After just three postings this thread is turning into "charlie, charlie" blah, blah.
jees`.
I do understand Ali Bin Somewhere well, it doesnīt matter if you are tired or you have a low moral just do a professional ATC thatīs what everybody can expect from you, there might be the safety of a flight affected. Everyone is working for his own professionality, and as the skies are becoming more and more crowded we need some discipline. There are also the ATC guys working the nights, my opinion only.
Found the following regarding the "Charlie Charlie".
"CC Means "I understand." CC is an abbreviation for "click click," Comes from a pilot habit of pressing the mic button to confirm an order rather than actually replying."
http://www.hq.wwiionline.com/guides/dictionary.shtml
hope this helps
cheerio Miss Sophie