Shooting at new range, the RO (whom I do not know) says "are you ready". Long interval I turn and he hits buzzer. I do not start, but ask what is going on? He says you have to nod your head when ready. Long discussion. Others chime in seems that is the local custom. I have to nod when we get back to business. Later I get rule book out, cuts no ice. Haven't been back there since.