The 2006 Order Guide lists Option 670: Navigation for PCM, and - new for 2006 - Option 672, Extended Navigation Module. The new Navigation's description cryptically states: "Records route and triangulates vehicle positon in unmapped areas and allows for 'back-track' navigation via GPS and compass coordinates."

In simple English, what does this mean if you never intend to do 'off-roading' in your beautiful new 997?

 

It means you dont need option 672.

 

Its when you go to streets that haven't been updated on the DVD map.

 

It makes an electronic trail of "bread crumbs" for off-road travel to allow you to retrace your steps back to a road that is in the database. Similar to track left on a boat GPS navigation system.

 

Thats for off-roading in a car with how many inches of ground clearance???? OK.

 

That is to allow backtracking if you drive on roads that are so new they are not on the "street database" on the Nav DVD.

 

I ordered the extended NAV...don't know if it's actually available yet though and wouldn't lose sleep over it either way.
The difference in price was about $205 so I figured what the hell.
I wish I could have that attitude with the X51 and PCCB options!