Many thanks for this extremely useful dosument, it helped enmesh me back to a game / genre I had abandoned for two years now.
Of course, back then it was a
real simulation, SH3, not this bugfest that euphemistically is called a 'final version' of the game. I believe that the designers of SH4 became quite envious of FPS and wanted to create a hybrid :p, hence the total absence of all the useful TDC tools present in SH3.
However, given the dearth of map and plotting tools and the absence of the chronometer, your document is indeed very helpful.
One very friendly criticism though, and forget my venom here as it is targeted towards Ubisoft (and other irresponsible game designers around the world

):
Indeed, the two sections on Range and AOB are very easy and informative.
What your document lacks, however, is a clear and concise explanation of speed estimation. E.g., when you mention the 12 o' clock point of the PK and its relation to the scope,
which bearing in the 12 o' clock pt do you refer to?
Then, you mention subtracting or adding to the AOB by moving the scope but yet you indicate that the scope is already locked, don't you?
Again, a couple of screen shots - just going the extra mile! - would indeed transform your guide into an extremely instructive tool!