National Airspace System (NAS)

The DoD National Airspace System NAS is comprised of three systems the Digital Airport Surveillance Radar DASR, the DoD Advanced Automation System DAAS, also known as the Standard Terminal Automation Replacement System STARS within the Federal Aviation Administration FAA, and the Voice Communication Switching System VCSS. The DoD NAS program is modernizing the DoD radar approach control facilities in parallel with the FAA. The DoD NAS program provides systems and facilities compatibleinteroperable with the FAA modernization, prevents DoD flight delays and cancellations, continues DoDs access into Special Use Airspace, provides transparent services to military and civil aircraft, replaces aging DoD Air Traffic Control ATC systems, and increases flight safety. NAS is a Non-Developmental Item NDI acquisition. DoD will upgrade voice, data, and sensor systems as well as facility configurations and operations concepts to provide continued quantity and quality of ATC services to the aviation community. To supplement the DAAS, the DoD procured the Airfield Automation System AFAS to integrate weather, airport environmental data, and airfield equipment status at air traffic control positions. DoD military ATC and fightingflying readiness will be maintained.