[parepat]

I think I disagree with most of the posts here. Assuming both the official and a player can run a 6 second forty they can cover 10 yards in a second and a half. Thus, if an official is 20 yards ahead of a play and needs to come back the play. He can get within 10 yards of the runner within 3/4ths of a second. However, once a player is beyond you, you will never get closer to the play. On a 50 yard play it is unlikely that you will be able to see a close out of bounds play. THus, I believe that by moving down field, the official has a better opportunity to be in good position for more plays. Therefore, I would have my wings head down 15 yards if not threatened and work back to the ball.