As a simple infantryman, and a TA infantryman to boot, a few gunner-related questions have crossed my mind from time to time which just won't go seem to go away by ignoring them. I've already tried that. I've also already tried asking my colleagues and it is obvious they have the same lack of understanding as I have. I'd be appreciative if someone wouldn't mind having a go at clearing the fog with regards to the following. I was brought up on the notion that there would be a battery commander working with the CO in BGHQ and a FOO with company group HQ directing arty fire. As I understood it, the FOO had a direct line to the guns of his regiment and could order its fire at will. Given this, I've never been entirely sure what the BC did as he seemed to be outside the FOO/gunline loop (no offence meant here, it's just never been clear to me). My first question is: is this an accurate depiction of the situation today and, if so, how then does an FST fit into all this? Does the FST sit at company or BGHQ level and does it replace the FOO/BC duo in any way? Secondly, please can someone enlighten me as to where the FDC, FSCC and FPC sit within the BG/higher/lower structure, and in short, what do they do? I used to believe an FSCC was based at BGHQ but am no longer sure. Needless to say, I have never knowingly met a FOO, BC, or FST in person or walked into an FDC, FPC etc. Thanks in advance and apologies for the use of any mildly disreputable technical language.