Typically made of glass or plastic, the combiner reflects information towards the pilot’s eyes without obstructing the exterior view through the windshield or blocking the passage of ambient light. A transparent display screen, called a combiner.A computer that receives data (including real-time metrics from the aircraft system sensors, avionics instrumentation, and satellite data). To operate effectively, a HUD system typically includes the following components: David Dobrydney, via Wikimedia Commons HUD System Components The system provides targeting and tracking information in real time. 2Ī Scorpion HMD system being tested by U.S. In fact, the Federal Aviation Administration (FAA) now allows pilots to make landings in “no natural vision” (zero-visibility) situations as long as there is an "enhanced flight vision system" (EFVS) installed, for example, an aircraft HUD system, or a helmet-mounted display (HMD) for the pilot. HUDs are particularly useful if visibility conditions are poor. The symbology can include aircraft position information like altitude, a horizon line, heading & flight path, turn/bank & slip/skid indicators, radar data, and airspeed, along with other data from the plane's avionics and instrumentation (HUDs on military aircraft may also display information such as an attack target, weapons status, etc.) Photo: by Shawn from Airdrie, Canada (CRJ HUD), via Wikimedia CommonsConventional HUDs display virtual shapes and symbols that provide weather, navigational, and other information, collectively referred to as "symbology". HUD in a Bombardier CRJ-200 displays the horizon line and other key flight information at 1000 ft.
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