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I am a very big believer that the most basic handheld GPS can make all the difference IF the user remembers to set a waypoint for their car[/quote]
When a person wants to reliably use that. Itīs best to form the habit of setting the waypoint always when leaving the car. I do it even in the city.

[/quote]I think a GPS with an electronic compass makes it more foolproof if not thinking so clearly.
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I managed to mess up the settings of my GPS one time and switched from bearing to heading. I noticed it because the direction the GPSr pointed to did not agree with the target loction on the map.
Lesson learned: Check plausibility of setting while it is easy to verify.
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If it isnīt broken, it doesnīt have enough features yet.