Patent ID: 8234059

Claim:
A navigation device having a function to modify a route comprising: an operational object detecting part configured to detect a point or a section on the route as an operational object; an operational object displacement detecting part configured to detect a displacement of the operational object; a path changing part configured to change a path of the route depending on the displacement of the operational object in real time, the path being tentative prior to recommending a navigable route; and a route re-searching part configured to re-search an alternate route based on the changed path, wherein after the path changing part has changed the path and prior to the route re-searching part re-searches the alternate route, the operational object detecting part is configured to detect another operational object within a predetermined time period, if the another operational object is detected within the predetermined time period and displaced, the path changing part is configured to further change the path depending on the displacement of the another operational object in real time and prior to the re-search of the alternate route based on the further changed path, and if the another operation object is not detected within the predetermined time period, the alternate route is re-searched based on the changed path.