 On 1 May 1958, "Tills"' home port was moved to Boston, Massachusetts, shifting the locus of her operations northward to the northeastern coast of the United States and to the Canadian provinces of Nova Scotia and Newfoundland.On 1 September 1959, after the ship had conducted reserve training and refresher training cruises for over a year, her home port was moved still farther north to Portland, Maine.On 18 October 1959, "Tills" was decommissioned and placed in service as a unit of the Selected Reserve Training Program.