| 摘要 |
A method of operating a portable navigation device or navigation system is described, together with a computer program for implementing said method and a and navigation system capable of carrying out that method. The method includes the steps of providing a means by which a user can identify a specific location or location range on the surface of the earth, which may include the current location of the device or navigation system, and at least temporarily storing said location or range in memory. The method includes the steps of presenting to the user a plurality of user-selectable options each indicative of a plurality of transient phenomena, the selection of one or more of which results in the association of that or those phenomena with the identified location or range and the storage of such together therewith as primary information.
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