I kind of feel for the arty observer and the officer.
If that piece of artillery are used for continuous/sustained support fire.
You know, the standard procedure is for a Arty Officer call on the radio for "Rounds Away" 3 times each time a round is launched
and the Observer would have called "Rounds out" a couple of time, Then the arty officer will come back and call "Splash over" and the Observer will call out "Splash out".
Now imagine a few of this gun is used to fire on a support mission.
You will hear nothing but an alternate round of words of "Round overs" + "Splash over" and" "Rounds out" + "Splash out" actually is it humanly possible to say these 4 word quickly in succession??