Warning system
Reclassified DER-390 on 28 October 1954, "Calcaterra" was converted to a radar picket ship at Norfolk, Virginia, and recommissioned on 12 September 1955. Based on Newport, Rhode Island, the radar picket ship almost continuously served in the violent weather of the North Atlantic once lost all life lines and ready service box's, 5" gun mount was lifted of her gimbals that a crane had to be used to remount it, to maintain her link in the extension of the Distant Early Warning system. Except for exercises with the fleet in the Atlantic and Caribbean, and a cruise to Europe Ship would go out on picket 30 days than 2 weeks in the states (For the married men,) out for 30 days picket than 2 weeks in Europe ended up once in Antwerp Belgium(August–October 1958), "Calcaterra" continued this duty through 1960.