A reference calculator for in-flight landing distances for the Airbus A319/320/321 IAE/CFM series of aircraft. This calculator will cater for 95%+ of landing calculations made by the pilot in considering F3 & Flap Full on runways designated as 'Dry' or 'Good' braking action. This calculator considers: Dry/Good BA. Flap 3, Flap Full. Autobrake Low, Medium & Max Manual.