Warning device for navigation system of motor car, has monitoring unit monitoring first temperature information and second temperature information to detect flash ice information

摘要

The device has a monitoring unit (10) monitoring first temperature information (12) and second temperature information (14) to detect flash ice information (16). The monitoring unit is provided to determine the flash ice information in dependence of a size of the time or spatial difference in temperature, wiping process information (20) and rain sensor information (22). The monitoring unit is provided for acquiring a geographical location position (24). An output unit (28) is provided to output the output information (30) based on the flash ice information. Independent claims are also included for the following: (1) a navigation system (2) a method for determining a flash ice hazard.