Digging in, a TOAW III "improvement" ?

[Currahee]

You certainly may want your arty dug in at the end of the round, for just that reason; or, you may not, if you're allowing the supply level to build back up, and with it, the readiness; leaving it "mobile" will keep it fresh for next turn, when you may wish to assign targets manually.

But assuming you do want it dug in to provide supporting fires, it's not necessary to manually dig in each turn, as long as it's on "D" already, because it supports on "digging in", just as well as on "entrenched" or "fortified"; what I was trying to say (and I didn't say it very well!) was that I don't make a point to dig each one in manually, if it's already on "D", to try to get it to "E" or "F"; but I do look at my arty each turn and decide what to do, but once they're on "D" I may be able to leave them for several turns; or often as not, I put them back on "mobile" to allow them to accumulate supply. Because when they accumulate supply over 33, they gain readiness as well, and you get more bang for the buck!