Modular navigation system

摘要

A navigation system for providing navigation information to a user responsive to user commands includes (1) a user device for issuing user commands and displaying a user interface to the user and (2) a navigation device for connecting to the user device and receiving user commands from the user device and transmitting navigation information to the user device. The information received from the user device includes updated map information, traffic information, news information, weather information, event-related information, business-related information, and user-specified information. The navigation device performs route following based on commands received from the user device and transmits routing instructions to the user device. The navigation device and user device are separately operable by a user.