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средний радиомаркер

1

Terminological databases

EKI terminibaas Esterm

ID 735180 Last modified 03.05.2024
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Domain air traffic
keskmarker
MM
middle marker
middle marker beacon
MM
средний маркерный радиомаяк
  • ILS süsteemi 75MHz sagedusel töötav komponent
  • an ILS (instrument landing system) navigation facility in the terminal area navigation system located approximately 3500 ft from the runway approach end on the extended centerline, transmitting a 75 MHz fan-shaped radiation pattern, modulated at 1300 Hz
    Good to know
    • It is keyed alternately dot and dash and received by compatible airborne equipment, indicating to the pilot both aurally and visually, that he or she is passing over the facility. The middle marker is located at or near the point of decision height for ILS Cat I.
Good to know
  • Valdkond ICAO lisade põhjal loodud klassifikaatori järgi: Lennundusside (telekommunikatsioon)
Related
keskmarker
Usage examples
  • Keskmarker asub tavaliselt raja lähedal otsusekõrguse punktis, kus glissaadi kõrgus maapinnast on umbes 200 jalga. Keskmarkeri signaal koosneb punktidest ja kriipsudest sagedusel 1300 Hz, 6 märki sekundis ja sünkroonselt vilgub oranž lamp.
MM abbreviation
middle marker
Usage examples
  • The middle marker shall be located so as to indicate the imminence, in low visibility conditions, of visual approach guidance.
middle marker beacon
Usage examples
  • A middle marker beacon is also used. It is located on approach approximately 3,500 feet from the runway. It also transmits at 75 MHz. The middle marker transmission is modulated with a 1300 Hz tone that is a series of dots and dashes so as to not be confused with the all dash tone of the outer marker.
MM abbreviation
средний маркерный радиомаяк

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