As UAV operations move toward BVLOS, industrial inspection, flight testing and future UTM or U-Space environments, unmanned aircraft need more than endurance, payload capacity and autonomy. They need to understand what is happening around them — and, where appropriate, make themselves visible to other airspace users.
This is where cooperative surveillance becomes essential. Technologies such as ADS-B, FLARM and UAT allow aircraft and airspace systems to exchange traffic, position and identification data. For UAV manufacturers and integrators, the challenge is not simply to add a transceiver to an aircraft. It is to select the right surveillance capability for the mission, the airspace and the platform.
The Aerobits TR-3 Series was developed for this requirement. It provides a compact, low-power transceiver platform for unmanned aviation, available in three variants: TR-3A with ADS-B and GNSS, TR-3F with ADS-B, FLARM and GNSS, and TR-3U with ADS-B, UAT and GNSS.
Situational awareness is a core part of aviation safety. Crewed aircraft rely on pilots, avionics, air traffic services and surveillance systems to maintain awareness of surrounding traffic. UAVs operate differently.
In BVLOS missions, the pilot is not visually observing the aircraft. The UAV may be connected to an autopilot, ground control station, command-and-control link, UTM service or Detect and Avoid logic. In this environment, traffic data becomes a key input for safer decision-making.
Cooperative surveillance allows a UAV to receive data from other equipped aircraft, transmit its own position where permitted, and provide traffic information to onboard or ground-based systems. It does not replace every form of sensing or risk mitigation, but it creates an important layer of airspace awareness.
For professional UAV platforms, this matters in infrastructure inspection, energy network monitoring, mapping, public safety, logistics, flight testing and R&D. As missions become more complex, drones need to operate less like isolated platforms and more like integrated airspace participants.
ADS-B, FLARM and UAT are often grouped together, but they serve different operational needs.
The key point is simple: UAV surveillance is not one-size-fits-all. The right solution depends on the aircraft, mission profile, surrounding airspace, regulatory context and integration requirements.
Traditional aviation hardware is not always suitable for UAV platforms. Small and medium unmanned aircraft often have strict limits on space, weight and power. A surveillance device must therefore be compact, lightweight, efficient and easy to integrate.
For UAV manufacturers and system integrators, integration effort is just as important as capability. A device that requires extensive adaptation can slow down development, increase engineering cost and complicate validation work.
The TR-3 Series addresses this with a UAV-oriented design. The platform supports MAVLink and AERO protocols, includes integrated multi-GNSS, a built-in pressure sensor for altitude reference and configurable ADS-B output power. These features help reduce the need for separate components and make it easier to adapt the device to different aircraft and missions.
The Aerobits TR-3 Series includes three compact transceiver variants, each designed for a different surveillance requirement
TR-3A is designed for UAV platforms that require ADS-B-based visibility, position broadcasting and traffic awareness. It provides core ADS-B and GNSS capability in a compact format for professional UAV applications.
TR-3F adds a licensed FLARM transceiver to ADS-B and GNSS. This makes it suitable for mixed airspace environments where FLARM-equipped aircraft may be present, including BVLOS trials, airspace integration projects, validation flights and operations near light aviation activity.
TR-3U combines ADS-B, UAT and GNSS. It is intended for projects where UAT reception, and in some configurations transmission, may be required. This makes it useful for UAT-related testing, demonstrations, regional requirements and development programs.
Across all three variants, the TR-3 Series shares the same design approach: low-power operation, compact form factor, integrated positioning, onboard traffic data reception and transmission, and standard interfaces for UAV integration.
For platforms that primarily need ADS-B visibility and traffic awareness, TR-3A is the natural choice.
For UAVs operating in mixed low-altitude environments where gliders, light aircraft or FLARM-equipped users may be present, TR-3F offers broader cooperative awareness.
For developers working with UAT-related requirements, regional integrations or validation programs, TR-3U provides an additional surveillance path.
This variant-based approach allows UAV manufacturers to choose the right capability without redesigning the entire avionics architecture for every mission.
The TR-3 Series supports several professional use cases:
For BVLOS inspection, mapping, public safety, logistics and industrial missions, cooperative surveillance can provide valuable traffic data to operators, ground stations and higher-level safety systems.
The next stage of UAV development will depend not only on better aircraft performance, but also on safer airspace integration.
ADS-B, FLARM and UAT each provide a different path toward cooperative surveillance. ADS-B supports visibility and traffic awareness. FLARM adds value in environments with light aviation and glider activity. UAT provides flexibility for specific regional and integration scenarios.
The Aerobits TR-3 Series brings these technologies into a compact UAV-oriented platform. With TR-3A, TR-3F and TR-3U, integrators can select the surveillance capability that best fits their aircraft, mission and operating environment.
For UAV manufacturers preparing for BVLOS, mixed airspace operations, flight testing and future UTM or U-Space concepts, this flexibility is essential. Cooperative surveillance is becoming one of the practical building blocks of safer drone integration, and compact transceiver platforms such as the TR-3 Series make that integration easier to implement.
