outer marker

noun

A type of marker beacon placed to indicate the final approach fix of an ILS or IGS approach, triggering a continuous sequence of visual and aural Morse code dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

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Meanings

nounouter marker (plural outer markers)

plural outer markers

  1. aeronauticsA type of marker beacon placed to indicate the final approach fix of an ILS or IGS approach, triggering a continuous sequence of visual and aural Morse code dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

    Synonyms: OM

Synonyms & antonyms

nounA type of marker beacon placed to indicate the final approach fix of an ILS or IGS approach, triggering a continuous sequence of visual and aural Morse code dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

Similar
OM
Cite this entry
APA

outer marker. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/outer%20marker

MLA

“outer marker.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/outer%20marker. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “outer marker,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/outer%20marker.

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