How does offline GPS like Garmin works ?

Offline GPS like Garmin, works without any internet service.

So how does it really work ? and how does offline GPS connect to satellites and give us the directions ?

• The GPS system, which is installed in our cars uses a system called GNSS which stands for Global Navigation Satellite System. 
  
  
• Through that system, our car GPS can tell exactly where we are anywhere in the world. 
  
  
• Our car GPS and GNSS uses microwaves to communicate. The GPS has a antenna and the receiver, and also through sensors installed in our car, the exact directions are determined.
  
  
• GNSS is so advanced, that it can also help with real-time traffic details

[July-23-2023]