[3]: 62 In the spring and summer of 1947, three Air Defense Command Aircraft Control and Warning (AC&W) plans went unfunded.
The Radar Fence was rejected by ADC since "no provision was made in it for the Alaska to Greenland net with flanks guarded by aircraft and radar picket ships [required] for 3 to 6 hours of warning time" (the Alaska to Greenland net was eventually built as the Distant Early Warning Line).
[citation needed] On 13 February 1950, HQ USAF had "advanced the completion date from July 1, 1951, to December 31, 1950, for the most essential radar stations.
[7] By 10 November a separate Air Defense Command headquarters was approved,[7]: 140 the Federal Civil Defense Administration was created in December 1950,[4]: 59 and command centers communicated radar track information to the national ADC center that had moved from Mitchell Field to Ent Air Force Base on 8 January 1951.
MCCs continued at several sites where DCs were planned but never built for sectors at Albuquerque, Fort Knox, Kansas City, Miami, Raleigh, San Antonio, Shreveport, and St Louis.
with newer radars developed for the Permanent System): Montauk L-10/LP-45/P-45, Fort Custis L-15/LP-56, Palermo L-13/LP-54/P-54, Sault Sainte Marie L-17/LP-20, and Highlands L-12/LP-9/P-9.
The SAGE centers were subsequently replaced with the full operational capability of 7 Joint Surveillance System centers on 23 December 1980,[14] and remaining radar stations of the permanent network include the former 1951 P-37, P-38, and RP-39 which became FAA Ground Equipment Facility radar stations of the Joint Surveillance System.