This report reflects the results of an effort at the National Aviation Facilities Experimental Center (NAFEC) to test and evaluate the interface between the intermittent positive control (IPC) system and the enroute air traffic controller. In testing this interface, the IPC algorithm was resident in the Digital Simulation Facility, which simulated the operation of a Discrete Addresss Beacon System (DABS). The test series was operationally oriented and did not consider such factors as program size, loading factors, or processing time. The results of the tests reveal that the IPC controller alerts, consistency of commands, readability of displayed information, and method of displaying information to the controllers were acceptable. The issuance of negative commands to aircraft presents a problem to the controllers, in that negative phraseology is not utilized in the air traffic control system. The alerting methods of IPC and conflict alert are similar, but because of the critical timing of the IPC alert, it was felt that a distinctly different alert for IPC should be utilized.

  • Corporate Authors:

    National Aviation Facilities Experimental Center

    Federal Aviation Administration
    Atlantic City, NJ  United States  08405
  • Authors:
    • Goodwin, J W
  • Publication Date: 1977-10

Media Info

  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00169182
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-RD-77-125 Intrm Rpt., FAA-NA-77-12
  • Files: NTIS, TRIS, USDOT
  • Created Date: Jan 30 1978 12:00AM