Patent ID: 7142978

Claim:
A turn-by-turn navigation system for a vehicle, comprising: a control unit having a visual display and destination selection controls; a processor electrically coupled to the control unit and configured to receive destination selections from the control unit; an internal disk changer coupled to the processor and configured to simultaneously accept both audio and navigation disks, wherein the internal disk changer comprises at least one dedicated slot for the navigation disks, and wherein the navigation disks are configured to provide a database comprising road network/address information; and a vehicle location apparatus configured to input vehicle location data to the processor; wherein the processor is configured to generate route information on the visual display between the vehicle location and a selected destination based on received vehicle location data from the vehicle location apparatus, on received destination selection information from the control unit, and on received road-network/address data from the database, and wherein the processor is further configured to access the navigation disks in the internal disk changer without interrupting playback of audio tracks obtained from the audio disks.