in Sydney for the rest of the year. During the night of 24–25 December 1974, Cyclone Tracy destroyed the city of Darwin; the destroyer's personnel were recalled from leave, and she left early on 26 December in the company of , which was loaded with relief supplies. Brisbane sped ahead and arrived on 31 December, setting up communications between the relief force and Canberra. The destroyer's participation on Operation Navy Help Darwin, the RAN's largest disaster-relief operation, was the longest of any RAN vessel; the first to arrive, and the last to depart on 31 January 1975. In addition to facilitating communications, Brisbanes personnel were responsible for clearing sites for helicopters and headquarters, salvaging boats and equipment, repairs of infrastructure, and installation of power generators: on average, 160 of the ship's company went ashore each day. On 16 July 1975, Brisbane sailed for a deployment to the Far East Strategic Reserve. This concluded on 5 November, with the destroyer returning to Sydney and docking for maintenance. In early 1977, Brisbane participated in the RIMPAC multinational exercise. In April 1977, Brisbane and were assigned to escort Melbourne during a five-month return trip to the United Kingdom for the Silver Jubilee Naval Review. On 9 May, one of the carrier's Sea King helicopters was forced to ditch in the Indian Ocean: Brisbane successfully recovered the aircrew. The ships participated in the naval review at Spithead on 28 June, and Brisbane returned to Sydney on 4 October, entering dock for refit eight days later. This maintenance period lasted until May 1979, and saw the ship's propulsion system converted from fuel oil to diesel, updates to the combat system, and installation of an AN/SPS-40C radar. Apart from a visit to New Zealand, Brisbane spent the rest of 1979 in Australian waters. During the early 1980s, the destroyer participated in RIMPAC exercises, and made patrols of the Indian Ocean. From 16 August 1982 to 5 August 1983, Brisbane underwent refit, after which, the destroyer remained docked alongside at Garden Island until March 1984. Another refit period occurred between September 1985 to October 1987. In early 1988, Brisbane visited Melbourne for the Moomba festal, then sailed to her namesake city in August to participate in a 'Shopwindow' exercise with ships of the Royal New Zealand Navy. In October, the destroyer was deployed to South-east Asia for three months, returning to Darwin on 8 January 1989. During