Altimeters, Variometers (Varios), Altimeter-Variometers (Alti-Varios) and Alti-Vario-GPS (Global Positioning Systems) for paragliding (PG), hang gliding (HG), free flight, powered paragliding (PPG), paramotoring, powered hang gliding (SPHG), FLPA (Foot Launched Powered Aircraft), and hot-air ballooning.