Well there you go... I always thought it was ICAO Standard RT.
You make a good point though, this reference material is long overdue at EK. Apparently this document is 'in the works' right now. This is what I am told and it is happening because there has been a decline in standard RT by pilots. (regionally and by EK pilots)
To be honest, I don't care if ICAO or CAP413 had stipulated Yank slang as standard either. What I think is important is conformity and standardization. If ICAO/CAP413 decrees that a clearance to squawk 6429 should be read back as ''6429 coming down'', then so be it.
I once read an ICAO document explaining in no uncertain terms correct RT. I was amazed at how many mistakes I had been making and for that reason I made an attempt to fix them. It took about 30 minutes by the way, although I probably still make some improper RT.
In fairness to everyone, pilots are never taught proper RT, except the basics. It is learned by osmosis. You learn from what you hear on the radios, which can vary greatly depending on region. ATC on the other hand is taught proper RT and for good reason, it works best !
And by the way, it is not ''This is Emirates 123, or The Emirates''. There is a reason it is callsign with nothing preceding it. Many different callsigns would begin to sound the same if preceded by ''This is.....or The'' In other words, ATC can more easily pick up on the callsign.
Sorry to hijack the thread, my apologies. I realize some people think it is pedantic and trivial, but I believe it is important. Worst case scenario... I am wrong and improper RT never has and never will contribute to an accident... I still argue that it is so easy to learn proper RT we should do it. I truly hope EK is publishing a suitable document, even though I'm sure a few pilots will disparage it because they believe it is beneath them.
I am aware that some regions use a few variations to standard RT, such as the proper wording to declare a fuel 'urgency vs emergency' state. These variations are published somewhere but overall most of the world complies with ICAO. I do not know for certain, but I would guess CAP413 is almost identical to ICAO.
I cannot think of one valid reason to use NON-standard RT. I can think of one very good reason to use it.... FLIGHT SAFETY. It is the same reasoning behind SOP's and standard calls made within the cockpit.