ADS-B In VS. ADS-B Out
By Mark Wilken
Director of Avionics Sales for Elliott Aviation
Automatic dependent surveillance – broadcast, or ADS-B, is a system put into place by the FAA that promises to make the skies safer for everyone. ADS-B signals use GPS technology, which is far more reliable than radar and will allow air traffic control to reduce separation minimums. As an upcoming mandate, each aircraft will be required to transmit ADS-B to ground stations by January 1st, 2020. While the mandate to aircraft operators only requires ADS-B out, this technology can give you some highly beneficial information by utilizing ADS-B in. I’ll explain the differences below:
When you hear about mandates from the FAA, they are talking about ADS-B out. ADS-B out is a WAAS GPS based signal that broadcasts your aircraft position, vector, altitude and velocity to ADS-B ground stations. This will allow air traffic controllers to more efficiently route traffic to reduce congestion, emission and fuel consumption. To ensure safety, ADS-B needs to broadcast WAAS GPS data from a highly accurate source. Your two options are the dedicated 978 MHz universal access transceiver (UAT), or a 1090 MHz Mode S “extended squitter” transponder with an approved WAAS GPS navigation source. If you already have a WAAS GPS on board, you may just need your transponder updated.
While on the surface, ADS-B may just seem like a mandate, you can take advantage of ADS-B technology by utilizing the highly-beneficial ADS-B in. ADS-B in gives you free datalink traffic and weather that can be show on select displays and mobile devices. With a dual-link receiver, ADS-B in allows you to see all ADS-B equipped aircraft in your vicinity because it receives signals for 978 UAT and 1090 MHz ES transponders. In addition, when you are in range of ground stations, you see a traffic picture similar to what the air traffic controllers are seeing.
ADS-B will give pilots and passengers many long-term benefits, however, ADS-B in gives you a more immediate return on your investment. If you have any further questions on if your aircraft will comply or how you can take advantage of ADS-B in, contact your certified avionics installer.
Mark Wilken is the Director of Avionics Sales for Elliott Aviation, which employs over 40 avionics technicians at their headquarters in Moline, IL. Mark began his career at Elliott Aviation in 1989 as a bench technician repairing radios and quickly became the manager of the department. Mark helped launch Elliott Aviation’s Garmin G1000 retrofit program in which the company has installed more King Air G1000’s than all other dealers in the world combined. Recently, he has headed STC programs for the newly launched Aircell ATG 2000 system for Hawker 800/850/900, Phenom 300 and King Air 350/B200/B200GT. Mark is a licensed pilot and holds an associate’s degree in avionics and a bachelor’s degree in aviation management from Southern Illinois University.
Elliott Aviation is a second-generation, family-owned business aviation company offering a complete menu of high quality products and services including aircraft sales, avionics service & installations, aircraft maintenance, accessory repair & overhaul, paint and interior, charter and aircraft management. Serving the business aviation industry nationally and internationally, they have facilities in Moline, IL, Des Moines, IA, and Minneapolis, MN. The company is a member of the Pinnacle Air Network, National Business Aviation Association (NBAA), National Air Transportation Association (NATA), and National Aircraft Resale Association (NARA).