Drones have onboard GPS and internal compass. They also know what their own flight path was that got them to where they are. Even if GPS was overwhelmed, drone typically wants uppies, not downies, when it looses connection (it goes to pre-programmed altitude, usually put very high to avoid trees/structures/etc.
Ok screw it I just asked AI, here's what it said:
Yes, police can absolutely block a drone's signal and force it to descend. However, they cannot do this whenever they want. [
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Law enforcement agencies use specialized
Counter-Drone Systems (C-UAS)—including portable "drone guns"—to jam the radio and GPS frequencies a drone uses to navigate. [
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How It Works
When police target a drone with a signal blocker, they blast a strong radio frequency toward it. This overpowers the link between your controller and the drone. Depending on how the drone's system is built and what frequencies are blocked, one of two things will happen: [
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- Forced Hover and Land: If the blocker jams both the controller's radio signal and the drone's GPS connection, the drone completely loses its bearings. Because it doesn't know where it is, it cannot trigger its usual Return-to-Home feature. Instead, it will immediately halt, hover in place, and auto-descend straight down to land safely. [1, 2, 3, 4, 5]
- Forced Return to Home: If the blocker only cuts the connection between your controller and the drone (but leaves the GPS active), the drone will perform its normal safety fail-safe and fly back to its takeoff point. [1, 2, 3, 4]
- Protocol Hijacking (Spoofing): Highly sophisticated police units use advanced systems that trick the drone into thinking the police transmitter is its actual controller. This allows them to manually take over the aircraft and steer it away to a secure landing spot. [1, 2, 3]
The Legality
While it is strictly illegal for everyday citizens to own or use a signal jammer, federal law enforcement and authorized police forces hold special exemptions. For example, agencies like the
Royal Canadian Mounted Police (RCMP),
Correctional Service Canada (to prevent prison smuggling), and
major US cities hosting massive events have the legal right to deploy these countermeasures. [
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You will typically see these devices deployed around
high-security areas, including: [
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- Major stadiums and large sporting events (like the World Cup or Olympics)
- Airports and flight paths
- Prisons and correctional facilities
- High-profile political rallies or government buildings [1, 2, 3, 4, 5]
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