#1…I suppose it depends how you define ‘navigated for.’ If that includes things like charts and navaids, then you've got me beat by a few years. If that means sitting in the right seat of a small plane and pointing at things out the window, then I started doing that when a friend of the family got his pilot's license when I was three years old. Some of my earliest memories are of the cockpit of a plane, and I was following along on the yolk before I could reach the rudder peddles.