Well, that all pretty much makes sense to me except the part about quick set-up. The artillery "hipshoot" has been around for some time. I dug up some information on it published in 1978, which was before GPS I think. Never can tell what the military had when and didn't bother to tell anyone. The intent was to get rounds out pretty quickly. I'm sure accuracy had to suffer some because all the quick set-up couldn't have done all the stuff you described. They basically kicked out a spotting round and adjusted to target from that, assuming the round wasn't lost.
One other thing that was mentioned was the "hipshoot" wasn't a universal concept. The US Army used it in 1978, but I'm not sure who else used it. Information on it can be found in FM 3-09.70 "Tactics, Techniques, and Procedures for M109A6 Howitzer (Paladin) Operations". The time standards are in an ARTEP doc I can't get to. I would have to believe with GPS, the concept has to be more universal now, however I doubt everyone calls it a "hipshoot"
