Direct User Access Terminal Service (DUATS) was a weather information and flight plan processing service contracted by the Federal Aviation Administration (FAA) for use by United States civil pilots and other authorized users. The DUAT Service was a telephone- and Internet-based system which allowed the pilot to use a personal computer for access to a Federal Aviation Administration (FAA) database to obtain weather and aeronautical information and to file, amend, and cancel domestic IFR and VFR flight plans. DUATS provided direct access to weather information via a National Airspace System (NAS) Data Interchange Network II (NADIN-II) interface to the Weather Message Switching Center Replacement (WMSCR) System and the Air traffic control (ATC) Facilities for filing flight plans. The pilot users could interface DUAT Services via the FTS-2001 toll free telephone numbers or via an Internet Interface into the Contractor's Facility. The service could be accessed by direct dial (using a terminal emulator like HyperTerminal), and the Internet via Telnet or HTTP.