https://gamesandtehories.blogspot.com/ Kimmo Huosionmaa The vulnerabilities of GPS systems have been noticed, and that system has many weaknesses. The use of satellites makes it vulnerable to ASAT (Anti Satellite)-missiles, and another kind of weapons. That's why the military forces of the world are looking for the replacement for GPS. Even if the new systems, what bases the jumping frequencies are more immune to jamming than old systems, the replacement, what does not need satellites are now under the development. Quantum compass might replace the GPS because it's immune to jamming systems. The major weaknesses of the GPS are the system uses satellites for giving the position of the point. And this is why GPS is quite easy to jam, and the other weaknesses are that the system cannot be used in underground or EMP-protected places. Also, northern lights are disturbing that device, because they form ion layer in the top of the atmosphere. This means that the operators, wh...