The booming field of commercial drones has also taken a hit. Drones often rely on GPS for navigation and security tracking, which makes them especially vulnerable. Drones equipped with alternative methods still often rely on GPS to locate, navigate and maintain stability, making gps blocker a tool for shooting down drones with the potential to cause damage to life and property. A jamming device brought 46 drones down from the sky during a light show in Hong Kong in 2018, drawing public attention.