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When pilots start Navs they overload all too easily, so KISS becomes a necessary instructor self-brief item.
KHOC, (Keep Head Out of Cockpit), is a basic for learning 'situational awareness' - which probably avoids getting lost - which probably avoids running out of fuel -which probably avoids having to use the Forced Landing Checklist !
While I don't disagree with most of the helpful stuff already posted, I'm all for the absolute basics in early navs. Simplifying the task must result in faster learning, and that's what we're here to do.
cheers,