[Al Skierkiewicz]

Alex,
You may not need to know the direction for the entire match. It will help target the robot or perform whatever auto function you want to run during the auto period. If you know where you are at the start of the match then you can move to another point on the field if you know distance traveled and direction you traveled.
It would also be useful if you are using the camera to shoot so that you can know where you are in relation to the goal. i.e. The robot is pointed here but the camera says I should be pointed 30 degrees to the left, so turn left another 30 degrees.