Garmin AERA 660 Pilot's Manual page 118

Hazard Avoidance
GPS
18,000 FT
10,000 FT
Mode A/C
RADAR
For the purpose of distinguishing between levels of ADS-B service, there are three
classifications of aircraft or system capability; ADS-B In, ADS-B Out, and ADS-B
participating. ADS-B In refers to the capability to receive ADS-B information. ADS-B
Out refers to the capability to transmit ADS-B information. ADS-B participating refers
to the capability to both send and receive ADS-B information. Aircraft lacking either
ADS-In, ADS-B Out, or both ADS-B capabilities may also be referred to as ADS-B non-
participating aircraft.
Currently, rule-compliant ADS-B Out capability in the United States requires a
TSO'ed SBAS-enabled GPS, such as a Garmin GPS 400W or similar, and one of two
possible data links: 1090 ES transponder or a 978 MHz UAT. Either data link system
is capable of transmitting the aircraft's position, velocity, identification, and other
information every second to compatible aircraft and ground stations called Ground
Based Transceivers (GBTs).
102
UAT
ATC
ADS-B System
Garmin aera 660 Pilot's Guide
Composite
1090 ES
UAT
1090 ES
ADS-B
Ground
Station
1090 ES
UAT
RADAR
UAT
190-02017-20 Rev. A