From April to June 1955, the ship underwent repairs at the Philadelphia Naval Shipyard and then proceeded to Newport, Rhode Island, for underway training. On 20 September, she got underway for Operation Sunec, which took her to Thule, Greenland, and ports in Labrador and Newfoundland. After returning in December, "Ashland" entered an upkeep period lasting through February 1956. She then received further repairs at Baltimore. In April, the ship took part in amphibious exercises at Vieques Island, Puerto Rico. Following this evolution, she made a reserve training cruise to Bermuda. In July, the vessel embarked Army personnel and equipment at NS Argentia, Newfoundland, and sailed on 19 July as part of the DEW line resupply mission. This operation lasted through 8 October.