navigation display is depicting where the airplane is head. this white triangle is the airplane. if i wanted to deviate from my course, i would have to know where i want to deviate and if i knew that, i would just punch it into the computer here using the keypad. okay? and it -- i'll choose an airport here. we'll go punch in a few key strokes. and we've selected into the flight plan. and now the computer is asking me with had white line, do i want to deviate from this course and go this way? >> telling su ahead of time. >> telling you ahead of time. that's something we would confirm with the other pilot. yes, we want to do it. we go ahead and execute that. now you can see the airplane deviating off its course and taking a new course. >> you can see by the movement of the fake sun on the horizon that we are turning. i should point out, erin, it's not a steep bank not like an emergency turn. if you're a passenger in the