Definition
A former U.S. Department of Defense agency responsible for planning, engineering, and managing military communications systems used by all branches of the armed forces. It coordinated the long-haul communications networks that connected military commands, including links used for air traffic and airspace coordination between civil and military authorities. The agency was renamed the Defense Information Systems Agency (DISA) in 1991, but the acronym DCA still appears in older FAA publications and historical references.
Plain English
DCA was the military office that ran the Department of Defense's communications networks. It is the older name for what is now called DISA.
Context Anchor
Seen in FAA acronym and abbreviation lists when a document is identifying government or defense-related organizations.
Why Pilots Care
Pilots will rarely interact with DCA directly, but the acronym shows up in FAA documents covering civil-military coordination and historical airspace agreements. Recognizing it prevents confusion when reading older source material.
Intuition Check
Do not assume DCA always means the Washington, D.C. airport. In this FAA acronym context, it means Defense Communications Agency.
Example Sentence 1
The older interagency agreement referenced the Defense Communications Agency (DCA) as the office responsible for managing military long-haul communications.
Example Sentence 2
Military operations sometimes reference communications networks once managed by the DCA.