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GPWS computer analyzed the information from radar. Visual Audio RA measures how far aircraft from the ground. In the late 1990s improvements were made and the system was renamed "Enhanced Ground Proximity Warning System“ (EGPWS)Ħ How GPWS Works? RA measures how far aircraft from the ground. The use of a GPWS in large aircraft is required by law in many countries. CFIT incidents have been reduced since GPWS entered widespread use in the 1970s. 4ĥ CFIT and GPWS CFIT can be the result of factors such as navigation errors, pilot fatigue, or reduced visibility owing to weather conditions. Since 1960s, a series of Controlled Flight Into Terrain (CFIT) accidents killed hundreds of people.
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GPWS has greatly reduced the number of these incidents. CFIT accidents involve a normally operating aircraft which contacts the ground due to loss of situational awareness, or other pilot error. Prior to the widespread implementation of GPWS, CFIT was an all too common occurrence. The pilots are alerted through visual and audio warnings by GPWS display inside cockpit.ģ Purpose of GPWS The main purpose of these systems is to prevent what is called a Controlled Flight Into Terrain (CFIT) CFIT is an accident in which an aircraft crashes into the ground, the water, or an obstacle such as a mountain or building. 1 Lecture 9: Ground Proximity Warning System (GPWS)Ģ What is GPWS? A Ground Proximity Warning System (GPWS) is a type of equipment carried by aircraft to warn pilots if they are at a dangerously low altitude and in danger of crashing.
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