FIFA said Friday it is ready to launch semi-automated offside technology (SAOT) that uses multiple cameras to track player movements plus a sensor in the ball—and will quickly show 3D images on stadium screens at the tournament to help fans understand the referee's call.

It's the third World Cup in a row that sees FIFA introduce new technology to help referees.

Goal-line technology was ready for the 2014 tournament in Brazil after a notorious refereeing error in 2010. In 2018, video review to help referees judge game-changing incidents was rolled out in Russia.

The new offside system promises faster and more accurate decisions than are currently made with the Video Assistant Referee (VAR) system, even though the 2018 World Cup avoided major mistakes on offside calls.

Controversy has since flared in European leagues, especially where VAR officials draw on-screen lines over players for marginal calls. They have been mocked as "armpit offsides" because of the tiny margins.

"Although these tools are quite accurate, this accuracy may be improved," said Pierluigi Collina, who leads FIFA's refereeing program and worked the 2002 World Cup final in the pre-technology era.