lift being generated. It uses a pressure differential system to provide the pilot with a visual representation of reserve lift available. See also Acronyms and abbreviations in avionics ICAO recommendations on use of the International System of Units Flight instruments Global Positioning System Indicated airspeed Position error Speedometer V speeds References Additional reading Installing and flying the Lift Reserve Indicator, article and photos by Sam Buchanan http://home.hiwaay.net/~sbuc/journal/liftreserve.htm Aircraft instruments Airspeed Measuring instruments Speed sensors