1 is slow, so it is difficult to display it on the navigator screen synchronously. There will be a delay effect of about half a minute. The delay effect will not be eliminated until you run to the speed of the bike.
The navigators used by general air vehicles only have voice prompts of expressway or city streets above the national second level. If you navigate with it in your hand, it will tell you how to go, unless you have to walk on the road where the car is going. Otherwise, it will make you go with the flow.
Ordinary maps are not accurate to villages.
The car navigator in your hand can only display the accurate latitude and longitude data of your position, so it is really inconvenient to use it to navigate and guide the way.