'standby'
Pretty sure this may have been covered already, but when ATC tells us pilots to 'standby', you want us to shut up and keep the frequency clear. You don't need us to acknowledge you've told us to shut up. Right ?
I've had disagreements with a couple of instructors about this, with them saying I should reply with my call sign at the very least. So I was hoping there a reference specifying this in any ICAO manual. I cannot seem to find explicit instructions to this effect if ICAO Doc 4932 or the UK CAP 413.
Any help greatly appreciated.