middle marker

noun

A type of marker beacon placed to indicate the missed approach point of a Category I ILS or IGS approach (typically the point at which the glideslope descends through 200 feet AGL), triggering a continuous visual and aural sequence of alternating Morse code dots and dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

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Meanings

nounmiddle marker (plural middle markers)

plural middle markers

  1. aeronauticsA type of marker beacon placed to indicate the missed approach point of a Category I ILS or IGS approach (typically the point at which the glideslope descends through 200 feet AGL), triggering a continuous visual and aural sequence of alternating Morse code dots and dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

    Synonyms: MM

Synonyms & antonyms

nounA type of marker beacon placed to indicate the missed approach point of a Category I ILS or IGS approach (typically the point at which the glideslope descends through 200 feet AGL), triggering a continuous visual and aural sequence of alternating Morse code dots and dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

Similar
MM
Cite this entry
APA

middle marker. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/middle%20marker

MLA

“middle marker.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/middle%20marker. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “middle marker,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/middle%20marker.

Source: middle marker on Wiktionary, CC BY-SA 4.0.