1. Skip to content
  2. Skip to main menu
  3. Skip to more DW sites
Live TV
Latest audioLatest videos
In focus
Press freedomIsrael-Hamas warRussia's war in Ukraine
Science

The Tomorrow Today Viewer Question

December 8, 2014

Glenn Constantino from the Philippines wants to know: "How does the GPS navigation system work?”

https://p.dw.com/p/1Dzxh