So what happens when the satellites go down? Are you going to be lost for the time they don't work?How would using a map make that any faster? You can end up using a map or GPS for minutes at a time. Same thing; same result too. GPS may be better. It guides you so you don't have to stop or pull over to view the map! As a matter of fact they should be built IN to delivery vehicles globally, by government demand. It serves a right. Just like backup cams are required on each car, and van made in 2015 and up. Actually.... those types of things should be invested in voluntary.