Officials Hand Signals for Indoor

Move the hand to indicate the direction of service.	Extend the arm to the side of the team that will serve.
Raise the forearms front and back, and twist them around the body.	Place the palm of one hand over the fingers of the other, held vertically (forming a “T”), and then indicate the requesting team.
Circular motion of the forearms around each other	Show a yellow card for a warning; red card for a penalty.
Show both cards jointly for explosion.	Show red and yellow cards separately for disqualification.
Cross the forearms in front of the chest, hands open.	Lift the extended arm, the palm of hte hand facing upward.
Raise eight fingers, spread open.	Raise both arms vertically, palms forward.
Make a circular motion with the forefinger.	Point the arm and fingers toward the floor.
Raise the forearms vertically, hands open, palms toward the body.	Slowly lift the forearm, palm of the hand facing upward.
Raise two fingers, spread open.	Raise four fingers, spread open.
Indicate the respective side of the net.	Place a hand above the net, palm facing downward.
Make a downward motion with the forearm, hand open.	Point to the center line or to the respective line.
Raise both thumbs vertically.	Brush with the palm of one hand the fingers of the other; held vertically; USAV: Brush fingers of opposite hand once over palm of vertical hand.
Cover the wrist with a yellow card (warning) and with a red card (penalty).	Lines: Point down with flag.
Lines: Raise flag vertically.	Lines: Raise flag and touch the top with the palm of the free hand.
Lines: Wave flag over the head and point to the antenna or the respective line.	Raise and cross both arms and hands in front of the chest.