Билет по английскому язык №13

С О Г Л А С О В А Н О Председатель  цикловой  комиссии ________________ «  »  2016 г.

УТВЕРЖДАЮ заместитель директора по УВР ____________ «  »  2016г.

  БИЛЕТ ПО АНГЛИЙСКОМУ ЯЗЫК №13

Группа ПЛА курс 3 семестр 6

ILS (Instrument Landing System)

The ILS is designed to provide an approach path for exact alignment and descent of an aircraft on final approach to a runway.

The ground equipment consists of two highly directional transmitting systems along with three (or fewer) marker beacons. The directional transmitters are known as the localizer and glide path transmitters.

The system may be divided functionally into three parts: guidance information – localizer, glidepath Range information – marker beacons, Visual information – approach lights, touchdown and centerline lights, runway lights.

The localizer transmitter, operating on one of the twenty ILS channels emits signals which provide the pilot with course guidance to the runway centerline. The UHF (ultra high frequency) glidepath transmitter, operating on one of the twenty ILS channels radiates the signals principally in the direction of the final approach. Ordinarily, there are two marker beacons associated with an ILS; the outer marker and middle marker. However, some locations may employ a third beacon – the inner marker.

The outer marker normally indicates a position at which an aircraft at the appropriate altitude on the localizer course will intercept the ILS glide path.

The middle marker indicates a position at which an aircraft is approximately 3500 feet from the landing threshold. This will also be the position at which an aircraft on the glidepath will be at an altitude of approximately 200 feet above the elevation of the touchdown zone.

The inner marker, where installed, will indicate a point at which an aircraft is at a designated decision height on the glidepath between the middle marker and landing threshold.

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