In my experience in various vehicles, those who can navigate utilize a GPS to spend less time navigating and more time flying and looking. Pull the GPS and they still know where they are, no problem. In fact, they'll have the map in front of them with a thumb near a visible landmark.
Those who cannot navigate spend most of their time following the magenta line head down. Pull the GPS and you are lucky if they have the plate with them which can tell them the frequency to get on to get a QDM.
(The latter category are the ones who will drive their car through three fences and over the edge where the bridge used to be when the navigator database was last updated in 2002.)
In other words, we need to make sure people are confident in their own navigation skills before letting them loose with a GPS.
Yes, I just presented the problem in a way which made it sound like I was giving the solution. Perhaps I have a future in politrickery?
