The use of technology to help officials make more accurate offside decisions will be tested at the Fifa Arab Cup, which starts on Tuesday.
“Semi-automated offsides” work using between 10 and 12 cameras which collect up to 29 data points for every player 50 times per second.
If it spots a potential offside an alert is sent to the video assistant referee (VAR), who has the final call.
The technology could be used at the 2022 Fifa World Cup.
