Patent ID: 7209828

Claim:
A navigation apparatus for a vehicle comprising: a registration means for registering a place of departure, a destination, and a route traveled by the vehicle; a determination means for determining whether an input place of departure is substantially the same as a place of departure of a registered route and an input destination is substantially the same as a place of departure of the registered route, an input place of departure being substantially the same as a place of departure of a particular registered route and an input destination being substantially the same as a destination of the particular registered route when the input place of departure is within a predetermined distance of the place of departure of the particular registered route and the input destination is within the predetermined distance of the destination of the particular registered route; a route search means for reading out the particular registered route from registered route information and for returning the read out particular registered route without performing a search; and a control means for performing route guidance based on a route returned by the search means; wherein if it is determined that it is impossible to travel one or more portions of the read out particular registered route, the route search means is also for: searching, for each of the one or more impossible portions of the read out particular registered route, for a route around that impossible portion of the read out particular registered route; and returning a route comprising all portions of the read out particular registered route that are possible to travel and each of the searched for routes around the one or more impossible sections of the read out particular registered route.