Demystifying football's most sophisticated officiating technology. Explore how 12 optical cameras, 29 skeletal limb points, and 500Hz connected match balls eliminate human error in offside calls.
Simulate attacker positioning relative to the second-last defender and test Law 11 active involvement.
Mounted high beneath the stadium canopy. Synchronized at 50 frames per second, continuously tracking the 3D coordinates of all 22 players and the match ball.
AI computer vision algorithms map 29 anatomical points per player—including toes, knees, hips, shoulders, and head—every 20 milliseconds to identify scoring limbs.
A rechargeable suspension sensor inside the official ball detects motion data 500 times per second, establishing the exact frame the ball was kicked with sub-millisecond precision.
Within 25–40 seconds of a confirmed offside, the system generates a 3D animated replay broadcast to stadium video boards and television viewers worldwide.
A defender has clear vision, time to coordinate their body, and intentionally passes, controls, or clears the ball. Even if the clearance is poorly executed, the offside status is reset.
A ball moving with high speed hits a defender reacting instinctively, or rebounds off the goalkeeper's save. The offside attacker is not onside and must be penalized.
No. Under IFAB Law 11.3, there is strictly no offside offense if a player receives the ball directly from a throw-in, a corner kick, or a goal kick.
Under the VAR delay protocol, assistant referees keep their flag down during immediate goalscoring opportunities to allow the attacking sequence to conclude. If a goal is scored or the chance ends, the flag is raised, ensuring valid goals are never mistakenly blown dead prematurely.
No. SAOT is 'semi-automated' because human VAR officials must verify the automatically calculated kick-point and line placement, and determine subjective decisions such as whether an offside attacker interfered with the goalkeeper's line of vision.