Method for operating a navigation system and data carrier for a navigation system

The navigation system has a data memory, especially a replaceable one, and an output unit (2) for outputting navigation information. The method involves outputting at least one item of auxiliary information different from the navigation information during operation of the navigation system, e.g. before starting to output navigation information or between items of navigation information. AN Independent claim is also included for the following: a data medium with data for a navigation system, especially a satellite navigation system.