RFT 114: ADS-B
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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