The military has gps technology accurate to approximately 1 millimeter. conventional gps units (like the one in your car) are accurate to about 15 feet.
GPS on phones are very accurate. They work just as good as a regular car GPS because they both work off of a satelite that feeds them information.
If it is your car no, the GPS is also yours to do with as you wish.
A car GPS navigation system typically offers larger screens for easier viewing, dedicated GPS signal reception for more accurate directions, and integration with the vehicle's systems for convenience. On the other hand, using GPS on your phone is more versatile, as it can be used for navigation both in and out of the car, and often includes real-time traffic and map updates.
It depends where and how often the device downloads the GPS information. Streets and roads are always changing, so the GPS device must download updates to be accurate.
An in-dash gps system would be better in a car. Handheld gps systems seem to generally have smaller screens and are made specifically for outdoor use. An in-dash gps is designed for in car use.
gps
The Garmin approach s1 GPS watch is a more portable alternative to the traditional car based GPS system. The portability of the GPS watch is its biggest advantage. Unfortunately it does not have all of the capabilities of a car based GPS system.
Yes, it can be tracked. Just call the manufacturer with the gps system's serial number or the car manufacturer to get info on the gps system.
It is not recommended or legal to be using anything handheld especially a GPS system in a car while driving. However, passengers can help by using the handheld GPS system for you instead.
There are many online shops that provide GPS system for cars. Amazon.com is one of online shop that provides GPS system for cars. You can visit www.amazon.com
You could, of course, use your phone as your in car GPS system. There are plenty of items available that allow you to attach your phone to your dashboard.