Determine the disadvantages of GPS system
- Maps not up to date hence instructed to carry out an incorrect manoeuvre (for example turn into a road that no longer exists)
- Unless the system is very sophisticated, road closures because of accidents or road works will cause problems to a sat nav system
- Potential interferences from external sources (main problem on aircraft)
- Signal loss can cause problems with GPS systems
- Incorrect start/end point keyed into system.