Google Cacheing maps not working as I thought it would

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I have the WiFi only Tab 2 7inch.

I cached some Google Maps around my town. I can locate myself with GPS by loading the maps, but I can't use navigation. Is that correct? I thought the point of being able to cache maps was to be able to navigate without a data connection?

It's normal. Maps requires a connection to calculate the routes. If you want to, you can set up the route when you have wi-fi access and the route (and adjacent roads) will be cached automatically. Then you can navigate offline.

Otherwise, you need internet access.