Non professional barging in here . . .
The seemingly redundant words at the beginning of a radio transmission ("Good morning", "Hello, director" and so on) are very important in one respect: it's well understood that the human ear takes a syllable or two of speech to attune or synchronize to a particular voice. It is sensible not to impart vital information in the first one or two words of a message.
After all, that's why you wouldn't say "Pan" or "Mayday" only once -- if you could help it
