Qalupalik wrote:
“Go ahead” was dropped from UK phraseology and ICAO Annex 10 at least a decade ago.
So is “pass your message” in Annex 10?
No it’s nonstandard and neither is it a PANS term.
An exact reproduction of ICAO standard terms under para 5.2.1.5.8 Annex 10 vol II may be found in table S14-4 in the SERA under rule SERA.14045.
Ironically the only other large European country that lists pass your message in its AIP GEN 1.7 (ICAO differences) is France.
I wonder what motivated the removal of UNABLE from its lexicon.