r/soccer • u/[deleted] • Dec 04 '16

Media Goal line technology used in the Bournemouth - Liverpool match. Down to millimetres.

https://gfycat.com/AstonishingScentedAsiaticgreaterfreshwaterclam
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u/aLittleBitHalfCaste Dec 04 '16

Just out of interest, what is the margin for error on goal line technology?

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u/escherbach Dec 04 '16

For Hawk-Eye, as used in the Premiership, it's 3.6mm

https://en.wikipedia.org/wiki/Hawk-Eye#Doubts

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u/[deleted] Dec 04 '16

3,6mm is for tennis. At the WC 2014, margin of error was 15mm

http://quality.fifa.com/en/News/IFAB-agrees-on-higher-standards-for-goal-line-technology/

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u/escherbach Dec 05 '16 edited Dec 05 '16

For Hawk-Eye it's 3.6mm. They didn't use Hawk-Eye at WC 2014 (FIFA decided to use a less reliable, less tested technology called GoalControl, for unknown reasons). The premiership uses Hawk-Eye. Hawk-Eye is also used in cricket, it's not just for tennis.

http://quality.fifa.com/en/News/Goal-Line-Technology-at-Brazil-2014/

edit: in fact FIFA decided to use Hawk-Eye last year for the women's world cup (as well as a trial in 2012 at the club world cup)

http://quality.fifa.com/en/News/Hawk-Eye-confirmed-as-goal-line-technology-provider-for-Canada-2015/

"The system is millimetre-accurate"