ADS-B TRAFFIC
ADS-B data is broadcast on either the 978 MHz or 1090 MHz frequency (1090 MHz is required
internationally and above FL180). Sentry, Sentry Mini, and Sentry Plus are dual-band receivers
capable of detecting traffic on both ADS-B frequencies.
Aircraft do not need to be ADS-B Out equipped for Sentry to receive traffic. However, if your
aircraft is not ADS-B Out equipped, ForeFlight may show significant relative altitude
discrepancies. See ADS-B Ownship for additional information. Additionally, if your aircraft is
not ADS-B Out equipped, ForeFlight may not display traffic detected from surveillance radar.
See Traffic Information Service Broadcast (TIS-B) for additional information.
Sentry receivers are able to receive ADS-B traffic without requiring additional equipment. All
traffic detected by Sentry is displayed in ForeFlight when the Traffic map layer is selected.
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