Hand signals are important when people cannot hear each other or do not want to be heard.

He often makes the same hand signal at least 50 times a game.

She had never seen a point man use such hand signals.

She was clearly going to fire, but I stopped her with a hand signal.

When at a loss for words, however, he found hand signals worked fine.

The problem was that she didn't see the hand signals.

Let them try to break the tiny hand signals, though.

I knew all his hand signals by now, so there was no question of it.

The hand signal obviously was supposed to mean something to him.

They are most often in radio contact, and always use hand signals.