GPS jamming by hijackers

[George K]

https://www.zdnet.com/article/criminals-are-using-gps-jammers-to-hijack-trucks-and-down-drones/

The core problem for any system using GPS is that the signals are extremely weak, an inevitable byproduct of the vast distances those signals need to travel. Jammers work by overpowering GPS signals by emitting a signal at the same frequency, just a bit more powerful than the original. The typical jammers used for cargo hijackings are able to jam frequencies from up to 5 miles away rendering GPS tracking and security apparatuses, such as those used by trucking syndicates, totally useless.

In Mexico, jammers are used in some 85% of cargo truck thefts. Statistics are harder to come by in the United States, but there can be little doubt the devices are prevalent and widely used. Russia is currently availing itself of the technology to jam commercial planes in Ukraine.

[Copper]

You should always have backup navigation.

The pre-GPS stuff is much more fun.

But few want to use it.