FlightMath was developed with pilots and flight simulator fans in mind, to replace the clumsy ASA E6-B Flight Computer. It takes full advantage of the Mac s interface to make the traditionally tedious preflight calculations extremely easy (some say even fun). For instance, instead of fussing with using a pencil to make marks on a chart to compute course corrections in the midst of winds, you simply drag the hands around a compass rose, with a hand each for wind direction and true course.