Line judges will call all line faults within their jurisdiction and will signify fault by loudly calling “out” and giving an accepted hand signal. Accepted hand signals are: “Out” ball – outstretched arm pointing in direction of the out-of-bounds ball path. “In” ball – arms extended parallel to court with palms down.

Line judges use three hand signals. One two indicate that the shuttle has landed in, another one to indicate that the shuttle has landed out, and the last one to indicate that they have been unsighted and cannot make the call.

Every time the ball lands near a line that you are responsible for, you should be making a signal. When the ball lands on the ground inside the court, you will signal "in". If the ball contacts the ground outside the court and hasn't been touch by a player on that side of the court, you will signal "out".

They use the ‘IN’ signal whenever it lands inside the court. This happens even when a part of the ball touches the line. That’s because the lines are also a part of the volleyball court. Whenever the ball touches or goes over the antennae, they give the ‘OUT’ signal. It is out even if the ball touches the body of the net.