Russia lost big secret jammer device. Russia lost big secret jammer device.“The Krasukha-4 has an operational range of 186 miles and is designed to target radio-electronic systems of airborne systems such as unmanned aerial vehicles (UAVs) as well as missile systems. The system can also counter airborne warning and control systems (AWACS) that U.S.-led allies of Ukraine use on their drones as well as spy satellites. Additionally, the mobile system can be deployed to jam ground-based large radars and shield Russian assets from surveillance systems.”