Referee Equipment
The whistle and other signalling devices
The whistle is obviously the most striking tool of a referee besides the red and yellow cards ... more
Other referee accessories
The yellow and red warning cards were introduced at the 1970 World Cup in Mexico as a consequence of the controversial match between Argentina and England at the 1966 World Cup ... more
Electronic positioning systems for players and ball
Many recent applications aim to provide referees with electronic aids for decision making
...more