Football officials are responsible for ensuring the rules of the game are followed and that the game is played fairly. The most well-known football official is the REFEREE, who is seven letters long and is the leader of the officiating crew. The REFEREE is assisted by a REF, which is three letters long, and two linesmen, which are eight letters long. The linesman's job is to watch the line of scrimmage and make sure players do not cross it illegally. The field judge, which is ten letters long, is responsible for watching the action on the field and making sure all players are following the rules. Finally, the head linesman, which is twelve letters long, is responsible for watching the sidelines and making sure players do not go out of bounds.