Communications, Navigation & Surveillance (CNS)

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  • ADS-B

    Automatic Dependent Surveillance -
    Broadcast (ADS-B)

    Automatic Dependent Surveillance (ADS-B) is widely recognized as a cornerstone technology for monitoring aircraft in the skies and on the ground in the continuing transformation to a Next Generation (“NextGen”) aviation system.

  • Mode S

    Mode S Transponders

    Mode S Elementary Surveillance (ELS) and Mode S Enhanced Surveillance (EHS) transponders provide additional flight parameters to air traffic control thus improving the quality, detection, identification and altitude reporting of aircraft within the airspace.

  • Cockpit Voice Recorders (CVRs)/Flight Data Recorders (FDRs)

    Cockpit Voice Recorders (CVRs)/Flight Data
    Recorders (FDRs)

    A Cockpit Voice Recorder (CVR) records radio transmissions and sounds in the aircraft’s cockpit, such as the pilot’s voices and engine noises while a Flight Data Recorder (FDR) records aircraft parameters such as altitude, airspeed and heading.

  • Traffic Alert and Collision Avoidance System (TCAS)

    Traffic Alert and Collision Avoidance System (TCAS)

    Traffic Alert and Collision Avoidance System (TCAS) is an airborne system that operates independently from the ground-based Air Traffic Control (ATC) system. TCAS was designed to increase cockpit awareness of proximate aircraft and to serve as a “last line of defense” for the prevention of mid-air collisions.

  • Reduced Vertical Separation Minima (RVSM)

    Reduced Vertical Separation Minima (RVSM)

    View news and references for domestic and international Reduced Vertical Separation Minima (RVSM) airspace.

  • Performance-Based Navigation (PBN)

    Performance-Based Navigation (PBN)

    Information related to the use of Area Navigation (RNAV) Standard Instrument Departures (SIDs), RNAV Standard Terminal Arrivals (STARs), and Required Navigation Performance Authorization Required (RNP AR) Approaches.

  • Electronic Flight Bags (EFBs)

    Electronic Flight Bags (EFBs)

    An Electronic Flight Bag (EFB) is an electronic device that allows flight crews to perform a variety of functions that were traditionally accomplished by using paper references.

  • Emergency Locator Transmitters (ELTs)

    Emergency Locator Transmitters (ELTs)

    Emergency Locator Transmitters (ELTs) are emergency beacons carried aboard aircraft to notify search-and-rescue personnel when an aircraft is down. There are several types of ELTS, and most U.S. civil aircraft are required to carry one.

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