company is 184, including 15 officers, but excluding the flight crew for the embarked helicopters. 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 Adelaides 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. Canberra was laid down as the first ship of the Perry class's Flight II design by Todd Pacific Shipyards at Seattle, Washington on 1 March 1978, and launched on 1 December 1978. Canberra was commissioned into the RAN on 21 March 1981. The ship received the United States Navy hull number FFG-18 during construction. Armament Canberras main weapon was the Mark 13 missile launcher located on the foredeck: this is used to fire both Harpoon and SM-2MR Standard missiles. A Mark 75 OTO Melara gun is located on top of the superstructure, in front of the exhaust funnel. A triple-barrelled Mark 32 torpedo tube set is fitted to each side of the superstructure. For close defence, a Mark 16 Mod 2 Phalanx CIWS sits at the aft end of the superstructure, above the frigate's two helicopter hangars. The hangars housed two S-70B Seahawk helicopters. Operational history After commissioning, Canberra and Adelaide remained in the United States to work up; during this time both ships were attached to the United States Navy's Destroyer Squadron 9. Canberra was assigned as escort to the Royal Yacht Britannia during Queen Elizabeth II's visit to Australia during April and May 1988, as part of the Australian Bicentennary celebrations. On 16 May 1990, Canberra was one of six Australian warships, and one of 64 naval vessels from 21 nations present at the Royal Fleet Review marking the 55th anniversary of the Royal Malaysian Navy. Canberra was deployed to the Red Sea from