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A ground proximity warning system (GPWS) is a system designed to alert pilots if their aircraft is in immediate danger of flying into the ground or an obstacle. The United States Federal Aviation Administration (FAA) defines GPWS as a type of terrain awareness and warning system (TAWS). [ 1 ]
GPWS was found to be superior in that it would warn only when necessary, provide maximum warning time with minimal unwanted alarms, and use command-type warnings. [6] Based on these reports and NTSB recommendations, in 1992 the FAA amended §135.153 to require GPWS equipment on all turbine-powered airplanes with ten or more passenger seats. [6 ...
An enhanced ground proximity warning system (EGPWS) that could have prevented the accident was introduced in 1996. [27] [28] [29] All U.S. registered turbine-powered aircraft capable of carrying more than six passengers built since 2002 are required to have an advanced terrain awareness warning system. [30] [31]
The GPWS either had activated false alarm or had sent 'FAULT' message on the aircraft's monitor that prompted the crew to switch it off. Due to the inoperative GPWS, the crew was unable to receive any warning regarding the oncoming terrain. [1]: 57–58 The repeated failures of the GPWS was noted by investigators.
The first generation of those systems was known as a ground proximity warning system (GPWS), which used a radar altimeter to assist in calculating terrain closure rates. That system was further improved with the addition of a GPS terrain database and is now known as an enhanced ground proximity warning system (EGPWS). When combined with ...
TERPROM (terrain profile matching) is a military navigation Ground Proximity Warning System (GPWS) employed on aircraft and missiles, which uses stored digital elevation data combined with navigation system and radar altimeter inputs to compute the location of an aircraft or missile above the surface of the Earth. It is also used as a warning ...
One potential problem with TCAS II is the possibility that a recommended avoidance maneuver might direct the flight crew to descend toward terrain below a safe altitude. Recent requirements for incorporation of ground proximity mitigate this risk. Ground proximity warning alerts have priority in the cockpit over TCAS alerts.
The U.S. FAA defines GPWS as a type of terrain awareness warning system.[1] More advanced systems, introduced in 1996,[2] are known as enhanced ground proximity warning system, although sometimes confusingly labeled with the TAWS term. I think this should be rephrased. As far as I know, the EGPWS is a TAWS. TAWS is the system, EGPWS is a ...