Goal-line technology: GoalRef explained

Using magnetic fields around the goal, GoalRef is one of two systems approved by the International Football Association Board (IFAB) in the quest to tackle goal-line technology. http://www.FIFA.com/Football-Technology #Footballtechnology Details about the decision to approve GLT: http://www.fifa.com/aboutfifa/organisation/marketing/qualityprogramme/news/newsid=1659741/index.html More about how Hawk-Eye works: http://www.youtube.com/watch?v=exEHTO-YnuE The important need to have quality-assurance in GLT:

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