sentences:  The destroyer escort was selected for the IRE program and underwent the modernization beginning in 1970 at Halifax Shipyards.She returned to active duty on 12 May 1972 and was transferred to the west coast, arriving at CFB Esquimalt on 2 August 1973.In August 1984, "Restigouche" was sent to track the Soviet spy ship "Semen Chelyushkin" of Cape Flattery.