After typhoon Haiyan devastated Tacloban and areas around it, a lot of UAV's have been utilized to do damage assessments. And some pilots complained that they saw UAV's flying in the area during the relief operations.
As a POC, we have fitted an ADS-B receiver on the DJI M100. The ADS-B messages are passed from our own custom on-board computer and onboard application via Transparent Data communication to the mobile device.
The said on-board computer also computes trajectories of the aircraft around it and can make the DJI M100 (and can support APM) descend or increase altitude to avoid incoming aircraft. Our goal is to have improve situational awareness for pilots (and autopilots) of remotely piloted vehicles.
The ADS-B feature was part of our entry "Project Kwago", to the recently concluded Drones for Good in Dubai (2016). Project Kwago made it to the semi-finals.