Lithuania tests Ukrainian SkyFortress acoustic system to detect drones and missiles

Deployment of the SkyFortress system

Lithuania has started testing the Ukrainian-developed SkyFortress airspace surveillance platform to enhance its detection of unmanned aerial vehicles and cruise missiles. Lithuanian Defence Minister Robertas Kaunas announced the pilot program on 2 October 2026, stating that the Baltic country is integrating technology that has demonstrated operational value in active combat. Lithuanian defence authorities selected the software to reinforce their national security framework against low-altitude intrusions without having to design entirely new observation equipment from the ground up. The platform relies on artificial intelligence to detect, track, and classify airborne objects using acoustic and electromagnetic signatures in real time. The initiative follows a bilateral agreement finalized during the summer of 2026, which covers software access, sensor data processing, digital signature libraries, and military operator training.

Air threats are changing dynamically, which is why we are making appropriate decisions. Instead of creating everything from scratch, we are adapting systems that already operate in Ukraine. In this way, we consistently strengthen the entire air defence chain: from airspace surveillance to intercepting and neutralising air threats.

Sensor architecture and artificial intelligence

The SkyFortress platform fills the initial observation and detection phase of Lithuania's layered air defence structure. Low-flying drones and cruise missiles frequently evade standard radar coverage by flying at minimal altitudes, creating a critical requirement for passive tracking mechanisms. SkyFortress addresses this operational gap by continuously monitoring sound waves and radio frequencies emitted by passing propulsion units and onboard electronics. The software matches live sensor readings against digital libraries containing open-source acoustic and radio frequency signatures. By processing this incoming telemetry with artificial intelligence algorithms, the system classifies detected flying objects in real time and relays tracking data to military command networks for downstream interception.

SkyFortress supplements the first stage of this chain, surveillance. The system detects and tracks low-flying drones or cruise missiles with the help of artificial intelligence.

Regional airspace violations in the Baltic region

The acquisition follows numerous airspace incursions across the Baltic states during the ongoing war between Russia and Ukraine. Lithuania, Latvia, and Estonia have all registered foreign unmanned aerial vehicles crossing their borders in recent months. Russian military drones operating from Belarus have entered Lithuanian airspace during regional operations. In addition, Ukrainian long-range strike drones directed at oil refineries and energy infrastructure in northwestern Russia have drifted off course into Baltic airspace after being jammed by Russian electronic countermeasures. In September 2026, Lithuania carried out its first kinetic shootdown of an unauthorized drone that had penetrated national airspace, following earlier similar incidents reported in Latvia and Estonia.

Pilot evaluation and personnel instruction

The current testing phase focuses on verifying how effectively the acoustic arrays identify and categorize low-flying unmanned craft within Lithuania's specific terrain and atmospheric conditions. Lithuanian military specialists are conducting comprehensive personnel training under the terms of the summer contract to ensure proper maintenance and operational readiness. Technical teams are evaluating the speed with which acoustic sensors and electromagnetic receivers process signals and deliver actionable tracking information to air defence units. Lithuanian authorities plan to evaluate performance data throughout the pilot phase to determine future integration requirements for broader monitoring networks along the nation's borders.