Doug wrote:
Do you have to hook it to a computer inbetween aviation mode and
enhanced auto mode?

No. Just a button push. I use mine in the car frequently and find the road
navigation is fine, but the list of nearby restaurants etc goes out of data fast
and the database updates don't come out very often. It will often point you at a
restaurant that "used to be right here". I don't think that problem is unique to
the 396, though.

You can fit about half a state worth of detailed road data on the flash card. If
you're travelling out of town, you need to tediously download the data for the
area where you're going. If I were driving to Atlanta, for example, I'd download
all the areas along the interstate that I intend to travel, plus the Atlanta
area. By download, I mean from my PC to the 396 flash. Don't know whether you
can upgrade the size of the flash, I have the one that came with it.

Dave