RFT 114: ADS-B

August 26, 2017


ADS-B enables increased capacity and efficiency by supporting:

  • Better ATC traffic flow management
  • Merging and spacing
  • Self-separation or station keeping
  • Enhanced visual approaches;
  • Closely spaced parallel approaches;
  • Reduced spacing on final approach;
  • Reduced aircraft separations;
  • Enhanced operations in high altitude airspace for the incremental evolution of the “free flight” concept;
  • Surface operations in lower visibility conditions;
  • Near visual meteorological conditions (VMC) capacities throughout the airspace in most weather conditions;
  • Improved air traffic control services in non-radar airspace;
  • Trajectory-based operations providing a gently ascending and descending gradient with no step-downs or holding patterns needed. This will produce optimal trajectories with each aircraft becoming one node within a system wide information management network connecting all equipped parties in the air and on the ground. With all parties equipped with NextGen equipage, benefits will include reduced gate-to-gate travel times, increased runway utilization capacity, and increased efficiency with carbon conservation.
  • Use of ADS-B and CDTI may allow decreased approach spacing at certain airports to improve capacity during reduced-visibility operations when visual approach operations would normally be terminated (e.g., ceilings less than MVA +500).
  • ADS-B In Requirements
  • ADS-B Out will be required in the following airspace:
    • Class A, B, and C airspace
    • Class E airspace areas at or above 10,000 ft MSL over the 48 states and DC, excluding airspace at and below 2,500 ft AGL
    • Airspace within 30 nautical miles (nm) at certain busy airports from the surface up to 10,000 feet MSL; airports listed in appendix D to part 91.
    • Above the ceiling and within the lateral boundaries of a Class B or Class C airspace area up to 10,000 feet MSL
    • Class E airspace over the Gulf of Mexico at and above 3,000 feet MSL within 12 nm of the coastline of the United States

 

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