In a photo opportunity at Arsenal’s Emirates Stadium on Thursday, the Barclays Premier League unveiled the Goal Decision System technology that will be used in all 20 stadiums this season.
The Guardian reported that the league spent more than £2 million to install the Hawk-Eye cameras in every stadium. Video boards inside the grounds and on broadcasts will show the location of the ball and the proper call (goal or no goal) in a way similar to tennis court technology:
— Premier League (@premierleague) August 8, 2013
Hawk-Eye is the same system in use in tennis and cricket to track the ball and display its path for match officials to use in determining correct calls in game situations.
Seven cameras at each end of the stadium, usually on the roof, track the ball as it comes into range and determine when the entire ball crosses the entire goal line. Within one second, the outcome is displayed on a watch the head referee will wear during the game.
It is accurate to within 4 millimeters, which is much better than the FIFA required margin of error of 3 centimeters for goal-line technology.
In the Premier League alone last season, the new technology would have been used on 31 different occasions, three of which would have reversed the referee’s initial decision on the field.
After Sunday’s Community Shield at Wembley between Manchester United and Wigan Athletic, fans and officials will have a better idea of how the system works, as it is designed to give a signal and make a video representation available anytime the ball crosses the line.