The system uses the smart speller to narrow entries according to the contents of the navigation database.
The system provides lists of possible destinations based on the input. For example, entering "Birch Street" generates a list of all cities with a "Birch Street" in the database.
As a minimum, the system requires either a postal code or a city and state. If a street address is not entered, the system navigates to the city center. Requirements may vary slightly according to region.