The pilot will have to fly the aircraft to within the scope before the ILS can help with performing landing.The list of adjectives users of the newest iteration of Microsoft’s Flight Simulator include “breathtaking,” “unbelievable,” and things of the like. The scope is most often defined by the ILS to provide a controlled landing. The pre-defined limited path an aircraft has to take towards a specified point. ![]() The glide path can be taken towards the glidescope or towards a lower altitude. The descending path an aircraft has to take towards a specified point. Often this descent is controlled with the autopilot. Often this descent equals the sinkrate, saving fuel flying as a glider. For example, a Cat I localizer must shutdown within 10 seconds of detecting a fault, but a Cat III localizer must shut down in less than 2 seconds.Ĭontrolled descent of an aircraft with engines (close to) idle. With the increasing categories, ILS equipment is required to shut down faster since higher categories require shorter response times. Cat I relies only on altimeter indications for decision height, whereas Cat II and Cat III approaches use radar altimeter to determine decision height.Īn ILS is required to shut down upon internal detection of a fault condition as mentioned in the monitoring section. A Head-up display which allows the pilot to perform aircraft manoeuvres rather than an automatic system is considered as fail-operational. For example, Cat IIIc requires a fail-operational system, along with a Landing Pilot (LP) who holds a Cat IIIc endorsement in their logbook, Cat I does not. In each case a suitably equipped aircraft and appropriately qualified crew are required. A Category III C system is capable of using an aircraft's autopilot to land the aircraft and can also provide guidance along the runway surface.
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