EC systems are designed for aircraft to aircraft visibility. An EC device will not meet standards to allow you to enter controlled airspace of a class in which a transponder is mandatory or a Transponder Mandatory zone (TMZ). In addition, EC device transmission must be deactivated when used in an aircraft with an Extended Squitter (ES) ADS-B Out Enabled Transponder in use. The SkyEcho web based configuration page ( allows you to turn off the transmit function while still being able to receive traffic for display on the compatible app.

Note: a Mode S transponder is ADS-B enabled only when it is connected to a compatible GNSS source, which can be either internal or external to the transponder.