En anglais
Extrait
First, ADS-B reveals that the old strategy of See and Avoid is simply not sufficient to avoid collisions.
Yes, the probability of a collision is small, but that event does happen. Has done so at our Aero Country airport roughly once every ten years.
Second, even if you live in a location where ADS-B Out is not mandated, it is a smart idea to install it. If you don’t have ADS-B In, that’s needed, too. And, the sooner you do, the better the chance that you will not become a contributing data entry of mid-air collision reports.