Hockey official is a term used to refer to the people who officiate hockey games. The two most common positions are Linesman and REF, both of which have 8 and 3 letters respectively. A Linesman is responsible for calling offsides and icing, as well as helping the Referee with other duties. The Referee is the main official in charge of the game, and is responsible for making calls on penalties, goals, and other infractions.