Abstract: A navigation system in a subject vehicle for organizing a navigation route having a blind alley toward a destination in map data as a route guidance by using a node and a link includes a blind alley detection means for detecting the blind alley in the navigation route, and a blind alley specific instruction means for providing a blind alley specific instruction upon detecting the blind alley. The subject vehicle is navigated to travel in reverse for one of entrance into and departure from the blind alley according to the route guidance.

Abstract: A navigation system executes a portable mode for guiding a person when a GPS antenna is connected with it and a speed signal has not been inputted for ten seconds or more. The portable mode enables a predetermined function being nonfunctional in an in-vehicle mode for guiding a vehicle while it disables a predetermined function being functional in the in-vehicle mode. It furthermore modifies, for the portable mode, a predetermined function set in the in-vehicle mode. The navigation system can thereby utilize functions suitable for guiding a person-guiding instead of guiding a vehicle, which effect enhances usability of the system.

Abstract: A navigation system executes a portable mode for guiding a person when a GPS antenna is connected with it and a speed signal has not been inputted for ten seconds or more. The portable mode enables a predetermined function being nonfunctional in an in-vehicle mode for guiding a vehicle while it disables a predetermined function being functional in the in-vehicle mode. It furthermore modifies, for the portable mode, a predetermined function set in the in-vehicle mode. The navigation system can thereby utilize functions suitable for guiding a person-guiding instead of guiding a vehicle, which effect enhances usability of the system.