What is the correct or permissable procedure in Australia for saying an aircraft callsign where all three letters are the same.
For example if the callsign was VH-AAA.
Is "Triple Alpha" acceptable or is each letter of the callsign required to be transmitted phonetically.
My reason for asking is I heard some time back, an aircraft with this type of callsign being most upset when told over the radio that he was no longer to refer to himself as "Triple***"
However more recently that method seems to have crept back in.
YPPH controllers know which callsign I mean
