Sometimes there is a need to be quiet but still one needs to communicate with their group. I have printed off the chart below and posted on the refrigerator (again). Usually a facial expression or look, can let someone know that something is up but I think learning tactical hand signals is important. There is former military everywhere. I do not think it is a wasted skill to know these and practice them with your group/ family. I hope this chart is accurate and has the correct signals.