Vector math can be fun...
If only things had exploded when I got answers right in HS Algebra; would've made that class far more interesting.
I kinda like using the TDC that's supplied in the game. Although I have my doubts about the historical accuracty of the in-game distance knob that disallows full manual input! Thankfully if we're working with close to zero-gyro shots, it doesn't really matter.