Default Can I have Google Navigation on while driving?

I want to be able to have the Google Navigation app open when driving, but without me having input a waypoint. I sorta want it just in free mode when I'm driving around. I've been using the Google Maps itself and it's great, so I don't want to change a navigation app either.

Is this possible at all? Or will I have to resort to another app. (I want NFC to launch up free roam navigation when I put it on my car dock)

Edit: On Nexus 5