| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a navigation device that easily retrieves a point which can be used for a long time. <P>SOLUTION: Usable time calculation means 28 calculates a usable time of a point detected by point retrieval means 19 based upon usable time information on the point stored in usable time information storage means 11, a necessary time to get the point that necessary time calculation means 26 calculates, and current time. List display means 20 displays a list of points in a decreasing display order of calculated usable times. <P>COPYRIGHT: (C)2012,JPO&INPIT |
