In 1971 she carried the Governor-General of Canada, Roland Michener to Europe, hosting the heads of state of Belgium and Netherlands. In June of that year, the ship took part in the first-ever refueling of a hydrofoil at sea, replenishing . As part of Canada's contribution to the UN peacekeeping force in Cyprus, "Preserver" supported Canadian troops through 1974–75. The ship served Canada's fleet in domestic and international exercises in the 1980s and 1990s. In December 1992, she took part in Operation Deliverance, the ill-fated Canadian Forces operation that turned into the Somalia Affair. In 1994, "Preserver" was part of the multinational force enforcing sanctions on the former Yugoslavia. The vessel returned to that force in May–June 1995. In September 1998, she was part of the Canadian naval response to the crash of Swissair Flight 111 off the coast of Nova Scotia. The ship sailed for Afghanistan in October 2001, as part of Operation Apollo, Canada's initial response to the Global War on Terrorism. She returned from that duty in April 2002.