Rand McNally GPS services are loved, especially among truckers. But this doesn’t mean their services are limited and has a wide range of GPS devices and maps to serve all. The reason why it’s necessary to Install Rand McNally Dock is, without it, you can’t update your GPS device. And if you will not update your GPS device then it would be hard for you to travel through unknown routes. https://mapupdates.org/blog/install-rand-mcnally-dock/