Aeronautical Information Manual
AIM 4-5-10
Automatic Dependent Surveillance-Rebroadcast (ADS-R)
Introduction. ADS-R is a datalink translation function of the ADS-B ground system required to accommodate the two separate operating frequencies (978 MHz and 1090 ES). The ADS-B system receives the ADS-B messages transmitted on one frequency and ADS-R translates and reformats the information for rebroadcast and use on the other frequency. This allows ADS-B In equipped aircraft to see nearby ADS-B Out traffic regardless of the operating link of the other aircraft. Aircraft operating on the same ADS-B frequency exchange information directly and do not require the ADS-R translation function. (See FIG 4-5-7 and FIG 4-5-8 .)
Reports of ADS-R Malfunctions. Users of ADS–R can provide valuable assistance in the correction of malfunctions by reporting instances of undesirable system performance. Since ADS–R performance is monitored by maintenance personnel rather than ATC, report malfunctions to the nearest Flight Service Station (FSS) facility by radio or telephone, or by sending an email to the ADS-B help desk at adsb@faa.gov . Reports should include:
Condition observed;
Date and time of observation;
Altitude and location of observation;
Type and call sign of the aircraft and;
Type and software version of avionics system.
Previous | Top | Next AIM |
ATPUBS |
FAA |
Send your comments regarding this website.
Chapter 4. Air Traffic Control AIM
AIM by Chapter Number Chapter 0. General Information Chapter 1. Air Navigation Chapter 2. Aeronautical Lighting and Other Airport Visual Aids Chapter 3. Airspace Chapter 4. Air Traffic Control Chapter 5. Air Traffic Procedures Chapter 6. Emergency Procedures Chapter 7. Safety of Flight Chapter 8. Medical Facts for Pilots Chapter 9. Aeronautical Charts and Related Publications Chapter 10. Helicopter Operations Chapter 11. Unmanned Aircraft Systems (UAS) Appendix 1 Appendix 2 Appendix 3 Appendix 4 Appendix 5
ATPUBS
AIM by Topic
General Information Explanation of Changes
Air Navigation Navigation Aids
Performance-Based Navigation (PBN) and Area Navigation (RNAV)
Aeronautical Lighting and Other Airport Visual Aids Airport Lighting Aids
Air Navigation and Obstruction Lighting
Airport Marking Aids and Signs
Airspace General
Controlled Airspace
Class G Airspace
Special Use Airspace
Other Airspace Areas
Air Traffic Control Services Available to Pilots
Radio Communications Phraseology and Techniques
Airport Operations
ATC Clearances and Aircraft Separation
Surveillance Systems
Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR
Operational Policy/Procedures for the Gulf of America 50 NM Lateral Separation Initiative
Air Traffic Procedures Preflight
Departure Procedures
En Route Procedures
Arrival Procedures
Pilot/Controller Roles and Responsibilities
National Security and Interception Procedures
Emergency Procedures General
Emergency Services Available to Pilots
Distress and Urgency Procedures
Two‐way Radio Communications Failure
Aircraft Rescue and Fire Fighting Communications
Safety of Flight Meteorology
Barometric Altimeter Errors and Setting Procedures
Cold Temperature Barometric Altimeter Errors, Setting Procedures and Cold Temperature Airports (CTA)
Wake Turbulence
Bird Hazards and Flight Over National Refuges, Parks, and Forests
Potential Flight Hazards
Safety, Accident, and Hazard Reports
Medical Facts for Pilots Fitness for Flight
Aeronautical Charts and Related Publications Types of Charts Available
Helicopter Operations Helicopter IFR Operations
Special Operations
Unmanned Aircraft Systems (UAS) General
Small Unmanned Aircraft System (sUAS)
Large UAS (MGOW 55 Pounds or More)
Airspace Access for UAS
UAS Pilot Testing, Certification and Responsibilities
Advanced Air Mobility
UAS Operations on Airports
Other Information and Best Practices
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Air Traffic Control
Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR
Chapter 4. Air Traffic Control
Section 6. Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR
Retrieved from ecfr.gov on July 20, 2026.