After 20+ years of flying I still have to read Gen 3.4 to make sure my calls are correct. (The result of some serious 'beasting' by instructors who held a philosophy that the only thing the majority people really get to judge your professionalism on is the standard of your calls.)
This discussion tempted me to dive right back into AIP for some more refresher reading. I agree completely with the need to follow the book so that there is no misunderstanding between the cockpit and ATC. Interestingly, the examples given on Gen 3.4-15 and 16 contradict the proscription given that:
Radiotelephony pronunciation of numbers shall be in the phonetic
form as follows...9 NIN er
The examples contain few instances of the use of "9" and when they do they appear to be incorrect.
Altimeter Setting...29.95 “TWO NINE DECIMAL NINE FIVE”
Time...0920 UTC “ZERO NINE TWO ZERO ZULU”
Or is there an implied requirement to read the printed numbers in these examples phonetically?