You can't use the navigation system while the car is moving even if a person is in the front passenger seat. The darn airbags know someone is sitting in the seat, shouldn't the navigation system know it too? I'd accept this compromise in spite of my real feelings that the driver should be able to use it while moving. The safety argument is nonsense, since pulling over on the side of the highway is not exactly safe.
Fix the stupidity that is in the navigation system preventing it from being used while the car is moving.
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