onmost new aircraft there are difft colors to show what nav aid you are using on the lear jet 45 green data is raw data in and yellow is both people are getting there info from the same fms and mengnta is info from two differnt fms .so when you set up a dep. you set up the fms and fly the fms but if the box goes out you now can go to green data mode and fly the route useing cross ref.vors on route.remember the way we use to fly aircraft