Volleyball-Hawkeye gets European OK, Olympics may follow

I knew that will not be used in London,but for the world championship 2014.

It is now safe,there will be no OG 2012 in London, perhaps to WCH 2014.

It is not easy to use for all,we need to experience.

@HLCT, I agree, and I also think that a TV doesn't used to trasmitt volleyball probably doesn't have people qualificated enough to performe this system... Unless Polsat will offer his guys, I don't think it will happen, but I honestly hope for it ?

Probably twice per a set? If you are right you still have two challenges, but if you are wrong you lose one. I'm not sure.

Is there in Poland any limitation how often one team can ask for a "challenge"?

You can't check if the ball touched the block. You can check if player crossed some line, if it was out or not, if player touched the net

Can you explain me, that can be used in every situation or only when they have to call "is it out or in". Because for example if you use it to see if there is a touch of the block, that will be very hard because even in slow mo you can't still see that.