Originally Posted by
Dick Smith
KR what's the difference between the red and the green in the lower pic?
Huge. If self separation using radio in IMC is so good why do we need ATC?
Red is radar coverage, green is other surveillance coverage. The yellow pins in the previous image show radar and ADS-B outlets.
I'd take it as a guide only because there are plenty of places subject to anomalous propagation that have variable radar coverage. A bit like the coverage maps the mobile companies publish really.
Self separation around a common point (as in one you're all flying to) like an aerodrome is easy.