As with Pilot Aware and Flarm, SkyEcho is predominately a collision avoidance system between aircraft in the air. CAA refer to these devices as conspicuity aids and are currently offering a 50% rebate when purchased. Each operator enters their aircrafts stall speed, and ident hex number. Below that GPS derived stall speed ADSB out ceases and the aircraft will not be seen.
Owners of aircraft should not play with them in their car with ADSB out enabled as they will be 'seen' as an aircraft 'flying' along the motorway when driving faster then the stall speed of their aircraft.
I did not know that, unlike the US, ATC or radar services in the UK currently do not have ADSB receivers that could receive and ident an ADSB out equipped aircraft. Without a mode C transponder in my aircraft I was hoping ADSB out would allow me to be identified and transit controlled airspace ...but that is not the case.