<Tr> <Td> Wing Defence </Td> <Td> WD </Td> <Td> Centre and defensive third excluding goal circle </Td> <Td> Usually defends against the Wing Attack . Often involved in blocking offensive plays from the opposing team, and may also be called upon to guard against the Goal Attack or Goal Shooter by preventing them from entering the goal circle . </Td> </Tr> <Tr> <Td> Goal Defence </Td> <Td> GD </Td> <Td> Centre and defensive third including goal circle </Td> <Td> Usually defends against the Goal Attack . Main role is to assist the Goal Keeper in defending the goal against the opposing shooters . </Td> </Tr> <Tr> <Td> Goal Keeper </Td> <Td> GK </Td> <Td> Defensive third including goal circle </Td> <Td> A specialised defensive position . Often the last person who can keep the opposing shooters from scoring . Also responsible for taking throw - ins in the defensive third of the court . Accuracy in passing and predicting where the ball will go are keys to playing this position well . </Td> </Tr> <P> When a goal is scored or at the start of a quarter / overtime, play is resumed from the centre of the court using a "centre pass". These passes alternate between the teams, regardless of which team scored the last goal . A centre pass is made by a player in the Centre position who must have one foot grounded within the centre circle . As the game restarts, only the two Centre players are allowed in the centre third: when the umpire blows the whistle to restart play, the Goal Attack, Goal Defence, Wing Attack and Wing Defence players can move into the centre third to receive the pass . The centre pass must be caught or touched in the centre third . </P>

Who does the goal shooter mark in netball