[1] In 1957 the Fort Meade station was designated an Army Air-Defense Command Post (AADCP) for the Washington-Baltimore Defense Area.
[3] Designated W-13DC, the site had an AN/FPS-67 search radar and later a solid-state Hughes AN/TSQ-51 Air Defense Command and Coordination System.
On October 1, 1961, W-13DC was integrated[clarification needed] with the Aerospace Defense Command network as replacement site RP-54 operated by the USAF's 770th Airborne Control and Warning Squadron that transferred from former site P-54 at Palermo Air Force Station, New Jersey.
[5][verification needed] In addition to an annex at the former Manassas Air Force Station,[6] the Fort Meade radar station had unmanned AN/FPS-14 Gap Filler annexes at Hermanville, Maryland (RP-54A/Z-227A, 38°13′40″N 076°24′33″W / 38.22778°N 76.40917°W / 38.22778; -76.40917 (RP-54A)) and Hanover, Pennsylvania (RP-54B/Z-227B, 39°51′28″N 076°56′52″W / 39.85778°N 76.94778°W / 39.85778; -76.94778 (RP-54B)).
[citation needed] The Washington AADCPs at Suitland & Ft Meade were deactivated on September 1, 1974; and USAF air defense operations at Ft Meade ended October 1, 1979 (a plan to use the site in the 1983 Joint Surveillance System was not implemented).