EOS C

The EOS C is a vertical takeoff and landing (VTOL) unmanned aerial system (UAS) manufactured by Threod Systems, an Estonian defense technology firm. First introduced in 2016, the platform is designed for short-to-medium range tactical reconnaissance, surveillance, and target acquisition. It serves as a compact, hand-launched fixed-wing drone capable of operating in harsh environmental conditions, filling a niche for military units requiring rapid deployment and persistent intelligence, surveillance, and reconnaissance (ISR) capabilities without the logistical footprint of larger aircraft.

Technically, the EOS C VTOL is a fully electrical aircraft that combines the vertical lift of a rotor with the efficient forward flight of a fixed-wing airframe. The system is equipped with Threod’s proprietary eOpic-5 electro-optical payload, which integrates a Full HD daylight camera with low-light near-infrared (NIR) capability and a thermal imager. This payload features precision mechanical stabilization and onboard processing software that provides real-time object and scene tracking, as well as image enhancement. The drone’s flight control system is fully autonomous, utilizing waypoint navigation and fly-by-camera modes. It includes safety features such as programmable failsafe routes, automatic return-to-home functions, and dead reckoning for navigation in GPS-denied environments. Communication is handled via digital MIMO/MANET/MESH data links operating in the 2.2–2.5 GHz or 4.4–4.9 GHz bands, with AES-256 encryption and optional anti-jamming systems, including CRPA antennas, to maintain Command and Control (C2) connectivity under electronic warfare conditions. The ground control station unifies mission planning, flight operation, and payload control into a single interface.

Threod Systems reports that the EOS C has been adopted by multiple armed forces, including seven NATO member states and Ukraine. The company states the system has accumulated thousands of hours of battle experience. In Ukraine, it has been utilized for frontline reconnaissance and artillery spotting, leveraging its low observability and resilience in contested electromagnetic spectra. The platform’s ability to operate from small teams, including special forces or dismounted units, allows for rapid deployment, with takeoff preparation taking approximately four minutes for trained operators.

The EOS C VTOL distinguishes itself from standard fixed-wing drones through its vertical launch and recovery capability, which eliminates the need for runways or catapults. This makes it suitable for urban environments or rugged terrain where traditional UAV infrastructure is unavailable. Optional features include an IMSI catcher for mobile phone detection in border zones. While specific combat losses or detailed operational statistics are not publicly itemized, the system’s integration into NATO forces and its active use in the conflict in Ukraine underscore its role as a versatile tactical asset in modern hybrid warfare.