU90 Impact following the FFG Upgrade. Up to six machine guns could be carried for close-in defence, and since 2005, two M2HB .50 calibre machine guns in Mini Typhoon mounts were installed when needed for Persian Gulf deployments. The sensor suite included 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 could be embarked: either two S-70B Seahawk or one Seahawk and one AS350B Squirrel.