I think the question that has to be asked is what is the specific deficiency? What if navigation skill is like a 3 legged stool that needs all 3 legs to work?

I think the question that has to be asked is what is the specific deficiency? What if navigation skill is like a 3 legged stool that needs all 3 legs to work? Different people could be missing a different leg. For instance in my case I'm actually better at steering an RC car or similar than I am at figuring out which way I should turn myself. To the point that sometimes when I'm lost, trying to relate a map on the wall to hallways in a building, my best strategy is to step outside myself and say, "OK if there were a mouse in a maze which way would the mouse have to turn here?" Often, the answer I get from doing that is different from what my brain tells me I myself should do; always, it is my first-person reasoning which has it wrong and the 3rd-person reasoning which is right.