Why is the message “Request frequency change” not “Requesting frequency change”? It just seems like bad grammar, and I’ve noticed it since day 1.
For ex.
Current
Delta 48 request frequency change.
Different
Delta 48 requesting frequency change.
See? The second one sounds more grammatically correct.
The first (and current) one sounds like a command given by ATC, when in fact it’s coming from the pilot’s end.