AFL Football Operations Manager Mark Evans says the current video goal review system isn't "perfect" and can't gurantee it will remain until the end of the season.
The AFL is investigating the use of microchipped ball to solve the recent goal umpiring and score review controversies. Picture: Michael Klein
MICROCHIPPED footballs could be the answer to the AFL's goal-line review woes, but league football operations boss Mark Evans says there is no technology currently available that suits the code.
Evans yesterday admitted the system, again under fire after Tiger Matt White's shot on goal appeared to cross the line but hit the goal umpire and rebounded into play, wasn't perfect but it expected it would remain for the rest of the season.
Geelong's Billie Smedts kicked what most believed to be a long goal against the Bulldogs on Saturday, only for it to be judged to have hit the post -- with no review called.
Evans said 1 per cent of scores were reviewed and said the league was considering options, including new cameras and a microchipped football.
"My personal view is that microchipping the ball will lead us down the path towards a better solution," Evans said.
"But there are other systems that are camera-based systems, some that triangulate where the position of the ball is and others that use a magnetic force.
"We'll look at all of those, but at the moment the clear message is there's no system out there . . . that covers the complexities of our game."
Evans said a system soon to be introduced for soccer's World Cup would cost $250,000 to fit out each stadium, and up to $4000 a match to run.
"The question for us is, does it actually suit our purposes or not? We'll talk to those people and see whether they could perhaps even come out and run a trial for us," he said.
Evans said he was unsure when a new AFL system could be in place or how much it would cost.
"That's dependent on when we can find the right technology first of all, then I think you'd need to have an appropriate time period where that's tested," he said.
He also said two goal umpires at each end wasn't the answer.
Evans gave qualified support to the system remaining while the league assessed better technology.
"There are two options for this year, really. You can either run the system that we have got or that you can get rid of it and go back to the goal umpires' call," he said.
"The system is there to prevent a couple of howlers.
"At the moment we have a system where we can correct the absolute errors and that's got to be better than not having it at all, at the moment.
But later, Evans answered "no" when asked if he could guarantee the current system would stay for the rest of the season.
Evans said video evidence this year was more inconclusive than last year, when the review system was introduced.
"Last year the camera system showed about two-thirds of them (the reviews) were conclusive -- either backing the goal umpire's original view or changing that view on the odd occasion," he said.
"This year the vision seems to be much more skewed to being inconclusive.
DISPELLING CONFUSION, ERRORS - AN ADMIRABLE GOAL
Some options open to the AFL on goal-line adjudication
GoalControl
Will be used at the Confederations Cup in June and, if a success, next year's FIFA World Cup
* Fourteen cameras mounted on the stadium roof and focused on both goal mouths. Captures three-dimensional position of the ball. When the ball crosses the goalline, referees' watches vibrate and light up.
Hawk-Eye
To be used in the English Premier League next year
* Seven cameras on each goal, the most common location on the roof but can be flexible. As soon as the system detects that the ball has crossed the goalline, it sends a signal to officials' watches.
GoalRef
Was considered for FIFA World Cup
* Uses a chip in the ball and low-frequency magnetic fields. Goal message is sent instantaneously to referees' watches.
CAIROS
Was considered for FIFA World Cup
* A magnetic field is created behind the goalline. Cables are installed in the turf to generate the field. Sensors in the ball recognise the magnetic field as soon as the ball comes into them.
Four goal umpires
* Ron Barassi has been talking about it for decades and it was trialled in the 1996 pre-season. AFL football operations boss Mark Evans isn't a fan: "Having two goal umpires won't solve whether the ball has been touched off the boot or touched in flight."
Old school
Two goal umpires. That's it.
* Unlikely AFL will go back to the future.
Status quo
* Current system. Two umpires, with video review open to field umpires and stand officials. Vision pulled from match broadcasters.
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