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Published online 6 November 2002 | Nature | doi:10.1038/news021104-6

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Microwaves track football

Shin-pad transmitters could end controversial offside rulings.

A new system to monitor the positions of football players and the ball could make the game a lot less controversial. It can instantly alert referees, fans and coaches to whether a player is offside, or the ball has left the pitch or entered the goal.

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