France and Germany.
I have plenty of patience when people make mistakes. If I didn't, then I wouldn't be any good as an instructor! (Some may argue that anyway!!)
Inexperience should not be an excuse for incompetence, in the same way that ignorance of the law makes no difference when in a court. There are basic skills that we all should have. knowing how to read a map and to perform lost procedures are some I feel are pretty essential for any competent pilot. If you can't perform these satisfactorily, then off to D&D you go, just don't try and pretend you aren't lost when in actual fact you are and are probably starting to flap as well.
I agree that Nav should be covered on the bi-ennial, in fact I insist upon it, but this is not mandatory.