Cockpit mental arithmetic
Recently i've been introduced to some good and quick 'rough' calculations that can be made whilst flying in addition to some good rules of the thumb. Please would anyone be so kind as to post a few of the favourites; i.e simple ways to calculate a crosswind component on a final approach, diversions, off track errors.
I think these could be really useful to see the different techniques and see which is the easiest and works best.
Thanks