WindyCalcPro is an easy and very handy aviation wind triangle calculator for pilots, featuring an real flying intrument combined with a fully functional magnetic compass that can be activated or deactivated.Perfect for pilots, instructors, students.Simply set the wind direction(WD) and the intended Ground Course(GC) on the graphical compass, set the wind speed(WS) and the True Air Speed(TAS), and immediately get the required flight Heading(HD) and the actual Ground Speed (GS).