English Explanatory Dictionary

inner marker

English dictionary entry

Meanings

noun
  1. A type of marker beacon placed to indicate when an aircraft crosses the runway threshold of a Category II or Category III ILS or IGS approach, triggering a continuous visual and aural sequence of rapid-fire Morse code dots from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

Word forms

inner marker inner markers

Synonyms

IM
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