I had trouble several times with the notepad like forgetting to cancel old data. Since then I make my inputs directly in the slide out dials in scope or UZO view. This way I can have a last look before shooting that all data is correct.
I have no problem with AOB or speed of target, I find out the most difficult to estimate is the range, specially if the sea is not perfectly calm. But the real guys had the same problem, they didn't have a magician as Weapon Officer who could make the call in 2 seconds and answer "no problemo, Herr Kaleun, target is running 6 knts with AOB 27° and distance 2184.5 meters...
