Hi,
Yes they do have some limitations trying to use them to make decisions in the field.
I prefer to do my planning on a pc at home using a variety of map sources and down load a track to the garmin to use in the cab. I used to use a laptop in my previous vehicle, but the D130 single cab is a bit cramped for that.
If every thing is going pear shaped and I'm geographically embarrassed, I'll get the lap top out to make some decisions.
If the garmin recognises where I am as a road, I'll just use its turn by turn to get me somewhere I know and then carry on.
cheers


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