outer marker

== English == === Noun === outer marker (plural outer markers) (aviation) 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. ==== Synonyms ==== OM ==== Hypernyms ==== marker beacon ==== Hyponyms ==== locator outer marker ==== Coordinate terms ==== fan marker inner marker middle marker