Maybe it represents the ability to say "Hey you, stay put, or go that other way; the shooter is right around the corner" from, say, an overwatch point or a dron

Maybe it represents the ability to say "Hey you, stay put, or go that other way; the shooter is right around the corner" from, say, an overwatch point or a drone or something? In that case you wouldn't want the shooter to know. Beats waving your arms like crazy. Just spitballin' here.