[chacha102]

That is absolutely a fair point. Speaking as someone who does not have military experience, I can't speak to it. But it would make sense that if you have the time to wait for them to repeat the phrase, that the longer phrase "SAY AGAIN" could be used.

Whereas "REPEAT" might not involve the time luxury.

[remarkEon]

Been a while, but there’s an entire script you read when calling in artillery. It’s designed to be simple, so the dumbest joe can figure it out, and verifiable so that the chances for mistakes or releasing a round by accident are minimized.

[pm3003]

Exactly. In the French Navy they even call it an artillery mass (like a church service). There are similar procedures for surface engagement by a fleet (but not used as much today because of tactical data links).

Minimizing the risk of a mistake and coordinating fire between units is more important in naval warfare than reaction time. In Anti Air Warfare it is different.