Radio navigation is the name of the game when you are flying a DC-9. Radio navigation, like all new things in life, can be difficult to understand at first. But once you have mastered it, it becomes second nature and you will have a much better mental picture of where you are, where you are going, and how to get there.
What exactly is radio navigation? In short, radio navigation is the art of locating your position on the earth by use of radio waves. Radio waves can be used to find direction (bearing), distance (ranging) and also velocity to or from a station.