Basic gpws however provide warning for the obstacles

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with GPWS. Basic GPWS, however, provide warning for the obstacles, which are directly below the aircraft, and, it does give information about the obstructions just ahead of it. Thus if there is a sudden change in terrain, such as a steep slope, GPWS will not detect the aircraft closure rate until it is too late for evasive action. In 2002 an advanced version of GPWS, known as “Enhanced Ground Proximity Warning System” (EGPWS) or “Terrain Avoidance Warning System (TAWS)” based on new technology was introduced, which could solve this problem by presenting information about obstacles ahead of the aircraft. In addition it (c) UPES, Not for Reproduction/ Sale
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Notes ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ Aviation Safety & Security Management could also give warnings about the wind shear and excessive bank angle on approach. TCAS or ACAS On 12th November, 96, a tragic aircraft accident occurred over Village Charkhi Dadari near Delhi. On that day one B747 of Saudi Arab Airlines and an IL-76 aircraft of Kazakhstan Airlines collided in the air while Saudia was climbing to 14,000ft and Kazakh was descending to 15,000ft. All the 351 innocent passengers and crew of both the aircraft got killed and the debris of the ill-fated aircraft mingled with the dead bodies fell over the fields. The mid-air collision left the world stunned. It was evident that at least one of the aircraft was not maintaining proper height. Since Delhi Air Traffic Control was not equipped with the Secondary Surveillance Radar (SSR), ATC was not aware of the heights maintained by the two aircraft, as the Primary Radar available with Delhi ATC does not show the heights of the aircraft over the Radar screen. And then questions were raised whether the sad mishap somehow could have been averted. Within six months of the Saudia-Kazakh mid-air, another incident was reported. ‘Air-Force One’ (also known as the ‘flying White’ House), the VIP Jumbo jet (B747-200) aircraft which is the official aircraft used by the President of the United States, came dangerously close to another US Cargo plane while they were about 400 kms off the European Coast. These aircraft were operating flights between USA and Europe on reciprocal tracks and they came close to each other within 2 to 3 nautical miles (4 to 6 kms) laterally and less than 1000 ft. vertically. At a combined speed of about 1500-2000 kms an hour (or about 25 to 30 kms per minute), these aircraft should have been hardly 15 to 20 seconds away from each other creating a critically dangerous situation. However immediate alert warnings in the cockpit were given by the state-of-the-art equipment known as “Traffic Alert Collision Avoidance System (TCAS)” and the pilots could manoeuvre the aircraft safely taking them out of danger. Thus because of the presence of a particular equipment, a possible disaster could be averted.
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  • Fall '19
  • Instrument approach, Runway, Rajiv, Aviation Safety & Security Management

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