en

inner marker beacon

1

Terminological databases

EKI terminibaas Esterm

ID 735031 Last modified 03.05.2024
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Domain air trafficradio navigation systems
lähimarker
IM
inner marker
inner marker beacon
IM
внутренний маркерный радиомаяк
  • a marker beacon used in conjunction with an ILS (instrument landing system) and located between the middle marker and the threshold of the runway where an ILS approach is being made
    Good to know
    • It is usually located at a distance where aircraft height would be 100 ft above the touchdown point elevation on a Cat II approach. It transmits a 75 MHz fan-shaped radiation pattern modulated at 3000 Hz and keyed at six dots per second. It indicates to the pilot, both aurally and visually, that he or she is at the designated decision height (DH), normally 100 ft (30 m) above the touchdown zone elevation, on the ILS CAT II approach. It also marks progress during a CAT III approach.
Good to know
  • Valdkond ICAO lisade põhjal loodud klassifikaatori järgi: Lennundusside (telekommunikatsioon)
Related
lähimarker
Usage examples
  • Markermajakad (marker beacon) - mille abil määratakse ettenähtud kauguspunktid lähenemistrajektooril, näiteks kaugmarker, keskmarker ja lähimarker.
IM abbreviation
inner marker
Usage examples
  • The inner marker, when installed, shall be located so as to indicate in low visibility conditions the imminence of arrival at the runway threshold.
inner marker beacon
Usage examples
  • Some ILS approaches have an inner marker beacon that transmits a signal modulated with 3000 Hz in a series of dots only. It is placed at the land-or-go-around decision point of the approach close to the runway threshold.
IM abbreviation
внутренний маркерный радиомаяк

Metroloogia terminibaas

ID 1121367 Last modified 21.03.2026
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Domain metrologymeasuring instrumentsmeasuring procedures
lähimaamajakas preferred
lähimaaraadiomajakas preferred
lähimajakas
lähimarkermajakas
inner marker beacon preferred
locator inner
  • raadiomajakas, mis paikneb lennuvälja maandumisraja lävest 75 m kuni 450 m kaugusel ja mille markerantenn on suunatud otse üles
  • beacon that is normally positioned 75 m to 450 m from the threshold of the runway on some ILS approach systems, and marker antenna is highly directional
lähimaamajakas preferred
Usage examples
  • Lähimaamajaka markerantenn on suunatud otse üles, kehtestades ellipsilaadse signaaliala mõõtmetega 730 m x 1280 m.
lähimaaraadiomajakas preferred
lähimajakas
lähimarkermajakas
lähimarkeermajakas former
inner marker beacon preferred
Usage examples
  • The inner marker beacon is pointed straight up, establishing an elliptical signal area measuring 730 m x 1280 m.
locator inner

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