| 摘要 |
A navigation system having a transceiver configured to receive a first GPS location signal corresponding to a geographic location of the navigation system and a second GPS location signal corresponding to a geographic location of a vehicle, a processor operatively coupled to the transceiver, the processor configured to determine a relative distance of the navigation system from the vehicle based on the first GPS location signal and the second GPS location signal, and a user interface operatively coupled to the processor, the user interface provides an alert at a predetermined distance from the vehicle.
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