Apologies for the thread hijack, but:
What is the notional difference between an "officer" and an "air officer"?
I notice the distinction is even made when people are sworn into the army or the RAF (for the army it's "officers and generals", for the RAF it's "officers and air officers", if memory serves).
I therefore assume there's some sort of special distinction, but I don't know what it is.
End of silly question 'o the day.
P