Realistic Artillery Management - FOO Rule

[Imp]

Dont take as gospel as must admit stopped using Comp Com a while back myself as did not see the benefit. Sometimes use to call in his 60mm MTR mainly because I know its near him so have a rough idea of what is in range for it. Your assumption makes perfect sense & apart from US is probably how it was done. With more & better radios they may have got on direct.
Because eyes on will be more important the ability to spread target area by sheafs or whatever becomes critical which was my beef anyway, as all at one hex negates kill advantage gained.