The Swiss Army just announced the procurement of Lockheed Martin’s Indago 3 reconnaissance drones. These vehicles carry a miniaturized FLARM as part of their sense-and-avoid suite. Nearby manned traffic will be displayed to the drone operator so conflicts can be easily avoided. Likewise, the drones will be visible to manned traffic as well.
This is another strong argument for technical diversity in electronic conspicuity: No single technology is capable of covering all the use cases. The integration of a FLARM system is simple and inexpensive. There is no need for an expensive and unreliable infrastructure for rebroadcasting signals – it just works.